Journal Sciences News
Veterinary Clinics of North America: Exotic Animal Practice
30 June 2018
Effective regeneration of anode material recycled from scrapped Li-ion batteries
Publication date: 30 June 2018
Source:Journal of Power Sources, Volume 390 Author(s): Jin Zhang, Xuelei Li, Dawei Song, Yanli Miao, Jishun Song, Lianqi Zhang Recycling high-valuable metal elements (such as Li, Ni, Co, Al and Cu elements) from scrapped lithium ion batteries can bring significant economic benefits. However, recycling and reusing anode material has not yet attracted wide attention up to now, due to the lower added-value than the above valuable metal materials and the difficulties in regenerating process. In this paper, a novel regeneration process with significant green advance is proposed to regenerate anode material recycled from scrapped Li-ion batteries for the first time. After regenerated, most acetylene black (AB) and all the styrene butadiene rubber (SBR), carboxymethylcellulose sodium (CMC) in recycled anode material are removed, and the surface of anode material is coated with pyrolytic carbon from phenolic resin again. Finally, the regenerated anode material (graphite with coating layer, residual AB and a little CMC pyrolysis product) is obtained. As expected, all the technical indexs of regenerated anode material exceed that of a midrange graphite with the same type, and partial technical indexs are even closed to that of the unused graphite. The results indicate the effective regeneration of anode material recycled from scrapped Li-ion batteries is really achieved.

Graphical abstract

image
30 June 2018
Efficiency improvement of an all-vanadium redox flow battery by harvesting low-grade heat
Publication date: 30 June 2018
Source:Journal of Power Sources, Volume 390 Author(s): Danick Reynard, C.R. Dennison, Alberto Battistel, Hubert H. Girault Redox flow batteries (RFBs) are rugged systems, which can withstand several thousand cycles and last many years. However, they suffer from low energy density, low power density, and low efficiency. Integrating a Thermally Regenerative Electrochemical Cycle (TREC) into the RFB, it is possible to mitigate some of these drawbacks. The TREC takes advantage of the temperature dependence of the cell voltage to convert heat directly into electrical energy. Here, the performance increase of a TREC-RFB is investigated using two kinds of all-vanadium electrolyte chemistries: one containing a typical concentration of sulfuric acid and one containing a large excess of hydrochloric acid. The results show that the energy density of the system was increased by 1.3Wh L
15 June 2018
The load shift potential of plug-in electric vehicles with different amounts of charging infrastructure
Publication date: 30 June 2018
Source:Journal of Power Sources, Volume 390 Author(s): Till Gnann, Anna-Lena Klingler, Matthias K
15 June 2018
Controlling porosity of porous carbon cathode for lithium oxygen batteries: Influence of micro and meso porosity
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Minjae Kim, Eunjoo Yoo, Wha-Seung Ahn, Sang Eun Shim In rechargeable lithium-oxygen (Li-O2) batteries, the porosity of porous carbon materials plays a crucial role in the electrochemical performance serving as oxygen diffusion path and Li ion transfer passage. However, the influence of optimization of porous carbon as an air electrode on cell electrochemical performance remains unclear. To understand the role of carbon porosity in Li-O2 batteries, carbon materials featuring controlled pore sizes and porosity, including C-800 (nearly 96% microporous) and AC-950 (55:45 micro/meso porosity), are designed and synthesized by carbonization using a triazine-based covalent organic polymer (TCOP). We find that the microporous C-800 cathode allows 120 cycles with a limited capacity of 1000 mAh g
15 June 2018
A highly active hybrid catalyst modified (La0.60Sr0.40)0.95Co0.20Fe0.80O3-
15 June 2018
A self-supported metal-organic framework derived Co3O4 film prepared by an in-situ electrochemically assistant process as Li ion battery anodes
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Guangyu Zhao, Xin Sun, Li Zhang, Xuan Chen, Yachun Mao, Kening Sun Derivates of metal-organic frameworks are promising materials of self-supported Li ion battery anodes due to the good dispersion of active materials, conductive scaffold, and mass transport channels in them. However, the discontinuous growth and poor adherence of metal-organic framework films on substrates hamper their development in self-supported electrodes. In the present study, cobalt-based metal-organic frameworks are anchored on Ti nanowire arrays through an electrochemically assistant method, and then the metal-organic framework films are pyrolyzed to carbon-containing, porous, self-supported anodes of Li ion battery anodes. Scanning electron microscope images indicate that, a layer cobaltosic oxide polyhedrons inserted by the nanowires are obtained with the controllable in-situ synthesis. Thanks to the good dispersion and adherence of cobaltosic oxide polyhedrons on Ti substrates, the self-supported anodes exhibit remarkable rate capability and durability. They possess a capacity of 300
15 June 2018
Potassium vanadate K0.23V2O5 as anode materials for lithium-ion and potassium-ion batteries
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Cailing Liu, Shaohua Luo, Hongbo Huang, Zhiyuan Wang, Qing Wang, Yahui Zhang, Yanguo Liu, Yuchun Zhai, Zhaowen Wang A layered potassium vanadate K0.23V2O5 has been successfully prepared by the hydrothermal method and evaluated as an anode material for lithium-ion and potassium-ion batteries. High structural stability is demonstrated by the ex situ X-ray diffraction (XRD) and ex situ scanning electron microscopy (SEM). When used as an anode material for lithium-ion batteries, the K0.23V2O5 exhibits a reversible capacity of 480.4
15 June 2018
Iron-antimony-based hybrid oxides as high-performance anodes for lithium-ion storage
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Tuan Loi Nguyen, Doo Soo Kim, Jaehyun Hur, Min Sang Park, Sukeun Yoon, Il Tae Kim We report a facile approach to synthesize Fe-Sb-based hybrid oxides nanocomposites consisting of Sb, Sb2O3, and Fe3O4 for use as new anode materials for lithium-ion batteries. The composites are synthesized via galvanic replacement between Fe3+ and Sb at high temperature in triethylene glycol medium. The phase, morphology, and composition changes of the composites involved in the various stages of the replacement reaction are characterized using X-ray diffractometry, high-resolution transmission electron microscopy, and energy dispersive X-ray spectroscopy. The as-prepared composites have different compositions with very small particle sizes (<< 10
15 June 2018
Photovoltaic performance and stability of fullerene/cerium oxide double electron transport layer superior to single one in p-i-n perovskite solar cells
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Zhou Xing, Shu-Hui Li, Bao-Shan Wu, Xin Wang, Lu-Yao Wang, Tan Wang, Hao-Ran Liu, Mei-Lin Zhang, Da-Qin Yun, Lin-Long Deng, Su-Yuan Xie, Rong-Bin Huang, Lan-Sun Zheng Interface engineering that involves in the metal cathodes and the electron transport layers (ETLs) facilitates the simultaneous improvement of device performances and stability in perovskite solar cells (PSCs). Herein, low-temperature solution-processed cerium oxide (CeOx) films are prepared by a facile sol-gel method and employed as the interface layers between [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) and an Ag back contact to form PC61BM/CeOx double ETLs. The introduction of CeOx enables electron extraction to the Ag electrode and protects the underlying perovskite layer and thus improves the device performance and stability of the p-i-n PSCs. The p-i-n PSCs with double PC61BM/CeOx ETLs demonstrate a maximum power conversion efficiency (PCE) of 17.35%, which is superior to those of the devices with either PC61BM or CeOx single ETLs. Moreover, PC61BM/CeOx devices exhibit excellent stability in light soaking, which is mainly due to the chemically stable CeOx interlayer. The results indicate that CeOx is a promising interface modification layer for stable high-efficiency PSCs.

Graphical abstract

image
15 June 2018
Multi-timescale power and energy assessment of lithium-ion battery and supercapacitor hybrid system using extended Kalman filter
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Yujie Wang, Xu Zhang, Chang Liu, Rui Pan, Zonghai Chen The power capability and maximum charge and discharge energy are key indicators for energy management systems, which can help the energy storage devices work in a suitable area and prevent them from over-charging and over-discharging. In this work, a model based power and energy assessment approach is proposed for the lithium-ion battery and supercapacitor hybrid system. The model framework of the lithium-ion battery and supercapacitor hybrid system is developed based on the equivalent circuit model, and the model parameters are identified by regression method. Explicit analyses of the power capability and maximum charge and discharge energy prediction with multiple constraints are elaborated. Subsequently, the extended Kalman filter is employed for on-board power capability and maximum charge and discharge energy prediction to overcome estimation error caused by system disturbance and sensor noise. The charge and discharge power capability, and the maximum charge and discharge energy are quantitatively assessed under both the dynamic stress test and the urban dynamometer driving schedule. The maximum charge and discharge energy prediction of the lithium-ion battery and supercapacitor hybrid system with different time scales are explored and discussed.

Graphical abstract

image
15 June 2018
A novel differential electrochemical mass spectrometry method to determine the product distribution from parasitic Methanol oxidation reaction on oxygen reduction reaction catalysts
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Tilman Jurzinsky, Philipp Kurzhals, Carsten Cremers The oxygen reduction reaction is in research focus since several decades due to its importance for the overall fuel cell performance. In direct methanol fuel cells, the crossover of methanol and its subsequent parasitic oxidation are main issues when it comes to preventing fuel cell performance losses. In this work, we present a novel differential electrochemical mass spectrometry method to evaluate oxygen reduction reaction catalysts on their tolerance to methanol being present at the cathode. Besides this, the setup allows to measure under more realistic fuel cell conditions than typical rotating disc electrode measurements, because the oxygen reduction reaction is evaluated in gaseous phase and a gas diffusion electrode is used as working electrode. Due to the new method, it was possible to investigate the oxygen reduction reaction on two commonly used catalysts (Pt/C and Pt3Co/C) in absence and presence of methanol. It was found, that Pt3Co/C is less prone to parasitic current losses due to methanol oxidation reaction. By connecting a mass spectrometer to the electrochemical cell, the new method allows to determine the products formed on the catalysts due to parasitic methanol electrooxidation.
15 June 2018
Review on solid electrolytes for all-solid-state lithium-ion batteries
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Feng Zheng, Masashi Kotobuki, Shufeng Song, Man On Lai, Li Lu All-solid-state (ASS) lithium-ion battery has attracted great attention due to its high safety and increased energy density. One of key components in the ASS battery (ASSB) is solid electrolyte that determines performance of the ASSB. Many types of solid electrolytes have been investigated in great detail in the past years, including NASICON-type, garnet-type, perovskite-type, LISICON-type, LiPON-type, Li3N-type, sulfide-type, argyrodite-type, anti-perovskite-type and many more. This paper aims to provide comprehensive reviews on some typical types of key solid electrolytes and some ASSBs, and on gaps that should be resolved.
15 June 2018
Liquid water breakthrough location distances on a gas diffusion layer of polymer electrolyte membrane fuel cells
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Junliang Yu, Dieter Froning, Uwe Reimer, Werner Lehnert The lattice Boltzmann method is adopted to simulate the three dimensional dynamic process of liquid water breaking through the gas diffusion layer (GDL) in the polymer electrolyte membrane fuel cell. 22 micro-structures of Toray GDL are built based on a stochastic geometry model. It is found that more than one breakthrough locations are formed randomly on the GDL surface. Breakthrough location distance (BLD) are analyzed statistically in two ways. The distribution is evaluated statistically by the Lilliefors test. It is concluded that the BLD can be described by the normal distribution with certain statistic characteristics. Information of the shortest neighbor breakthrough location distance can be the input modeling setups on the cell-scale simulations in the field of fuel cell simulation.
15 June 2018
Polycarbonate-based polyurethane as a polymer electrolyte matrix for all-solid-state lithium batteries
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Junjie Bao, Gaojian Shi, Can Tao, Chao Wang, Chen Zhu, Liang Cheng, Gang Qian, Chunhua Chen Four kinds of polycarbonate-based polyurethane with 814
15 June 2018
Design, fabrication and performance evaluation of an integrated reformed methanol fuel cell for portable use
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Shubin Zhang, Yufeng Zhang, Junyu Chen, Congwen Yin, Xiaowei Liu In this paper, an integrated reformed methanol fuel cell (RMFC) as a portable power source is designed, fabricated and tested. The RMFC consists of a methanol steam reformer (MSR), a high temperature proton exchange membrane fuel cell (HT-PEMFC) stack, a microcontroller unit (MCU) and other auxiliaries. First, a system model based on Matlab/Simulink is established to investigate the mass and energy transport characteristics within the whole system. The simulation results suggest a hydrogen flow rate of at least 670 sccm is needed for the system to output 30
15 June 2018
Identification and quantification of gases emitted during abuse tests by overcharge of a commercial Li-ion battery
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Y. Fernandes, A. Bry, S. de Persis As hazardous situations can occur during the life of a Li-ion battery, it is of great importance to understand its behavior under abusive conditions (mechanical, thermal or electrical). In particular, the study of overcharge, which consists of forcing a current through the cell, can be very helpful in improving battery safety. Very few studies in the literature have focused on the chemical reaction mechanism responsible for failure during overcharge. This is, however, of great interest because a Li-ion battery can produce reactions in a sealed container and is thus a highly reactive system. Here, experimental approaches are employed to understand the reaction mechanisms that occur during overcharge testing. Experiments consist of studying the overcharge kinetics of a commercial battery at an initial state of charge of 100%. The battery is maintained in a known volume and gaseous samples are withdrawn both at the end of the test and continuously during the test. The main gaseous species are then identified and quantified by gas phase chromatography coupled with mass spectrometry and FTIR spectroscopy. This experimental study is completed by a numerical investigation to determine the combustion parameters of the exhaust gases using a detailed reaction mechanism associated with a numerical code.
15 June 2018
Challenges and perspectives of garnet solid electrolytes for all solid-state lithium batteries
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Qi Liu, Zhen Geng, Cuiping Han, Yongzhu Fu, Song Li, Yan-bing He, Feiyu Kang, Baohua Li Garnet Li7La3Zr2O12 (LLZO) solid electrolytes recently have attracted tremendous interest as they have the potential to enable all solid-state lithium batteries (ASSLBs) owing to high ionic conductivity (10
15 June 2018
High ion conductive Sb2O5-doped
15 June 2018
Optimized interface and recrystallized grains by CsBr treatment for enhanced photovoltaic performance of perovskite solar cells
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Li Liu, Pengyu Su, Huizhen Yao, Jun Wang, Wuyou Fu, Xizhe Liu, Haibin Yang Doping, interface optimization and recrystallization are effective approaches for fabricating high performance perovskite solar cells (PSCs). In our work, simple CsBr treatment is introduced to improve the performance of TiO2 nanorods-based PSCs. Both Cs+ and Br
15 June 2018
Oxidation driven ZnS Core-ZnO shell photocatalysts under controlled oxygen atmosphere for improved photocatalytic solar water splitting
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Daegil Bak, Jung Hyeun Kim Zinc type photocatalysts attract great attentions in solar hydrogen production due to their easy availability and benign environmental characteristics. Spherical ZnS particles are synthesized with a facile hydrothermal method, and they are further used as core materials to introduce ZnO shell layer surrounding the core part by partial oxidation under controlled oxygen contents. The resulting ZnS core-ZnO shell photocatalysts represent the heterostructural type II band alignment. The existence of oxide layer also influences on proton adsorption power with an aid of strong base cites derived from highly electronegative oxygen atoms in ZnO shell layer. Photocatalytic water splitting reaction is performed to evaluate catalyst efficiency under standard one sun condition, and the highest hydrogen evolution rate (1665
15 June 2018
Failure in lithium-ion batteries under transverse indentation loading
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Seung Hyun Chung, Thomas Tancogne-Dejean, Juner Zhu, Hailing Luo, Tomasz Wierzbicki Deformation and failure of constrained cells and modules in the battery pack under transverse loading is one of the most common conditions in batteries subjected to mechanical impacts. A combined experimental, numerical and analytical approach was undertaken to reveal the underlying mechanism and develop a new cell failure model. When large format pouch cells were subjected to local indentation all the way to failure, the post-mortem examination of the failure zones beneath the punches indicates a consistent slant fracture surface angle to the battery plane. This type of behavior can be described by the critical fracture plane theory in which fracture is caused by the shear stress modified by the normal stress. The Mohr-Coulomb fracture criterion is then postulated and it is shown how the two material constants can be determined from just one indentation test. The orientation of the fracture plane is invariant with respect to the type of loading and can be considered as a property of the cell stack. In addition, closed-form solutions are derived for the load-displacement relation for both plane-strain and axisymmetric cases. The results are in good agreement with the numerical simulation of the homogenized model and experimentally measured responses.
15 June 2018
Enhanced performance of lithium-sulfur batteries with an ultrathin and lightweight MoS2/carbon nanotube interlayer
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Lingjia Yan, Nannan Luo, Weibang Kong, Shu Luo, Hengcai Wu, Kaili Jiang, Qunqing Li, Shoushan Fan, Wenhui Duan, Jiaping Wang Ultrathin and lightweight MoS2/carbon nanotube (CNT) interlayers are developed to effectively trap polysulfides in high-performance lithiumsulfur (LiS) batteries. The MoS2/CNT interlayer is constructed by loading MoS2 nanosheets onto a cross-stacked CNT film. The CNT film with excellent conductivity and superior mechanical properties provides the LiS batteries with a uniform conductive network, a supporting skeleton for the MoS2 nanosheets, as well as a physical barrier for the polysulfides. Moreover, chemical interactions and bonding between the MoS2 nanosheets and the polysulfides are evident. The electrode with the MoS2/CNT interlayer delivers an attractive specific capacity of 784
15 June 2018
Anionic and cationic redox and interfaces in batteries: Advances from soft X-ray absorption spectroscopy to resonant inelastic scattering
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Wanli Yang, Thomas P. Devereaux Recent advances in battery science and technology have triggered both the challenges and opportunities on studying the materials and interfaces in batteries. Here, we review the recent demonstrations of soft X-ray spectroscopy for studying the interfaces and electrode materials. The focus of this review is on the recently developed mapping of resonant inelastic X-ray scattering (mRIXS) as a powerful probe of battery chemistry with superior sensitivity. Six different channels of soft X-ray absorption spectroscopy (sXAS) are introduced for different experimental purposes. Although conventional sXAS channels remain effective tools for quantitative analysis of the transition-metal states and surface chemistry, we elaborate the limitations of sXAS in both cationic and anionic redox studies. Particularly, based on experimental findings in various electrodes, we show that sXAS is unreliable for studying oxygen redox. We then demonstrate the mRIXS as a reliable technique for fingerprinting oxygen redox and summarize several crucial observations. We conclude that mRIXS is the tool-of-choice to study both the practical issue on reversibility of oxygen redox and the fundamental nature of bulk oxygen states. We hope this review clarifies the popular misunderstanding on oxygen sXAS results of oxide electrodes, and establishes a reliable technique for detecting oxygen redox through mRIXS.

Graphical abstract

image
15 June 2018
Facile synthesis of one-dimensional hollow Sb2O3@TiO2 composites as anode materials for lithium ion batteries
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Zhaomin Wang, Yong Cheng, Qian Li, Limin Chang, Limin Wang Metallic Sb is deemed as a promising anode material for lithium ion batteries (LIBs) due to its flat voltage platform and high security. Nevertheless, the limited capacity restricts its large-scale application. Therefore, a simple and effective method to explore novel antimony trioxide with high capacity used as anode material for LIBs is imperative. In this work, we report a facile and efficient strategy to fabricate 1D hollow Sb2O3@TiO2 composites by using the Kirkendall effect. When used as an anode material for LIBs, the optimal Sb2O3@TiO2 composite displays a high reversible discharge capacity of 593
15 June 2018
Improving low-temperature performance of spinel LiNi0.5Mn1.5O4 electrode and LiNi0.5Mn1.5O4/Li4Ti5O12 full-cell by coating solid-state electrolyte Li-Al-Ti-P-O
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Kun Bi, Shi-Xi Zhao, Chao Huang, Ce-Wen Nan Octahedral cathode materials LiNi0.5Mn1.5O4 (LNMO), with primary particles size of 300600
15 June 2018
Crosslinked polybenzimidazoles containing branching structure as membrane materials with excellent cell performance and durability for fuel cell applications
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Meishao Hu, Jiangpeng Ni, Boping Zhang, Sivasubramaniyan Neelakandan, Lei Wang Crosslinking is an effective method to improve the properties of high temperature proton exchange membranes based on polybenzimidazole. However, the compact structure of crosslinked polybenzimidazole hinders the phosphoric acid absorption of the membranes, resulting in a relatively poor fuel cell performance. Recently, we find that branched polymers can absorb more phosphoric acid with a larger free volume, but suffer from deteriorated mechanical strength. In this work, a new method is proposed to obtain excellent over-all properties of high temperature proton exchange membranes. A series of crosslinked polybenzimidazoles containing branching structure as membrane materials are successfully prepared for the first time. Compared with conventional crosslinked membranes, these crosslinked polybenzimidazole membranes containing branching structure exhibit a higher phosphoric acid doping level and proton conductivity, improved durability, lower swelling rate and comparable mechanical strength. In particular, the fuel cell base on the crosslinked and branched membrane with a 10% ratio of crosslinker in non-humidified hydrogen/air at 160
15 June 2018
New down-converter for UV-stable perovskite solar cells: Phosphor-in-glass
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Hee-Suk Roh, Gill Sang Han, Seongha Lee, Sanghyun Kim, Sungwoo Choi, Chulsoo Yoon, Jung-Kun Lee Degradation of hybrid lead halide perovskite by UV light is a crucial issue that limits the commercialization of lead halide perovskite solar cells (PSCs). To address this problem, phosphor-in-glass (PiG) is used to convert UV to visible light. Down-conversion of UV light by PiG dramatically increases UV-stability of PSCs and enables PSCs to harvest UV light that is currently wasted. Performance of PSCs with PiG layer does not change significantly during 100
15 June 2018
Amorphous Ni(Fe)OxHy-coated nanocone arrays self-supported on stainless steel mesh as a promising oxygen-evolving anode for large scale water splitting
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Junyu Shen, Mei Wang, Liang Zhao, Peili Zhang, Jian Jiang, Jinxuan Liu The development of highly efficient, robust, and cheap water oxidation electrodes is a major challenge in constructing industrially applicable electrolyzers for large-scale production of hydrogen from water. Herein we report a hierarchical stainless steel mesh electrode which features Ni(Fe)O x H y -coated self-supported nanocone arrays. Through a facile, mild, low-cost and readily scalable two-step fabrication procedure, the electrochemically active area of the optimized electrode is enlarged by a factor of 3.1 and the specific activity is enhanced by a factor of 250
15 June 2018
Electronic coupling induced high performance of N, S-codoped graphene supported CoS2 nanoparticles for catalytic reduction and evolution of oxygen
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Bohong Chen, Zhongqing Jiang, Lingshan Zhou, Binglu Deng, Zhong-Jie Jiang, Jianlin Huang, Meilin Liu A simple synthetic method is developed for the synthesis of CoS2/N, S-codoped graphene. The result shows the existence of a strong electronic coupling between CoS2 and N, S-codoped graphene. The pyrrolic and pyridinic type nitrogen and S in the form of C-S-C in N, S-codoped graphene are found to be the anchoring sites of the CoS2 nanoparticles. As a bifunctional catalyst, the CoS2/N, S-codoped graphene exhibits an oxygen reduction onset potential of 0.963
15 June 2018
CoM(M=Fe,Cu,Ni)-embedded nitrogen-enriched porous carbon framework for efficient oxygen and hydrogen evolution reactions
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Xiaogeng Feng, Xiangjie Bo, Liping Guo Rational synthesis and development of earth-abundant materials with efficient electrocatalytic activity and stability for water splitting is a critical but challenging step for sustainable energy application. Herein, a family of bimetal (CoFe, CoCu, CoNi) embedded nitrogen-doped carbon frameworks is developed through a facile and simple thermal conversion strategy of metal-doped zeolitic imidazolate frameworks. Thanks to collaborative superiorities of abundant M-N-C species, modulation action of secondary metal, cobalt-based electroactive phases, template effect of MOFs and unique porous structure, bimetal embedded nitrogen-doped carbon frameworks materials manifest good oxygen and hydrogen evolution catalytic activity. Especially, after modulating the species and molar ratio of metal sources, optimal Co0.75Fe0.25 nitrogen-doped carbon framework catalyst just requires a low overpotential of 303
1 June 2018
Multi-mode energy management strategy for fuel cell electric vehicles based on driving pattern identification using learning vector quantization neural network algorithm
Publication date: 15 June 2018
Source:Journal of Power Sources, Volume 389 Author(s): Ke Song, Feiqiang Li, Xiao Hu, Lin He, Wenxu Niu, Sihao Lu, Tong Zhang The development of fuel cell electric vehicles can to a certain extent alleviate worldwide energy and environmental issues. While a single energy management strategy cannot meet the complex road conditions of an actual vehicle, this article proposes a multi-mode energy management strategy for electric vehicles with a fuel cell range extender based on driving condition recognition technology, which contains a patterns recognizer and a multi-mode energy management controller. This paper introduces a learning vector quantization (LVQ) neural network to design the driving patterns recognizer according to a vehicle's driving information. This multi-mode strategy can automatically switch to the genetic algorithm optimized thermostat strategy under specific driving conditions in the light of the differences in condition recognition results. Simulation experiments were carried out based on the model's validity verification using a dynamometer test bench. Simulation results show that the proposed strategy can obtain better economic performance than the single-mode thermostat strategy under dynamic driving conditions.
1 June 2018
Editorial Board
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388

1 June 2018
Improvement of electrochemical properties and oxidation/reduction behavior of cobalt in positive electrode of Nimetal hydride battery
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Katsuya Morimoto, Ikuo Nagashima, Masaki Matsui, Hideshi Maki, Minoru Mizuhata The deterioration mechanisms of a Nimetal hydride (NiMH) battery system during operation is investigated. A decrease of the discharge voltage is observed at the early stage of the cycle, which indicates the possible occurrence of an unexpected system shutdown of the battery at low state of charge. Cyclic voltammetry and surface examination are used to investigate the causes of this phenomenon. The elution of elements such as Al and Mn from the metal hydride negative electrodes is shown to affect the oxidation/reduction behavior of Co, the conductive material of the positive electrode. Furthermore, the possible methods to strengthen the conductive network of Co, including pretreatment of the positive electrode, addition of conductive material, and precipitation of the elution elements as insoluble compounds to reduce their effect are also investigated. By combining these strategies, deterioration of the conductive network can be prevented in the early stage.

Graphical abstract

image
1 June 2018
High performance sulfur graphite full cell for next generation sulfur Li-ion battery
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Yunwen Wu, Toshiyuki Momma, Tokihiko Yokoshima, Hiroki Nara, Tetsuya Osaka Sulfur (S) Li-ion battery which use the metallic Li free anode is deemed as a promising solution to conquer the hazards originating from Li metal. However, stable cycling performance and low production price of the S Li-ion battery still remain challenging. Here, we propose a S-LixC full cell system by paring a S cathode and a pre-lithiated graphite anode which is cheap and commercially available. It shows stable cycling performance with a capacity around 1300
1 June 2018
Binder-free ZnO@ZnSnO3 quantum dots core-shell nanorod array anodes for lithium-ion batteries
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Hsiang Tan, Hsun-Wei Cho, Jih-Jen Wu In this work, ZnSnO3 quantum dots (QDs), instead of commonly used conductive carbon, are grown on the ZnO nanorod (NR) array to construct the binder-free ZnO@ZnSnO3 QDs core-shell NR array electrode on carbon cloth for lithium-ion battery. The ZnO@ZnSnO3 QDs core-shell NR array electrode exhibits excellent lithium storage performance with an improved cycling performance and superior rate capability compared to the ZnO NR array electrode. At a current density of 200
1 June 2018
Na1.25Ni1.25Fe1.75(PO4)3 nanoparticles as a janus electrode material for Li-ion batteries
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Claude Karegeya, Abdelfattah Mahmoud, Fr
1 June 2018
Dominant role of orbital splitting in determining cathode potential in O3 NaTMO2 compounds
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): M. Hussein N. Assadi, Yasuteru Shigeta Designing high potential cathodes for Na-ion batteries, which are comparable in performance to Li-ion cathodes, remains a challenging task. Through comprehensive density functional calculations, we disentangle the relationship between the cathode potential and the ionicity of TMO bonds in O3 NaTMO2 compounds in which TM ions is a fourth- or fifth-row transition metal. We demonstrate that the magnetic exchange interaction and the local distortions in the coordination environment of TM ions play more significant roles in determining the cathode potential of the TM3+
1 June 2018
High-capacity FeTiO3/C negative electrode for sodium-ion batteries with ultralong cycle life
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Changsheng Ding, Toshiyuki Nohira, Rika Hagiwara The development of electrode materials which improve both the energy density and cycle life is one of the most challenging issues facing the practical application of sodium-ion batteries today. In this work, FeTiO3/C nanoparticles are synthesized as negative electrode materials for sodium-ion batteries. The electrochemical performance and charge-discharge mechanism of the FeTiO3/C negative electrode are investigated in an ionic liquid electrolyte at 90
1 June 2018
Dense garnet-like Li5La3Nb2O12 solid electrolyte prepared by self-consolidation method
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Pengcheng Zhao, Yu Xiang, Yan Xu, Yuehua Wen, Wenfeng Zhang, Xiayu Zhu, Meng Li, Sontong Zhang, Hai Ming, Zhaoqing Jin, Gaoping Cao Li5La3Nb2O12 (LLNO) is a typical garnet-like solid electrolyte with solitary cubic structure. However, its ionic conductivity is relatively low due to the low relative density when prepared by cold isostatic pressing method, which usually involves high-pressure machines, poor productivity, tedious pressing operations, and low density. In this paper, self-consolidation method is developed to sinter dense LLNO electrolyte. Although not any pressing operations are employed in the entire process, the relative density of LLNO is promoted up to 95%, which is much higher than the reported values of 4580%. SEM images reveal that the sample is built by huge particles in size of 80
1 June 2018
High-energy lithium-ion battery using substituted LiCoPO4: From coin type to 1
1 June 2018
A numerical model for a thermally-regenerative ammonia-based flow battery using for low grade waste heat recovery
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Weiguang Wang, Gequn Shu, Hua Tian, Xiuping Zhu A stationary and a transient two-dimensional models, based on the universal conservation laws and coupled with electrochemical reactions, are firstly applied to describe a single thermally-regenerative ammonia-based flow battery (TR-AFB), and emphasis is placed on studying the effects of reactant concentrations, physical properties of the electrolyte, flow rates and geometric parameters of flow channels on the battery performance. The model includes several experimental parameters measured by cyclic voltammetry (CV), chronoamperometry (CA) and Tafel plot. The results indicate that increasing NH3 concentration has a decisive effect on the improvement of power production and is beneficial to use higher Cu2+ concentrations, but the endurance of membrane and self-discharge need to be considered at the same time. It is also suggested that appropriately reducing the initial Cu(NH3)4 2+ concentration can promote power and energy densities and mitigate cyclical fluctuation. The relation between the energy and power densities is given, and the models are validated by some experimental data.

Graphical abstract

image
1 June 2018
Sliding mode observer for proton exchange membrane fuel cell: automotive application
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Maxime Piffard, Mathias Gerard, Ramon Da Fonseca, Paolo Massioni, Eric Bideaux This work proposes a state observer as a tool to manage cost and durability issues for PEMFC (Proton Exchange Membrane Fuel Cell) in automotive applications. Based on a dead-end anode architecture, the observer estimates the nitrogen build-up in the anode side, as well as relative humidities in the channels. These estimated parameters can then be used at fuel cell management level to enhance the durability of the stack. This observer is based on transport equations through the membrane and it reconstructs the behavior of the water and nitrogen inside the channels without the need of additional humidity sensors to correct the estimate. The convergence of the output variables is proved with Lyapunov theory for dynamic operating conditions. The validation is made with a high-fidelity model running a WLTC (Worldwide harmonized Light vehicles Test Cycle). This observer provides the average values of nitrogen and relative humidities with sufficient precision to be used in a global real-time control scheme.
31 May 2018
Surface-protected LiCoO2 with ultrathin solid oxide electrolyte film for high-voltage lithium ion batteries and lithium polymer batteries
Publication date: 1 June 2018
Source:Journal of Power Sources, Volume 388 Author(s): Qi Yang, Jie Huang, Yejing Li, Yi Wang, Jiliang Qiu, Jienan Zhang, Huigen Yu, Xiqian Yu, Hong Li, Liquan Chen Surface modification of LiCoO2 with the ultrathin film of solid state electrolyte of Li1.4Al0.4Ti1.6(PO4)3 (LATP) has been realized by a new and facile solution-based method. The coated LiCoO2 reveals enhanced structural and electrochemical stability at high voltage (4.5
31 May 2018
Editorial Board
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387

31 May 2018
Short-range contacts govern the performance of industry-relevant battery cathodes
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Samantha L. Morelly, Nicolas J. Alvarez, Maureen H. Tang Fundamental understanding of how processing affects composite battery electrode structure and performance is still lacking, especially for industry-relevant electrodes with low fractions of inactive material. This work combines rheology, electronic conductivity measurements, and battery rate capability tests to prove that short-range electronic contacts are more important to cathode rate capability than either ion transport or long-range electronic conductivity. LiNi0.33Mn0.33Co0.33O2, carbon black, and polyvinylidene difluoride in 1-methyl-2-pyrrolidinone represent a typical commercial electrode with <5.5
31 May 2018
Role of polymeric binders on mechanical behavior and cracking resistance of silicon composite electrodes during electrochemical cycling
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Dawei Li, Yikai Wang, Jiazhi Hu, Bo Lu, Dingying Dang, Junqian Zhang, Yang-Tse Cheng This work focuses on understanding the role of various binders, including sodium alginate (SA), Nafion, and polyvinylidene fluoride (PVDF), on the mechanical behavior and cracking resistance of silicon composite electrodes during electrochemical cycling. In situ curvature measurement of bilayer electrodes, consisting of a silicon-binder-carbon black composite layer on a copper foil, is used to determine the effects of binders on bending deformation, elastic modulus, and stress on the composite electrodes. It is found that the lithiation induced curvature and the modulus of the silicon/SA electrodes are larger than those of electrodes with Nafion and PVDF as binders. Although the modulus of Nafion is smaller than that of PVDF, the curvature and the modulus of silicon/Nafion composite are larger than those of silicon/PVDF electrodes. The moduli of all three composites decrease not only during lithiation but also during delithiation. Based on the measured stress and scanning electron microscopy observations of cracking in the composite electrodes, we conclude that the stress required to crack the composite electrodes with SA and Nafion binders is considerably higher than that of the silicon/PVDF electrode during electrochemical cycling. Thus, the cracking resistance of silicon/SA and silicon/Nafion composite electrodes is higher than that of silicon/PVDF electrodes.
31 May 2018
Facile synthesis and electrochemical properties of continuous porous spheres assembled from defect-rich, interlayer-expanded, and few-layered MoS2/C nanosheets for reversible lithium storage
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Biao Chen, Huihui Lu, Naiqin Zhao, Chunsheng Shi, Enzuo Liu, Chunnian He, Liying Ma Hollow or continuous porous hierarchical MoS2/C structures with large Li-ion and electron transport kinetics, and high structural stability are urgent needs for their application in lithium ion batteries. In this regard, a novel continuous porous micro-sphere constructed from defect-rich, interlayer-expanded, and few-layered MoS2/C nanosheets is successfully synthesized through a facile one-pot hydrothermal method. The polyvinyl pyrrolidone surfactant serves as carbon source and supporter, while the CS2 works as soft template and sulfur source during hydrothermal process. The morphologies, structures, and electrochemical properties are systematically characterized. Importantly, it should be noted that the unique porous micro-spheres with merits of rich-defect, expanded-interlayer, few-layer (<5 layers), abundant pores and integrating carbon are favorable for lithium ion batteries application. When the uniform composites are used as lithium ion batteries anode materials, they deliver a high reversible capacity, excellent cycling performance (average capacity fading of 0.037% per cycle at 0.2
31 May 2018
Rational design of hierarchical ZnO@Carbon nanoflower for high performance lithium ion battery anodes
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Huichao liu, Ludi Shi, Dongzhi Li, Jiali Yu, Han-Ming Zhang, Shahid Ullah, Bo Yang, Cuihua Li, Caizhen Zhu, Jian Xu The rational structure design and strong interfacial bonding are crucially desired for high performance zinc oxide (ZnO)/carbon composite electrodes. In this context, micro-nano secondary structure design and strong dopamine coating strategies are adopted for the fabrication of flower-like ZnO/carbon (ZnO@C nanoflowers) composite electrodes. The results show the ZnO@C nanoflowers (26
31 May 2018
Synthesis, electrochemical investigation and structural analysis of doped Li[Ni0.6Mn0.2Co0.2-xMx]O2 (x = 0, 0.05; M = Al, Fe, Sn) cathode materials
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Matthias Eilers-Rethwisch, Martin Winter, Falko Mark Schappacher Layered Ni-rich Li[Ni0.6Mn0.2Co0.2-x M x ]O2 cathode materials (x

Examining the validity of Stoney-equation for in-situ stress measurements in thin film electrodes using a large-deformation finite-element procedure
Publication date: 31 May 2018
Source:Journal of Power Sources, Volume 387 Author(s): Jici Wen, Yujie Wei, Yang-Tse Cheng During the lithiation and delithiation of a thin film electrode, stress in the electrode is deduced from the curvature change of the film using the Stoney equation. The accuracy of such a measurement is conditioned on the assumptions that (a) the mechanical properties of the electrode remain unchanged during lithiation and (b) small deformation holds. Here, we demonstrate that the change in elastic properties can influence the measurement of the stress in thin film electrodes. We consider the coupling between diffusion and deformation during lithiation and delithiation of thin film electrodes and implement the constitutive behavior in a finite-deformation finite element procedure. We demonstrate that both the variation in elastic properties in thin film electrodes and finite-deformation during lithiation and delithiation would challenge the applicability of the Stoney-equation for in-situ stress measurements of thin film electrodes.
view: 230

Get the Derek Lam Crosby Luxor Cat Eye Sunglasses for only $79.95 + FREE Shipping at AC Lens!

Start: 22 Sep 2017 | End: 01 May 2018

Save up to 20% on the best available rate when travelling to Moscow!

Start: 15 Oct 2017 | End: 31 Jan 2018

Online Shopping Surf Save $ Battle

Code: 43% 59+

Start: 22 Sep 2017 | End: 31 Mar 2018

Search All Amazon* UK* DE* FR* JP* CA* CN* IT* ES* IN* BR* MX
Booking.com B.V. is based in Amsterdam in the Netherlands. Ready for some statistics? Our 1,534,024 properties, including 860,482 holiday rentals, are located in 123,105 destinations in 229 countries and territories, and are supported internationally by 198 offices in 70 countries.
2013 Copyright Techhap.com Mobile version 2015 | PeterLife & company
Skimlinks helps publishers monetize editorial content through automated affiliate links for products.
Terms of use Link at is mandatory if site materials are using fully or particulary.
Were treated to the site administrator, a cup of coffee *https://paypal.me/peterlife
Yandex.ru