Article
Electrochemistry
Haosen Xu, Shangshang Wang, Jianbo Zhang
Summary: This study explores the sensitivity of parameters and the effects of H-2 supply methods and power control sequences in the alternating hydrogen pump (AHP) method for cold start in fuel cell vehicles. The optimized AHP values triple the heating power of PEMFCs, enabling vehicle start-up from -30°C to 0°C within 30 seconds. AHP is demonstrated to be superior to state-of-the-art rapid self-heating method in terms of capability, degradation, and practical convenience.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yeonghwan Fang, Changwook Seol, Sang Moon Kim, Segeun Jang
Summary: This study investigates the correlation effect of catalyst loading and ionomer content on the performance of polymer electrolyte membrane water electrolysis (PEMWE). The effects on kinetic, ohmic, and mass transfer overpotential are estimated and analyzed. A critical ionomer concentration is proposed, and high-performance PEMWE is achieved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Soonyong So, Keun-Hwan Oh
Summary: In this study, catalyst ink was prepared using a dispersant with an HLB value of 17. The effects of ionomer-catalyst agglomerate size on ink rheological properties, CL microstructure, and electrochemical performance were investigated. The results showed that the smallest agglomerate size and low PDI were obtained with 1 wt% dispersant content, resulting in well-dispersed ink. The MEA based on the 1 wt% CL exhibited the highest performance due to increased number of channels and back pressure.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Sungyu Choi, Jiyoon Jeon, Junsu Chae, Seongmin Yuk, Dong-Hyun Lee, Gisu Doo, Dong Wook Lee, Jonghyun Hyun, Jiyun Kwen, Siyoung Q. Choi, Hee-Tak Kim
Summary: The researchers successfully fabricated a multiscale porous catalyst layer using the emulsion template method, improving the mass transport property of low Pt-loaded fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Min-Cheol Kim, Seunghwan Jo, Jaesung Jang, Yong-Soo Lee, Sang-Beom Han, Kyung-Won Park, Jung Inn Sohn
Summary: The study prepared a bifunctional catalytic metal-foam porous transport layer (CMPTL) that can serve as both an electrochemical catalyst and mass transfer, significantly reducing the total overpotential. The energy density of LABs increased by 16.7%, while the current density of PEMWE increased by 23.5 times.
APPLIED SURFACE SCIENCE
(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)
Article
Nanoscience & Nanotechnology
Junmo Koo, Heon Jun Jeong, Wonjoon Choi, Joon Hyung Shim
Summary: Platinum-carbon nanotube (CNT) catalysts were evaluated as cathode catalysts for polymer electrolyte membrane fuel cells. Pt catalysts were fabricated using atomic layer deposition on bare or O2 plasma treated CNTs. The morphology of the Pt particles differed on the two types of CNT supports, leading to differences in electrochemical and fuel cell performance. Factors other than geometric features also influenced fuel cell performance.
SCRIPTA MATERIALIA
(2023)
Article
Nanoscience & Nanotechnology
Mohamed R. Berber, Muhammad Imran, Hanako Nishino, Hiroyuki Uchida
Summary: The addition of hygroscopic silica nanoparticles to the Pt/C anode catalyst layer can greatly prolong the lifetime of a Nafion membrane in the accelerated stress test and improve the output performance at low relative humidity. It can also decrease the formation rate of H2O2 and reduce the ohmic resistance, leading to effective utilization of Pt cathode catalyst. These findings provide a rational explanation for the enhancement of PEM durability and output performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Materials Science, Multidisciplinary
Heming Liu, Xin Kang, Taifeng Zhao, Zhiyuan Zhang, Shiyu Ge, Shuqi Hu, Yuting Luo, Fengning Yang, Shao-Hai Li, Chenghua Sun, Qiangmin Yu, Hui-Ming Cheng, Bilu Liu
Summary: As an important carbon-neutral energy carrier, green hydrogen produced through water electrolysis using renewable electricity has gained global attention. Polymer electrolyte water electrolyzers (PEWEs) have the potential to play a key role in the green hydrogen market due to their superior performance. However, the slow progress in the development of the membrane electrode assembly (MEA), an essential component of PEWE, hinders the advancement of PEWEs. This review discusses recent progress in MEA materials and design strategies, focusing on cost, activity, and stability of catalysts, distribution and thickness of ionomers, and ion transport efficiency of ion exchange membranes (IEMs). The effects of all components and interlayer interfaces on ions, electrons, and mass transfer in MEA, and consequently, the performance of PEWEs are analyzed. Perspectives on MEA development through optimization of catalyst activity and IEM stability, interface contact between adjacent components, and performance evaluation methods are proposed.
SCIENCE CHINA-MATERIALS
(2022)
Article
Polymer Science
Yushi Tamaki, Kimihiko Sugiura
Summary: This study investigated the influence of Catalyst-Layer structure on Polymer Electrolyte Fuel Cell performance, especially focusing on CL thickness and electrode area. The results showed that the overpotentials of activation and diffusion increased with thicker CL, and the gas diffusivity of multilayer catalyst electrode was worse than that of a single layer MEA. Increasing electrode area also worsened the diffusion overpotential, leading to flooding/plugging phenomena.
Article
Electrochemistry
Steffen Garbe, Jonas Futter, Thomas J. Schmidt, Lorenz Gubler
Summary: The study examines a liquid water fed polymer electrolyte water electrolyzer at high temperatures using thin membranes, showing increased conversion efficiency and the possibility of higher current densities. However, there are safety limits to consider when operating at these conditions.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Hassan Moydien, Pieter Levecque, Darija Susac
Summary: This study compares titanium fibre felts and conventional carbon gas diffusion layers as cathode GDLs for PEMFCs, and finds that titanium fibre felts exhibit improved performance and higher air permeability than carbon GDLs across different thicknesses.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Review
Energy & Fuels
Tuan Linh Doan, Han Eol Lee, Syed Shabbar Hassan Shah, MinJoong Kim, Chang-Hee Kim, Hyun-Seok Cho, Taekeun Kim
Summary: Polymer electrolyte membrane water electrolysis (PEMWE) is a promising and environmentally friendly method for hydrogen production, but only contributes 4% of global hydrogen production due to economic challenges. Recent research on porous transport layers (PTL) aims to reduce costs and enhance performance of PEM water electrolysis.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Nanoscience & Nanotechnology
Qing Gong, Chenzhao Li, Yadong Liu, Jan Ilavsky, Fei Guo, Xuan Cheng, Jian Xie
Summary: The rational design of catalyst layers in a membrane electrode assembly is crucial for high-performance polymer electrolyte membrane fuel cells. This study found that the solvent composition significantly affects the pore structure and performance of the catalyst layer, with the appropriate pore structure and enlarged catalyst/ionomer interface leading to improved MEA performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Electrochemistry
Arturo Sanchez-Ramos, Jeff T. Gostick, Pablo A. Garcia-Salaberri
Summary: A model for the cathode catalyst layer was validated using experimental data, showing the impact of various factors on performance and oxygen transport resistance. The results indicate that the contributions of ionomer film and Pt/ionomer interface increase inversely with roughness factor, while the contributions of water film and water/ionomer interface increase with the ratio of geometric area to active ionomer surface area.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Electrochemistry
Masaru Sakamoto, Shinji Nohara, Kenji Miyatake, Makoto Uchida, Masahiro Watanabe, Hiroyuki Uchida
Article
Electrochemistry
Yuichi Senoo, Koji Taniguchi, Katsuyoshi Kakinuma, Makoto Uchida, Hiroyuki Uchida, Shigehito Deki, Masahiro Watanabe
ELECTROCHEMISTRY COMMUNICATIONS
(2015)
Article
Electrochemistry
Styven Lankiang, Morio Chiwata, Steve Baranton, Hiroyuki Uchida, Christophe Coutanceau
ELECTROCHIMICA ACTA
(2015)
Article
Chemistry, Physical
Morio Chiwata, Katsuyoshi Kakinuma, Mitsuru Wakisaka, Makoto Uchida, Shigehito Deki, Masahiro Watanabe, Hiroyuki Uchida
Article
Electrochemistry
Morio Chiwata, Hiroshi Yano, Satoshi Ogawa, Masahiro Watanabe, Akihiro Iiyama, Hiroyuki Uchida
Article
Electrochemistry
M. Wakisaka, S. Kobayashi, S. Morishima, Y. Hyuga, D. A. Tryk, M. Watanabe, A. Iiyama, H. Uchida
ELECTROCHEMISTRY COMMUNICATIONS
(2016)
Article
Electrochemistry
Masahiro Watanabe, Hiroshi Yano, Donald. A. Tryk, Hiroyuki Uchida
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2016)
Article
Chemistry, Multidisciplinary
G. Y. Shi, H. Yano, D. A. Tryk, M. Watanabe, A. Iiyama, H. Uchida
Article
Chemistry, Physical
Guoyu Shi, Hiroshi Yano, Donald A. Tryk, Akihiro Iiyarna, Hiroyuki Uchida
Article
Chemistry, Physical
Hiroshi Yano, Masahiro Watanabe, Akihiro Iiyama, Hiroyuki Uchida
Article
Chemistry, Physical
Yoshiyuki Ogihara, Hiroshi Yano, Masahiro Watanabe, Akihiro Iiyama, Hiroyuki Uchida
Article
Chemistry, Physical
Yoshiyuki Ogihara, Hiroshi Yano, Takahiro Matsumoto, Donald A. Tryk, Akihiro Iiyama, Hiroyuki Uchida
Editorial Material
Electrochemistry
Gunther Wittstock, Michael Eikerling, Nicolas Alonso-Vante, Miomir B. Vukomirovic, Hiroyuki Uchida
Article
Electrochemistry
Yuya Yamashita, Shunsuke Itami, Jun Takano, Katsuyoshi Kakinuma, Hiroyuki Uchida, Masahiro Watanabe, Akihiro Iiyama, Makoto Uchida
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2017)
Article
Electrochemistry
Kazuki Shimura, Hanako Nishino, Katsuyoshi Kakinuma, Manuel E. Brito, Hiroyuki Uchida
ELECTROCHIMICA ACTA
(2017)
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)