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
David Bernhard, Thomas Kadyk, Sebastian Kirsch, Hannes Scholz, Ulrike Krewer
Summary: This work presents a model for predicting and analyzing voltage losses in proton exchange membrane fuel cells during accelerated stress testing. The model consists of two submodels - one describing the degradation of the catalyst active surface using a statistical physics-based approach, and another incorporating the degradation of catalyst activity. The model allows the description of catalyst surface reduction, changes in Tafel slope and exchange current density, and voltage losses.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
David Bernhard, Thomas Kadyk, Ulrike Krewer, Sebastian Kirsch
Summary: In this study, proton exchange membrane fuel cell cathodes were degraded using accelerated stress tests. The analysis showed that unspecified voltage losses exist not only at high current densities, but already at low current densities, and these losses increase linearly with decreasing half cell voltage.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Lei Xing, Gaojian Chen, Jin Xuan, Liang He, Qian Xu, Sheng Zhang, Huaneng Su, Weidong Shi
Summary: The non-uniform distribution of platinum in the cathode catalyst layers of proton exchange membrane fuel cells was found to affect the cell performance.
CHEMICAL ENGINEERING SCIENCE
(2022)
Article
Energy & Fuels
Yulin Wang, Han Wang
Summary: This paper investigates the dynamic characteristics of water droplet detachment from a rough gas diffusion layer (GDL) surface and finds that the gas velocity, space distance, and wettability of cubic pillars significantly affect the detachment process. On a highly hydrophilic surface, the water droplet detaches quickly regardless of spatial distance and gas velocity. On a moderately hydrophilic GDL, a larger space distance benefits droplet detachment. On a highly hydrophobic GDL, a larger space distance and higher gas velocity facilitate droplet detachment.
Article
Chemistry, Physical
Harilal, Avanish Shukla, Prakash Chandra Ghosh, Tushar Jana
Summary: The study successfully enhanced the structural and mechanical stability of pyridine-bridged oxypolybenzimidazole (PyOPBI) membranes in concentrated phosphoric acid, and significantly improved proton conductivity by incorporating bulky substituents and flexible aryl ether backbones. The membranes exhibited good stability and high proton conductivity at high temperatures, attributed to the bulky pendent groups and flexible backbone, showing promising potential for advanced PBI-based HT-PEM fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Thermodynamics
Qiming Cao, Haitao Min, Honghui Zhao, Weiyi Sun, Yuanbin Yu, Zhaopu Zhang, Junyu Jiang
Summary: This study introduces a low-temperature thermal management system for proton exchange membrane fuel cells (PEMFCs) that combines a phase-change material (PCM) with liquid cooling. The system effectively utilizes waste heat generated during fuel cell operation to heat the PCM, which is then transferred to the stack after shutdown to maintain the stack temperature above the minimum startup threshold. A thermal model of the system is established and validated using numerical simulations. The results demonstrate that the proposed system can sustain the stack temperature above 0 degrees C for 63.36 hours in an environment at -20 degrees C. The system also has better temperature uniformity and a reduced stack startup time compared to passive thermal management. This study provides innovative solutions to address the challenges of cold starts and is a valuable reference for future thermal management system designs.
APPLIED THERMAL ENGINEERING
(2024)
Article
Chemistry, Physical
J. O. Leader, Y. Yue, M. R. Walluk, T. A. Trabold
Summary: High-temperature proton exchange membrane fuel cells (HT-PEM) have advantages such as improved fuel impurity tolerance and increased electrode kinetics. This study investigated the voltage degradation of HT-PEM fuel cells operating at 200 degrees C under continuous load conditions and during start-stop cycling. The results showed relatively high degradation rates, but with decreasing average degradation rates over cycles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Mathematics, Interdisciplinary Applications
Bao Lv, Kai Han, Yongzhen Wang, Xiaolong Li
Summary: This study presents a two-dimensional finite element model to accurately predict the leakage rate of the sealing interface in a proton exchange membrane fuel cell, considering the microscopic surface morphology and the asperity contact process of the components. The surface morphology of the seal is constructed using the two-dimensional W-M fractal function, and the influence of fractal dimension (D) and scale parameter (G) on the surface profile is explored. The finite element method and Poiseuille fluid theory are used to obtain the deformation variables of the asperity under different clamping pressures and leakage rates. The quantitative analysis reveals the correlation between surface roughness and clamping pressure, as well as the behavior of deformation and leakage rate under different conditions.
FRACTAL AND FRACTIONAL
(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
Engineering, Environmental
Jianan Wang, Bowen Wang, Chasen Tongsh, Tianwei Miao, Peng Cheng, Zixuan Wang, Qing Du, Kui Jiao
Summary: This paper introduces a self-humidification design by connecting PEM and AEM fuel cells in series, which improves performance by 39% under specific conditions. The effectiveness of self-humidification is demonstrated, and it is shown that increasing current density can enhance performance. Further improvement in self-humidification can be achieved by reducing AEM thickness.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Chao Lei, Fan Yang, Natalia Macauley, Magali Spinetta, Gerie Purdy, Jasna Jankovic, David A. Cullen, Karren L. More, Yu Seung Kim, Hui Xu
Summary: Different ionomer dispersion solvents have a significant impact on the performance and durability of PEM fuel cells, with non-aqueous solvents showing advantages in morphology and stability of electrode layers.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Suchismita Subhadarshini, J. Shanthi Sravan, Omprakash Sarkar, S. Venkata Mohan, Tapta Kanchan Roy, Tushar Jana
Summary: In this study, a high-molecular weight sulfonated oxybispolybenzimidazole (MSOPBI) membrane was synthesized and tested in a microbial fuel cell (MFC). Compared to the traditional Nafion membrane, the MSOPBI membrane displayed better properties including moderate ion exchange capacity, good proton conductivity, low dimensional swelling, and enhanced mechanical strength. The MFC operation with the MSOPBI membrane showed higher power density and increased bioelectrochemical activity. Therefore, the newly synthesized MSOPBI membrane proves effective for the production of renewable energy and wastewater treatment in MFCs.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Yan Yin, Mengyuan Li, Xin Liu, Na Xie, Chenyang Zheng, Guokun Liu, Shuoyao Yin, Xintian Li, Yabiao Pei, Junfeng Zhang, Yanzhou Qin, Michael D. Guiver
Summary: In this study, a method to improve the proton conductivity of proton exchange membranes (PEMs) by adding CuFe-PBA is proposed. Unlike previous strategies, this method focuses on the mode of proton transport rather than simply increasing water uptake or enlarging hydrophilic domains. The experimental results show that SPSf/CuFe-PBA composite PEMs exhibit better performance than unfilled PEMs, especially under low humidity conditions, and are competitive with Nafion 212. Furthermore, scale-up trials and cost estimation indicate the economic and practical potential of CuFe-PBA and composite PEMs.
JOURNAL OF POWER SOURCES
(2022)
Article
Thermodynamics
Yi Li, Fang Yuan, Rengang Weng, Fang Xi, Wei Liu
Summary: The porosity distribution in the gas diffusion layer significantly impacts cell performance. An optimized three-dimensional nonuniform porosity distribution is proposed to increase current density and power density. Different design schemes are evaluated, with the optimized porosity distribution showing the best performance.
Article
Chemistry, Physical
N. Noguer, D. Candusso, R. Kouta, F. Harel, W. Charon, G. Coquery
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2015)
Article
Chemistry, Physical
S. Collong, R. Kouta
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2015)
Article
Engineering, Electrical & Electronic
Abderrahim Chariete, Mohamed Bakhouya, Ahmed Nait-Sidi-Moh, Wafaa Ait-Cheik-Bihi, Jaafar Gaber, Raed Kouta, Maxime Wack, Pascal Lorenz
INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS
(2016)
Article
Chemistry, Physical
E. Nandjou, J. -P. Poirot-Crouvezier, M. Chandesris, J. -F. Blachot, C. Bonnaud, Y. Bultel
JOURNAL OF POWER SOURCES
(2016)
Article
Chemistry, Physical
N. Noguer, D. Candusso, R. Kouta, F. Harel, W. Charon, G. Coquery
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2017)
Article
Chemistry, Physical
Latevi Placca, Raed Kouta
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2011)
Article
Chemistry, Physical
Willy Charon, Marie-Christine Iltchev, Jean-Francois Blachot
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2014)
Article
Polymer Science
Marco Maccarini, Sandrine Lyonnard, Arnaud Morin, Jean Francois Blachot, Emanuela Di Cola, Govind Prajapati, Michael Reynolds, Gerard Gebel
Article
Chemistry, Physical
Ghinwa Ouaidat, Abel Cherouat, Raed Kouta, Dominique Chamoret
Summary: This article investigates the impact of uncertainties in mechanical design parameters on contact pressure in fuel cells, utilizing a probabilistic approach to assess the effect of mechanical uncertainties on the contact pressure between GDL/MEA and GDL/BPP.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Proceedings Paper
Energy & Fuels
Joseph Al Asmar, Raed Kouta, Kabalan Chaccour, Joseph El Assad, Salah Laghrouche, Elie Eid, Maxime Wack
INTERNATIONAL CONFERENCE ON TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY -TMREES15
(2015)
Proceedings Paper
Energy & Fuels
Joseph Al Asmar, Raed Kouta, Joseph El Assad, Salah Laghrouche, Maxime Wack
INTERNATIONAL CONFERENCE ON TECHNOLOGIES AND MATERIALS FOR RENEWABLE ENERGY, ENVIRONMENT AND SUSTAINABILITY -TMREES15
(2015)
Proceedings Paper
Automation & Control Systems
Joseph Al Asmar, Raed Kouta, Salah Laghrouche, Joseph El Assad, Maxime Wack
2014 IEEE CONFERENCE ON CONTROL APPLICATIONS (CCA)
(2014)
Article
Computer Science, Information Systems
Joseph Al Asmar, Raed Kouta, Salah Laghrouche, Joseph El Assad, Maxime Wack
CYBERNETICS AND INFORMATION TECHNOLOGIES
(2014)
Proceedings Paper
Construction & Building Technology
Tilda Akiki, Gilbert Accary, Willy Charon, Raed Kouta, Marie-Christine Iltchev
2012 INTERNATIONAL CONFERENCE ON RENEWABLE ENERGIES FOR DEVELOPING COUNTRIES (REDEC)
(2012)
Proceedings Paper
Automation & Control Systems
Tilda Akiki, Gilbert Accary, Willy Charon, Raed Kouta
2012 2ND INTERNATIONAL CONFERENCE ON COMMUNICATIONS, COMPUTING AND CONTROL APPLICATIONS (CCCA)
(2012)
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)
