Article
Green & Sustainable Science & Technology
Zixuan Wang, Chasen Tongsh, Bowen Wang, Zhi Liu, Qing Du, Kui Jiao
Summary: This study experimentally investigates the effects of different cathode flow fields on the performance of open-cathode proton exchange membrane fuel cells (PEMFC). The results show that the cell with the metal foam flow field has the best performance, but excessive airflow and high temperature have negative effects on the cell performance.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Thermodynamics
Zhuo Zhang, Qi-yao Wang, Fan Bai, Li Chen, Wen-quan Tao
Summary: Commercial fuel cell stacks with large electrode area are used for high power output. The uniformity in-plane distribution of key parameters is important for improving cell performance. This study analyzed the in-plane distribution characteristics of a large-scale PEMFC using a three-dimensional two-fluid multiphase model, showing that gap zones near the edge affect cell performance and that coolant flow direction has a significant impact. The results provide insights for optimizing fuel cells.
Article
Chemistry, Physical
Wenjie Qi, Xu Tang, Jie Song, Zhigang Zhang, Zehao Huang, Shuaishuai Ge, Jiying Tuo, Junjie Cheng, Shengchang Guo
Summary: The twisted parallel flow field (TPFF) design presented in this study can improve the mass transfer efficiency and output performance of proton exchange membrane fuel cells (PEMFC). By changing the shape of parallelogram and the position of each vertex, TPFF enhances the oxygen transmission efficiency and alleviates flooding phenomenon.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Feng Ding, Tingting Zou, Tao Wei, Lei Chen, Xiaoping Qin, Zhigang Shao, Jianjun Yang
Summary: The proton exchange membrane (PEM) in a proton exchange membrane fuel cell (PEMFC) is susceptible to pinhole defects, which can lead to polymer decomposition, fuel cell failure, and safety issues. This study investigates the effects of pinhole size on the current density and temperature distributions of a PEMFC. The presence of hydrogen crossover through a pinhole can cause hydrogen diffusion and hydrogen oxidation reaction, leading to local reverse currents and hot spots. However, water under operation conditions can result in membrane swelling and pinhole sealing, reducing hydrogen crossover.
Article
Green & Sustainable Science & Technology
Jiawei Xu, Yuhua Wu, Shengying Xiao, Yifei Wang, Xinhai Xu
Summary: The high temperature proton exchange membrane fuel cell integrated with the methanol steam reformer is a promising technology. This study evaluates the performance of the fuel cell fed with a mixture of H2, CO, and other impurities. The results show that the presence of CH3OH with CO benefits the fuel cell performance at low current densities but aggravates CO poisoning at high current densities.
Article
Chemistry, Physical
Fang-Bor Weng, Mangaliso Menzi Dlamini, Jenn-Jiang Hwang
Summary: Fluid distribution, conduction, and heat control are crucial for fuel cell performance. Metal foam and fine mesh can solve the challenges with straight and serpentine channels. In this study, different flow field designs are compared to improve PEMFC performance. Two foam designs are studied to solve the drawbacks of metal foam caused by high water retention. The fine wire mesh performs best under specific stoichiometry while the metal foam and fine mesh have the potential to drain water droplets and show symmetric fluid flow compared to serpentine design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Junjie Zhao, Xiaoming Huang, Zhengkai Tu, Siew Hwa Chan
Summary: The study highlights the importance of carbon corrosion in the catalyst of PEMFCs and how water distribution directly influences it. By investigating the distribution of water and carbon corrosion under different working conditions, the catalyst is divided into varying levels of flooded areas, with the degree of carbon corrosion in the flooded area reaching as high as 97.76% after 100 hours. Increasing temperature increases the corrosion rate, but helps alleviate water flooding.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Yong Zhang, Shirong He, Xiaohui Jiang, Mu Xiong, Yuntao Ye, Xi Yang
Summary: A PEMFC single cell model with waveform staggered flow field is established in this study. The simulation results show that the proposed flow field design effectively solves the uneven gas concentration and cathode flooding issues, significantly improving the performance of the fuel cell.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Energy & Fuels
Qihao Deng, Yang Liu, Yu Zhou, Wenshang Chen, Zuguo Shen, Ben Chen, Zhengkai Tu
Summary: A CFD model with different flow field structures was established to analyze the heat transfer performance. The results showed that the wave flow field had the best comprehensive cooling effect at high flow velocity. In practical applications, the wave flow field demonstrated better heat transfer performance.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Thermodynamics
Fuxiang Huang, Diankai Qiu, Zhutian Xu, Linfa Peng, Xinmin Lai
Summary: This study presents an analytical model that considers local pressure losses, pressure recovery phenomena, electrochemical reactions, and liquid water to calculate the flow distribution in the stack. The investigation shows that neglecting gas consumption and two-phase flow can result in overestimation of flow maldistribution in multi-cell PEMFC stacks.
Article
Electrochemistry
Tobias Schmitt, Remi Bligny, Gael Maranzana, Ulrich Sauter
Summary: This study presents a new method for acquiring sub-second electrochemical impedance spectroscopy (EIS) on a segmented proton exchange membrane fuel cell (PEMFC). By optimizing the frequency range and characterizing all segments simultaneously, high temporally and spatially resolved features are obtained. The acquisition and postprocessing steps are decoupled, and the evolution of the transmission line model's (TLM) parameters is characterized, providing guidance for segmented EIS characterization.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Kangfu Ruan, Linlin Yang, Hai Sun, Gongquan Sun
Summary: This study proposes a new method to measure air flow distribution in high-temperature proton exchange membrane fuel cell stacks. The method involves analyzing the characteristic frequency and its correlation with air stoichiometry. Experimental results show that the method is accurate and practical.
JOURNAL OF POWER SOURCES
(2022)
Article
Energy & Fuels
Duy Khang Dang, Biao Zhou
Summary: Liquid water management is crucial for the performance and durability of proton exchange membrane fuel cells. Nature-inspired leaf-like designs with branching configurations show more efficient water management and better fuel cell performance. Studying air-liquid water transport phenomena in biomimetic flow field designs can provide insights for improving flow field designs.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Thermodynamics
Mehrdad Ghasabehi, Mehrzad Shams, Homayoon Kanani
Summary: The study focuses on a modified parallel PEMFC model, investigated through 3D multiphase computational fluid dynamics simulation to study water management and reactants transport, and explore the interactions between operating parameters. The results indicate that temperature and pressure increase can have a positive effect only with appropriate stoichiometries of fuel and air along with sufficient relative humidities.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Taiming Huang, Wei Wang, Yao Yuan, Jie Huang, Xi Chen, Jing Zhang, Xiangzhong Kong, Yan Zhang, Zhongmin Wan
Summary: Genetic algorithm was used to optimize the flow channel configuration of HT-PEMFCs, resulting in improved performance. By adjusting the widths of the anode/cathode flow channels, the diffusion rate of hydrogen and electrochemical reactions were enhanced, leading to increased output power.
Article
Engineering, Environmental
Godwin Severa, Keith Bethune, Richard Rocheleau, Scott Higgins
CHEMICAL ENGINEERING JOURNAL
(2015)
Article
Materials Science, Multidisciplinary
Benjamin D. Gould, Joseph A. Rodgers, Michael Schuette, Keith Bethune, Shaquille Louis, Richard Rocheleau, Karen Swider-Lyons
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2015)
Article
Chemistry, Physical
M. A. Rubio, K. Bethune, A. Urquia, J. St-Pierre
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2016)
Article
Electrochemistry
Tatyana V. Reshetenko, Guido Bender, Keith Bethune, Richard Rocheleau
ELECTROCHIMICA ACTA
(2012)
Article
Electrochemistry
Tatyana V. Reshetenko, Guido Bender, Keith Bethune, Richard Rocheleau
ELECTROCHIMICA ACTA
(2012)
Article
Electrochemistry
Tatyana V. Reshetenko, Guido Bender, Keith Bethune, Richard Rocheleau
ELECTROCHIMICA ACTA
(2012)
Article
Chemistry, Physical
Tatyana V. Reshetenko, Keith Bethune, Richard Rocheleau
JOURNAL OF POWER SOURCES
(2012)
Article
Chemistry, Physical
Guido Bender, Michael Angelo, Keith Bethune, Richard Rocheleau
JOURNAL OF POWER SOURCES
(2013)
Article
Chemistry, Physical
Y. Zhai, G. Bender, K. Bethune, R. Rocheleau
JOURNAL OF POWER SOURCES
(2014)
Article
Chemistry, Physical
Tatyana V. Reshetenko, Keith Bethune, Miguel A. Rubio, Richard Rocheleau
JOURNAL OF POWER SOURCES
(2014)
Article
Electrochemistry
Y. Zhai, K. Bethune, G. Bender, R. Rocheleau
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2012)
Proceedings Paper
Electrochemistry
Tatyana V. Reshetenko, Jean St-Pierre, Keith Bethune, Richard Rocheleau
POLYMER ELECTROLYTE FUEL CELLS 11
(2011)
Proceedings Paper
Electrochemistry
M. S. Angelo, M. S. Haberbusch, C. T. Nguyen, K. P. Bethune, R. E. Rocheleau
POLYMER ELECTROLYTE FUEL CELLS 11
(2011)
Proceedings Paper
Electrochemistry
Y. Zhai, K. Bethune, J. St-Pierre, R. Rocheleau
BATTERIES AND ENERGY TECHNOLOGY (GENERAL)- 219TH ECS MEETING
(2011)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)