Article
Chemistry, Physical
Satoshi Sakaida, Yuuri Takahashi, Kotaro Tanaka, Mitsuru Konno
Summary: To improve the performance of polymer electrolyte fuel cells under high current density operation, a novel gas diffusion layer (GDL) with a wettability distribution in the thickness direction was proposed. The results showed that the optimized surface treatment of the GDL could reduce water accumulation and improve cell performance.
JOURNAL OF POWER SOURCES
(2022)
Article
Thermodynamics
In Seop Lim, Byeonghyun Kang, Jin Young Park, Min Soo Kim
Summary: This study aims to improve the performance of polymer electrolyte membrane fuel cells in low humidity conditions by modifying the gas diffusion layer with HfO2 deposition. Among the different deposition cycles of HfO2, Hf_25 showed the highest peak power due to better water management and lower resistances in both low and high humidity conditions compared to Hf_50, Hf_100, and Hf_200.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Review
Chemistry, Physical
Yange Yang, Xiangyang Zhou, Bing Li, Cunman Zhang
Summary: PEMFCs have become the most attractive power supply units for both stationary and mobile applications. The gas diffusion layer is critical for the operation and design characteristics of PEMFCs, with the microporous layer considered a key variable for mass transfer. However, there is still a lack of special review to summarize recent progress in MPL materials and design.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
C. Pacheco, R. Barbosa, L. C. Ordonez, J. Sierra, B. Escobar
Summary: This research presents a novel design of a millimeter-sized air-breathing proton exchange membrane fuel cell, with performance tests showing high power density and specific power density. The method involved sequential deposition of elements in layers and analysis of current collector position using computational fluid dynamics (CFD).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Jared Beshai, Thomas DiSorbo, Jacob Hutfles, Jacob Segil, Richard F. ff Weir, John Pellegrino
Summary: This study presents the key characteristics of implementing cellulose acetate (CA) coatings on carbon cloth used as a fuel diffusion layer in aqueous fuel-fed cells, and demonstrates their functionality. The results show that these coatings enhance aqueous solution permeation and adhesion properties, leading to a two-fold increase in maximum power generation in alkaline DGFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Thermodynamics
Yaghoub Ira, Younes Bakhshan, Jamshid Khorshidimalahmadi
Summary: This study used the Lattice Boltzmann method to investigate the dynamic water transport in the gas diffusion layer (GDL) of polymer electrolyte membrane fuel cell (PEMFC). The study found that the location and thickness of the hydrophilic layer and microporous layer (MPL) have significant effects on water saturation level and time required to reach steady-state. Moreover, the study showed that adjusting the thickness and position of these layers can effectively reduce liquid water saturation and shorten the time to reach steady-state.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY
(2022)
Article
Chemistry, Physical
Satoshi Sakaida, Yutaka Tabe, Kotaro Tanaka, Mitsuru Konno
Summary: This study investigated water transport in a novel gas diffusion layer (GDL) with hydrophilic-hydrophobic patterns. It was found that water motion in hydrophilic GDL could be reproduced by a scale model, and computational load could be reduced by using Capillary numbers (Ca) similar to 10(-3). Simulation with Ca similar to 10(-3) showed that a GDL with a straight region of contact angle 50 degrees minimized water accumulation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Siddharth Komini Babu, Thomas O'Brien, Michael J. Workman, Mahlon Wilson, Rangachary Mukundan, Rod Borup
Summary: The corrosion of fuel cell components introduces contaminants that accelerate ionomer degradation, decreasing fuel cell durability. Altering gas diffusion layer wettability can affect cation contaminant transport, with the addition of a hydrophobic layer significantly suppressing contaminant transport and improving fuel cell performance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
J. P. Owejan, S. G. Goebel
Summary: This paper proposes a fuel cell architecture designed for continuous manufacturing, aiming to improve stack design by integrating all components into a rolled good. Experimental results show that a porous rib cathode flow field has performance advantages under certain operating conditions.
JOURNAL OF POWER SOURCES
(2021)
Article
Energy & Fuels
Guozhuo Wang, Yoshio Utaka, Shixue Wang
Summary: This study aimed to improve the cold start characteristics of PEFCs by applying patterned wettability to its MPL and GDL. Experimental results showed that the dual H-MPL and H-GDL exhibited the best performance for liquid exclusion and quick water movement in a membrane electrode assembly.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Xiao-Fang Zhang, Yu-Ting Liu, Hongyan Song, Ting-Ting Yao, Qingfeng Liu, Gang-Ping Wu
Summary: This study developed a novel self-humidifying gas diffusion layer (GDL) that improves the performance of proton exchange membrane fuel cells (PEMFC) under low-humidity conditions. The GDL contains a single-walled carbon nanotube (SWCNT) nonwoven layer, which significantly enhances the water retention capacity of the membrane electrode assembly (MEA) and improves low-humidity performance. The structure design of the GDL provides an effective strategy for optimizing self-humidifying PEMFC control.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Energy & Fuels
Robert Herrendorfer, Magali Cochet, Jurgen O. Schumacher
Summary: Evaporative cooling based on HPILs modified GDLs in proton exchange membrane fuel cells has been studied through a numerical model. The model reveals that the majority of water vapor leaves the cell via AGFC and the transport to the cathode side is limited by the membrane.
Article
Thermodynamics
Zhonghao Zhang, Mengdi Guo, Zhonghao Yu, Siyue Yao, Jin Wang, Diankai Qiu, Linfa Peng
Summary: This study proposes a novel cooperative design for the proton exchange membrane unitized regenerative fuel cell, which combines an interdigitated flow field on bipolar plate and a hydrophilic-hydrophobic alternative gas diffusion layer to improve mass transfer under both working modes. The optimized structure shows significant progress in performance, with an increase in current density by 11.5% under FC mode and 4.8% under WE mode.
Article
Thermodynamics
Ruijiao Yu, Hang Guo, Hao Chen, Fang Ye
Summary: Gas diffusion layer and catalyst layer are crucial components in a proton exchange membrane fuel cell. The parameters of gas diffusion layer porosity, platinum, carbon, and ionomer inside the catalyst layer significantly affect the cell's output performance. These parameters have a strong interaction with each other due to the correlation between mass transfer and electrochemical reaction rate. By optimizing these parameters simultaneously using a 3D agglomerate model, the cell's performance can be improved, and the current density can be increased by at least 9.1%.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Review
Chemistry, Physical
Qitong Shi, Cong Feng, Pingwen Ming, Fumin Tang, Cunman Zhang
Summary: This paper reviews the effects of compression on gas diffusion layers in fuel cells, emphasizing the need for comprehensive investigation on how compression affects the pores and bulk characteristics of the gas diffusion layer.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
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)