Article
Chemistry, Physical
Bapun Barik, Yejin Yun, Aniket Kumar, Hohan Bae, Yeon Namgung, Jun-Young Park, Sun-Ju Song
Summary: Acidic group functionalized graphene oxide (GO) is used to improve the quality of state-of-the-art Nafion electrolytes for next-generation fuel cell application. Single-step-phosphorylated graphene oxide (sPGO) modified Nafion (sPGO/NF) achieves high proton conductivity, chemical durability, and power density under actual fuel cell conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Aogui Wu, Jianfa Liu, Jinzhen Huang, Yu Min, Yitong Wang, Shichao Wang, Lei Wang
Summary: Constructing high-density hydrogen bonding networks is important for improving the proton conductivity of proton exchange membranes (PEMs) and the single-cell output power of high-temperature fuel cells (HTFCs). In this study, a series of benzimidazole polymers containing a pyridine group were successfully synthesized via copolymerization. The high-density hydrogen network was constructed by blending different polymers and using a cross-linking agent. The results showed significantly enhanced proton conductivity and output power density of the single cell.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Caizhi Zhang, Hao Liu, Tao Zeng, Jiawei Chen, Pengfeng Lin, Bo Deng, Fujian Liu, Yifeng Zheng
Summary: This study investigated the effects of different short circuit activation parameters on the performance of fuel cells. It was found that short-circuit duration parameter had the greatest impact on activation, while short-circuit interval had the smallest impact. The five activation parameters are interdependent and the optimal parameter value needs to be analyzed in combination with the operating conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Energy & Fuels
Tien-Fu Yang, Bor-Hung Sheu, Mohammad Ghalambaz, Wei-Mon Yan
Summary: The study investigated the dynamic behavior of a single-cell proton exchange membrane fuel cell under various loading modes and operation parameters. It found that the fuel cell performed best at a working temperature of 65 degrees Celsius and with a humidification condition of T-a/T-c=70 degrees Celsius/60 degrees Celsius.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Energy & Fuels
Nur Ain Masleeza Harun, Norazuwana Shaari, Nik Farah Hanis Nik Zaiman
Summary: SPEEK is recognized as a promising alternative PEM in fuel cell applications due to its advantageous properties, but its proton conductivity is influenced by the degree of sulfonation. While high DS of SPEEK can produce high proton conductivity, excessive production of DS may have side effects on membrane stability. Therefore, finding the optimal DS of SPEEK is crucial for fabricating PEM alternatives.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Review
Chemistry, Physical
M. A. Aminudin, S. K. Kamarudin, B. H. Lim, E. H. Majilan, M. S. Masdar, N. Shaari
Summary: Due to the harmful consequences of pollutants emitted by conventional fuel cars, vehicle manufacturers are shifting towards alternative energy sources. Fuel cells (FCs) are considered as highly efficient and non-polluting power sources capable of delivering greater energy densities and efficiency than conventional technologies. Proton exchange membrane fuel cells (PEMFC) are promising in transportation sectors due to their ability to start at cold temperatures and minimal emissions. This article discusses the pros and cons of the technology, various fuel cell types, their applications, and recent issues associated with fuel cell technology in the automobile sector.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Xingzi Yu, Caizhi Zhang, Min Fan, Bo Deng, Chengcheng Huang, Jiangfeng Xu, Deman Liu, Shangfeng Jiang
Summary: This paper analyzes the dynamic characteristics of defective cells in a PEMFC stack under different load conditions. The results reveal that the defective cell has a slower dynamic response rate and causes poor voltage uniformity in the stack. Increased frequency and amplitude of load change have negative effects on the defective cell, making it more prone to flooding. Impedance spectrum analysis shows that these load conditions have a greater negative impact on the defective cell compared to other cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Polymer Science
Kehua Lin, Chengxiang Wang, Zhiming Qiu, Yurong Yan
Summary: A novel polymer membrane with a high acid uptake, conductivity, strength, and stability was developed by introducing a pyridobisimidazole unit into the backbone, meeting the requirements for Proton Exchange Membrane applications. The new membrane demonstrated excellent oxidative stability, high thermal stability, and mechanical stability, making it a promising candidate for PEM fuel cells.
Review
Chemistry, Physical
Hang Wang, Jinghan Zhang, Xin Ning, Mingwei Tian, Yunze Long, Seeram Ramakrishna
Summary: The article discusses the importance of proton exchange membrane (PEM) in proton exchange membrane fuel cells (PEMFC) and the current research status of preparing nanofiber composite proton exchange membranes (NCPEMs) using nanocomposite technology. By introducing nanofibers, long-range proton transport channels can be formed and the skeleton can be reinforced to improve the performance of PEMFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Tunahan Gunduz, Tolga Demircan
Summary: A numerical analysis was conducted to investigate the effects of current collector plate geometry on the performance of a cylindrical PEM fuel cell. The results showed that using helix flow channels in the current collector plate geometry can increase the flow density and current density of the fuel cell, and the power density also increases with the operating pressure.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Lei Liu, Yijing Xing, Zhiyong Fu, Yifan Li, Zhuoqun Li, Haibin Li
Summary: In this study, a novel approach for preparing membrane electrode assemblies (MEAs) is proposed to optimize the interface combination and durability of proton exchange membrane (PEM) and catalyst layers (CLs). This approach combines a wet-contact interface design strategy and expanded polytetrafluoroethylene (ePTFE) reinforcing technology. The MEAs prepared using the wet-contact process show significantly reduced interfacial resistance and charge-transfer resistance, improved electrochemical surface area, and superior power performance compared to conventional MEAs. The insertion of ePTFE reinforcement skeletons into the PFSA membrane also reduces hydrogen crossover and mechanical degradation.
JOURNAL OF POWER SOURCES
(2023)
Article
Environmental Sciences
Asif Jamil, Sikander Rafiq, Tanveer Iqbal, Hafiza Aroosa Aslam Khan, Haris Mahmood Khan, Babar Azeem, M. Z. Mustafa, Abdulkader S. Hanbazazah
Summary: Fuel cells are environmentally friendly technology with high efficiency and economic advantages. Proton exchange membranes, especially for hydrogen fuel cells, have great potential but face challenges in terms of cost and degradation of proton exchange capacity over time.
Article
Energy & Fuels
Houchang Pei, Shaoyun Song, Zean Wang, Junjie Zhao, Huawei Chang, Zhengkai Tu
Summary: Water management is crucial for the efficient and stable operation of PEMFC. The implementation of the inner dehumidification technique successfully mitigates water flooding inside the PEMFC, resulting in increased performance and temperature distribution uniformity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Ankit Kumar, Hsiao-Chun Su, Yong-Song Chen, Amornchai Arpornwichanop
Summary: Proton exchange membrane fuel cells utilize a proton conductive membrane to transport hydrogen protons, with the membrane's conductivity affected by water content. This study investigates the use of zeolite in the anode catalyst layer and explores the impact of various factors on the performance of the membrane electrode assembly (MEA). Results show that MEA with specific configurations exhibit optimal performance under certain operating conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Seung Yeop Yi, Eunho Choi, Ho Yeon Jang, Seonggyu Lee, Jinkyu Park, Daeeun Choi, Yeju Jang, Hojin Kang, Seoin Back, Segeun Jang, Jinwoo Lee
Summary: By tuning the local environment of atomically dispersed iron catalysts through defect engineering, improved performance in proton exchange membrane fuel cells can be achieved. The optimized catalyst exhibits excellent oxygen reduction reaction activity and shows great potential for practical applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Tong Huang, Haifei Jiang, John C. C. Douglin, Yu Chen, Shuoyao Yin, Junfeng Zhang, Xiaojuan Deng, Hong Wu, Yan Yin, Dario R. R. Dekel, Michael D. D. Guiver, Zhongyi Jiang
Summary: This study reports the synthesis of charged COF-NSs in open space using a single-phase organic solution system, achieving high volume yields. Charge-induced electrostatic repulsion forces enable the growth of large and crystalline COF-NSs from initial discrete and disordered polymers. The charged COF-NS colloidal suspensions can be cast into thin and compact proton exchange membranes with excellent proton conductivity and fuel cell performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Yuhan Wang, Haifei Jiang, Zheyuan Guo, Hanze Ma, Shaoyu Wang, Hongjian Wang, Shuqing Song, Junfeng Zhang, Yan Yin, Hong Wu, Zhongyi Jiang, Michael D. Guiver
Summary: This article discusses the progress in advanced organic microporous membranes for carbon emission reduction and capture, focusing on confined mass transport mechanisms, design principles, and CO2 separation applications. The authors analyze the abnormal confinement effect in organic microporous membrane channels and propose design principles such as nano-assembly engineering, reticular engineering, and microenvironment engineering. They also summarize four categories of organic microporous membrane materials, namely polymers of intrinsic microporosity, graphene oxide, metal-organic framework, and covalent organic framework. Lastly, the article provides a perspective on the opportunities and challenges for the transition from advanced membranes to real-world applications.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Tanya Agarwal, Ivana Matanovic, Santosh Adhikari, Eun Joo Park, Siddharth Komini Babu, Yu Seung Kim, Ding Tian, Chulsung Bae, Oscar Morales-Collazo, Joan F. Brennecke, Ajay K. Prasad, Suresh G. Advani, Allen Sievert, Timothy Hopkins, Andrew Park, Rod Borup
Summary: Improving the electrochemical stability of proton exchange membranes is crucial for heavy-duty fuel cell vehicles. Cerium has been found to reduce the chemical degradation of membranes, but its migration during fuel cell operation limits its effectiveness. It has been discovered that partially fluorinated phosphonic acids can enhance cerium retention and reduce fluoride emission rate.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Daniel P. Leonard, Michelle Lehmann, Jeffrey M. Klein, Ivana Matanovic, Cy Fujimoto, Tomonori Saito, Yu Seung Kim
Summary: Ionomers in the catalyst layer have a significant impact on the performance of fuel cells and electrolyzers. The adsorption of phenyl and electrochemical oxidation of phenyl moieties can negatively affect the alkaline devices' performance. This study compares the adsorption energy of phenyl-containing ionomers and demonstrates the advantage of phenyl-free structures. The findings highlight the importance of material interactions between catalysts and ionomers and establish the relationship between phenyl adsorption energy and electrode performance.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
Ivana Matanovic, Yu Seung Kim
Summary: This mini review explains the significant impact of electrochemical phenyl oxidation on the performance and durability of water electrolyzers in the anode catalyst layers. Although studies on phenyl oxidation on platinum group metal-free catalysts under high electrode potential are limited, studies with platinum group metal catalysts have shown profound effects. The review summarizes ionomer-catalyst interactions in alkaline electrochemical devices, emphasizes the importance of minimizing interactions between the phenyl moiety of ionomers and oxygen evolution reaction catalysts, and discusses the adsorption energies of phenyl groups on different oxygen evolution catalysts. Mitigation strategies for electrochemical phenyl oxidation in advanced water electrolyzers are briefly discussed.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Michelle Lehmann, Daniel Leonard, Jackie Zheng, Lilin He, Xiaomin Tang, Xi Chelsea Chen, Katie Heeyum Lim, Sandip Maurya, Yu Seung Kim, Tomonori Saito
Summary: A series of quaternized polynorbornene random copolymers were synthesized via vinyl addition polymerization, and the impact of polymer composition on their properties was elucidated. The quaternary ammonium alkyl tether length and the ratio of n-hexylnorbornene to unsubstituted norbornene were tailored to control the copolymer properties. The study provides important insight into design parameters for quaternized polynorbornenes.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
De Ao, Zibo Yang, Zhihua Qiao, Yuxiu Sun, Zhengqing Zhang, Michael D. Guiver, Chongli Zhong
Summary: A self-supported MOF crystal-glass composite (CGC) membrane was prepared by melt quenching ZIF-62 and ZIF-8 mixture. The membrane exhibited improved gas permeance and selectivity due to its unique structure. The thickness of the membrane can be adjusted without the need of a support substrate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Environmental
Weisheng Yu, Chengpeng Wei, Kaiyu Zhang, Jianjun Zhang, Zijuan Ge, Xian Liang, Michael D. Guiver, Xiaolin Ge, Liang Wu, Tongwen Xu
Summary: In this study, a 4-sulfocalix[4]arene (4-SCA)-modified graphene oxide (GO) membrane was successfully fabricated, which exhibited high ion permeability and selectivity, as well as pH-responsiveness. The membrane preferentially transported potassium ions over radionuclide cations and showed an order of magnitude higher ion selectivity than the unmodified GO membrane. The improved selectivity resulted from the specific recognition between 4-SCA and radionuclide cations, which was responsive to the protonation/deprotonation transformation of 4-SCA. This biomimetic permselective GO membrane has potential applications in efficient nuclear wastewater treatment and contributes to a deeper understanding of biomimetic ion transport mechanisms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Yabiao Pei, Weikang Zhu, Runfei Yue, Jie Yao, Xin Liu, Lianqin Wang, Junfeng Zhang, Yan Yin, Michael D. Guiver
Summary: Adjusting the catalyst/ionomer agglomerate is crucial for high-performance catalyst layers, especially for non-precious metal catalysts. The solvent, as a sacrificial component, plays a vital role in determining the microstructure and performance of anion exchange membrane fuel cells (AEMFCs) during the formation process of the catalyst layer. By studying solvent mixtures of isopropanol (IPA) and tetrahydrofuran (THF), a control-lable construction of Co/Fe-N-C catalyst layers was achieved. The results show that the ratio of IPA and THF strongly affects the aggregate state and microstructure of the ionomers and catalysts, and the Co/Fe-N-C catalyst layer prepared with IPA:THF = 1:2 (v/v) exhibits a high performance AEMFC with a peak power density of 545.3 mW cm-2 at 80 degrees C.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Zibo Yang, Youssef Belmabkhout, Lauren N. McHugh, De Ao, Yuxiu Sun, Shichun Li, Zhihua Qiao, Thomas D. Bennett, Michael D. Guiver, Chongli Zhong
Summary: A new amorphous glass foam material called a(gf)ZIF-62 was developed for gas separation, which exhibits ultrahigh permeance and good selectivity. This material has the potential to greatly reduce the cost of difficult industrial gas separations, such as CH4/N-2 separation.
Article
Chemistry, Physical
Honghong Lin, Zhendong Hu, Katie H. Lim, Siwen Wang, Li Qin Zhou, Liang Wang, Gaohua Zhu, Keiichi Okubo, Chen Ling, Yu Seung Kim, Hongfei Jia
Summary: Understanding the impact of H3PO4 on catalyst activity is crucial for HT-PEMFC catalyst research. This study utilized HT-RDE to investigate the ORR in H3PO4 and found that H3PO4 reduction occurs during cyclic voltammetry, forming H3PO3. A modified protocol was developed to avoid H3PO3 generation and reliable ORR measurements were obtained. The results showed that carbon-supported PtM bimetallic alloy catalysts had higher ORR activity than Pt and that H3PO4 primarily reduces available sites for ORR.
Article
Chemistry, Multidisciplinary
Caijiao Yu, Xixi Cen, Zhengqing Zhang, Yuxiu Sun, Wenjuan Xue, Zhihua Qiao, Michael D. Guiver, Chongli Zhong
Summary: In this study, a new strategy of step-nucleation in situ self-repair was proposed to prepare large-area ultrathin and rollable MOF membranes on a flexible polymer membrane support. This strategy enables the practical implementation of large-area MOF membranes and has potential applications in gas separation.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Tanya Agarwal, Allen C. Sievert, Siddharth Komini Babu, Santosh Adhikari, Eun Joo Park, Ajay K. Prasad, Suresh G. Advani, Timothy E. Hopkins, Andrew M. Park, Yu Seung Kim, Rodney L. Borup
Summary: Radical species generated during fuel cell operation limit the durability for heavy-duty vehicle applications. Incorporating radical scavenger additives like cerium mitigates chemical attacks, but their migration during operation reduces durability and performance. This study explores cation size selective agents to immobilize cerium within PFSA membranes. An organometallic complex of cerium with 15-Crown-5 significantly improves cerium retention and chemical durability. It also prevents migration and enhances cerium's radical scavenging activity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Chenyang Zheng, Di Xiao, Junfeng Zhang, Yabiao Pei, Lianqin Wang, Xin Liu, Yan Yin, Michael D. Guiver, Xianguo Li
Summary: The relationship between molecular conformation of anion exchange ionomers (AEIs) and catalyst layer (CL) parameters in anion exchange membrane fuel cells (AEMFCs) under dynamic operating conditions was studied. The meta-AEI showed a lower swelling ratio compared to para-AEI, resulting in higher water retention ability and improved CL stability.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Tanya Agarwal, Santosh Adhikari, Yu Seung Kim, Siddharth Komini Babu, Ding Tian, Chulsung Bae, Nguyet N. T. Pham, Seung Geol Lee, Ajay K. Prasad, Suresh G. Advani, Allen Sievert, Wipula Priya Rasika Liyanage, Timothy E. Hopkins, Andrew Park, Rod Borup
Summary: Phosphonic acids are a promising class of radical scavengers that can effectively remove radicals without migration issues, making them valuable for proton-exchange membrane fuel cells.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Tianyu Chen, Zhibin Lu, Guangjin Zeng, Yongmin Xie, Jie Xiao, Zhifeng Xu
Summary: The study introduces a high-performance LSGM electrolyte-supported tubular DC-SOFC stack for portable applications, which shows great potential in developing into high-performing, efficient, and environmentally friendly portable power sources for distributed applications.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Wenbin Tong, Yili Chen, Shijie Gong, Shaokun Zhu, Jie Tian, Jiaqian Qin, Wenyong Chen, Shuanghong Chen
Summary: In this study, a three-dimensional porous NiO interface layer with enhanced anode dynamics is fabricated, forming a Schottky contact with the zinc substrate, allowing rapid and uniform zinc plating both inside and below the interface layer. The resulting NiO@Zn exhibits exceptional stability and high capacity retention.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yafeng Bai, Kaidi Li, Liying Wang, Yang Gao, Xuesong Li, Xijia Yang, Wei Lu
Summary: In this study, a flexible zinc ion supercapacitor with gel electrolytes, porous alpha-MnO2@reduced graphene oxide cathode, and activated carbon/carbon cloth anode was developed. The device exhibits excellent electrochemical performance and stability, even at low temperatures, with a high cycle retention rate after 5000 cycles.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Anmol Jnawali, Matt D. R. Kok, Francesco Iacoviello, Daniel J. L. Brett, Paul R. Shearing
Summary: This article presents the results of a systematic study on the electrochemical performance and mechanical changes in two types of commercial batteries with different anode chemistry. The study reveals that the swelling of anode layers in batteries with silicon-based components causes deformations in the jelly roll structure, but the presence of a small percentage of silicon does not significantly impact the cycling performance of the cells within the relevant state-of-health range for electric vehicles (EVs). The research suggests that there is room for improving the cell capacities by increasing the silicon loading in composite anodes to meet the increasing demands on EVs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yohandys A. Zulueta, My Phuong Pham-Ho, Minh Tho Nguyen
Summary: Advanced atomistic simulations were used to study ion transport in the Na- and K-doped lithium disilicate Li2Si2O5. The results showed that Na and K doping significantly enhanced Li ion diffusion and conduction in the material.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Zongying Han, Hui Dong, Yanru Yang, Hao Yu, Zhibin Yang
Summary: An efficient phase inversion-impregnation approach is developed to fabricate BaO-decorated Ni8 mol% YSZ anode-supported tubular solid oxide fuel cells (SOFCs) with anti-coking properties. BaO nanoislands are successfully introduced inside the Ni-YSZ anode, leading to higher peak power densities and improved stability in methane fuel. Density functional theory calculations suggest that the loading of BaO nanoislands facilitates carbon elimination by capturing and dissociating H2O molecules to generate OH.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Suresh Mamidi, Dan Na, Baeksang Yoon, Henu Sharma, Anil D. Pathak, Kisor Kumar Sahu, Dae Young Lee, Cheul-Ro Lee, Inseok Seo
Summary: Li-CO2 batteries, which utilize CO2 and have a high energy density, are hindered in practical applications due to slow kinetics and safety hazards. This study introduces a stable and highly conductive ceramic-based solid electrolyte and a metal-organic framework catalyst to improve the safety and performance of Li-CO2 batteries. The optimized Li-CO2 cell shows outstanding specific capacity and cycle life, and the post-cycling analysis reveals the degradation mechanism of the electrodes. First-principles calculations based on density functional theory are also performed to understand the interactions between the catalyst and the host electrode. This research demonstrates the potential of MOF cathode catalyst for stable operation in Li-CO2 batteries.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Ganghua Xiang, Zhihuan Qiu, Huilong Fei, Zhigang Liu, Shuangfeng Yin, Yuen Wu
Summary: In this study, a CeFeOx-supported Pt single atoms and subnanometric clusters catalyst was developed, which exhibits enhanced catalytic activity and stability for the preferential oxidation of CO in H2-rich stream through synergistic effect.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Dimitrios Chatzogiannakis, Marcus Fehse, Maria Angeles Cabanero, Natalia Romano, Ashley Black, Damien Saurel, M. Rosa Palacin, Montse Casas-Cabanas
Summary: By coupling electrochemical testing to operando synchrotron based X-ray absorption and powder diffraction experiments, blended positive electrodes consisting of LiMn2O4 spinel (LMO) and layered LiNi0.5Mn0.3Co0.2O2 (NMC) were studied to understand their redox mechanism. It was found that blending NMC with LMO can enhance energy density at high rates, with the blend containing 25% LMO showing the best performance. Testing with a special electrochemical setup revealed that the effective current load on each blend component can vary significantly from the nominal rate and also changes with SoC. Operando studies allowed monitoring of the oxidation state evolution and changes in crystal structure, in line with the expected behavior of individual components considering their electrochemical current loads.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Chiara Cementon, Daniel Dewar, Thrinathreddy Ramireddy, Michael Brennan, Alexey M. Glushenkov
Summary: This Perspective discusses the specific power and power density of lithium-ion capacitors, highlighting the fact that their power characteristics are often underestimated. Through analysis, it is found that lithium-ion capacitors can usually achieve power densities superior to electrochemical supercapacitors, making them excellent alternatives to supercapacitors.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Weihao Wang, Hao Yu, Li Ma, Youquan Zhang, Yuejiao Chen, Libao Chen, Guichao Kuang, Liangjun Zhou, Weifeng Wei
Summary: This study achieved an improved electrolyte with excellent low-temperature and high-voltage performance by regulating the Li+ solvation structure and highly concentrating it. The electrolyte exhibited outstanding oxidation potential and high ionic conductivity under low temperature and high voltage conditions, providing a promising approach for the practical application of high-voltage LIBs.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Martin Bures, Dan Gotz, Jiri Charvat, Milos Svoboda, Jaromir Pocedic, Juraj Kosek, Alexandr Zubov, Petr Mazur
Summary: Vanadium redox flow battery is a promising energy storage solution with long-term durability, non-flammability, and high overall efficiency. Researchers have developed a mathematical model to simulate the charge-discharge cycling of the battery, and found that hydraulic connection of electrolyte tanks is the most effective strategy to reduce capacity losses, achieving a 69% reduction.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
M. Rodriguez-Gomez, J. Campo, A. Orera, F. de La Fuente, J. Valenciano, H. Fricke, D. S. Hussey, Y. Chen, D. Yu, K. An, A. Larrea
Summary: In this study, we analysed the operando performance of industrial lead cells using neutron diffraction experiments. The experiments revealed the evolution of different phases in the positive electrode, showed significant inhomogeneity of phase distribution inside the electrode, and estimated the energy efficiency of the cells.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Jiawei Liu, Chenpeng Wang, Yue Yao, Hao Ye, Yinglong Liu, Yingli Liu, Xiaoru Xu, Zhicong Chen, Huazheng Yang, Gang Wu, Libin Lei, Chao Wang, Bo Liang
Summary: The study focuses on utilizing double conductive Ni-pads as anode collectors in micro-tubular solid oxide fuel cells. The simulation results show excellent performance and stability of DCNPs, and also highlight the potential applications in various fields.
JOURNAL OF POWER SOURCES
(2024)
Article
Chemistry, Physical
Yang Wang, Kangjie Zhou, Lang Cui, Jiabing Mei, Shengnan Li, Le Li, Wei Fan, Longsheng Zhang, Tianxi Liu
Summary: This study presents a polyimide sandwiched separator (s-PIF) for improving the cycling stability of Li-metal batteries. The s-PIF separator exhibits superior mechanical property, electrolyte adsorption/retention and ion conductivity, and enables dendrite-free Li plating/stripping process.
JOURNAL OF POWER SOURCES
(2024)
