Review
Chemistry, Physical
Shiyi Wang, Adam Z. Weber, Xiong Peng
Summary: This review highlights recent progress on high-performing PEM-URFCs, focusing on electrode engineering, key components, and operating approaches that consider realistic conditions. The study also discusses key components of a membrane electrode assembly (MEA), including the catalyst layer, diffusion media, and membrane, which require different optimization strategies.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
L. Padilla Urbina, J. Liu, N. Semagina, M. Secanell
Summary: Inkjet printing is a feasible technique for the fabrication of electrode in unitized regenerative fuel cells (URFCs) and the study of optimal ionomer and catalyst loading. A physical mixture of Pt, IrOx, and Nafion ionomer was directly inkjet printed on a Nafion membrane to create bifunctional oxygen electrodes with varying loading for a URFC. The results show that the optimal electrode requires low ionomer loading and significantly less IrOx catalyst than platinum.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Noor ul Hassan, Prabhu Ganesan, Aaron A. Lando, William E. Mustain, Hector R. Colon-Mercado
Summary: Anion exchange membrane unitized regenerative fuel cells (AEM-URFCs) are a promising technology for energy storage and electricity production, but their efficiency is limited by the kinetics of the bifunctional oxygen electrode. This study advances the efficiency of the oxygen electrode by using new electrocatalysts, achieving high round trip efficiency and the highest performance reported to date in AEM-URFCs.
JOURNAL OF POWER SOURCES
(2022)
Article
Electrochemistry
Sadhasivam Thangarasu, Ho-Young Jung, Jae-Hyung Wee, Yoong Ahm Kim, Sung-Hee Roh
Summary: This study investigated the development of a new type of bipolar plate using cost-effective materials of carbon and lead with polypropylene polymer for fuel cell systems. The C:Pb bipolar plate showed improved electrical properties and water contact angle behavior compared to traditional carbon bipolar plates. It also exhibited enhanced electrochemical stability and corrosion resistance, highlighting its potential for practical applications and further enhancements through modification of carbon structures and inclusion of nanostructured lead materials.
ELECTROCHIMICA ACTA
(2021)
Article
Green & Sustainable Science & Technology
A. Rochaa, R. B. Ferreira, D. S. Falcaoa, A. M. F. R. Pinto
Summary: This study compares the performance of different bipolar plates and gas diffusion layers in a unitized regenerative fuel cell. The results show that carbon materials perform better in the cathode, while titanium materials are still required in the anode. Additionally, optimizing the operating conditions of the URFC can improve its efficiency.
Article
Chemistry, Multidisciplinary
Chanmin Jo, Yoongu Lim, Dae Jun Moon, Seungryul Yoo, Dong Chan Seok, Seon Yeop Jung, Seunghun Jung, Ho-Young Jung, Uk Sim
Summary: The weight reduction of bipolar plates is crucial for commercializing unitized regenerative fuel cells (URFCs). To achieve this, we used Pb/C composite powder as a cost-effective primary material, consisting of low-density graphite and lead. Different lead-carbon weight ratios were investigated to fabricate the bipolar plates, and their specific surface area, porosity, microstructure characteristics, conductivity, wettability, and electrochemical properties were studied and evaluated.
FRONTIERS IN CHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Ahyoun Lim, Hui-Yun Jeong, Youngjoon Lim, Jin Young Kim, Hee Young Park, Jong Hyun Jang, Yung-Eun Sung, Jong Min Kim, Hyun S. Park
Summary: This study presents a high-performance amphiphilic Ti PTL suitable for PEM-URFCs, with alternating hydrophobic and hydrophilic channels to achieve excellent performance in both FC and EC modes by changing the surface polarity. The results demonstrate a significant improvement in performance in both FC and EC modes with the amphiphilic PTL.
Article
Chemistry, Physical
Ahyoun Lim, Ju Sung Lee, Suji Lee, So Young Lee, Hyoung-juhn Kim, Sung Jong Yoo, Jong Hyun Jang, Yung-Eun Sung, Hyun S. Park
Summary: In this study, the water flux of the anode and cathode electrodes is systematically controlled by manipulating the relative humidity of the supplied gas and altering the selection of the electrode in amphiphilic membrane electrode assembly. By investigating the operation factors of URFC, a high round trip efficiency of 51 % (@ 0.4 A cm(-2)) was achieved with only 0.65 mg((Pt+Ir)) cm(-2) of the noble catalyst.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Cheoulwoo Oh, Man Ho Han, Young-Jin Ko, Jun Sik Cho, Min Wook Pin, Peter Strasser, Jae-Young Choi, Hansung Kim, Chang Hyuck Choi, Woong Hee Lee, Hyung-Suk Oh
Summary: This study synthesized a Pt-Ni alloy catalyst to improve the durability of anion exchange membrane-based unitized regenerative fuel cells (AEM-URFCs) and revealed the underlying mechanism.
ADVANCED ENERGY MATERIALS
(2023)
Article
Green & Sustainable Science & Technology
Hang Guo, Jia Song, Fang Ye, M. A. Chong Fang
Summary: The oxygen side flow channel structures have a significant influence on the dynamic response of relevant parameters during the operation mode switching procedures of a unitized regenerative fuel cell. The study compared the influence of eight oxygen-side channels on the mode switching process and found that the required time for parameters to reach a stable state in the fuel cell mode is longer when using orientational flow channels. Additionally, different flow channel structures affect the time required to stabilize each parameter during mode switching, but do not change the characteristics of the stable state mode.
Review
Environmental Studies
Teresa Maria Gulotta, Roberta Salomone, Francesco Lanuzza, Giuseppe Saija, Giovanni Mondello, Giuseppe Ioppolo
Summary: Unitized Regenerative Fuel Cell (URFC) is a promising green hydrogen technology for clean energy production, but further research is needed to make it more attractive across various sectors. The analysis of Life Cycle Assessment (LCA) and Life Cycle Costing (LCC) studies on URFCs using proton exchange membrane (PEM) devices reveals varying environmental and economic impacts, highlighting the need for increased transparency and harmonization in these assessments.
ENVIRONMENTAL IMPACT ASSESSMENT REVIEW
(2022)
Article
Chemistry, Physical
Shaolan Mo, Chun Jin, Feng Wang, Chen Wen, Nan Wang, Lei Feng, Jingying Bai, Jingjun Liu
Summary: The study developed bifunctional oxygen catalysts with double active sites, showing higher activity and stability compared to commercial catalysts. The strong particle-to-particle interaction between PtCoW and neighboring Ir, along with the formed IrO2 parallel to Ir epitaxial structure, were the main reasons for the enhanced performance.
ACS APPLIED ENERGY MATERIALS
(2021)
Review
Chemistry, Analytical
Dusan Mladenovic, Ana Mladenovic, Diogo M. F. Santos, Ayse B. Yurtcan, Scepan Miljanic, Slavko Mentus, Biljana Sljukic
Summary: Among various alternatives, hydrogen energy and its use in regenerative fuel cells is a promising option. However, the development of suitable and efficient electrocatalysts poses challenges due to the high cost and limited availability of platinum-group metals. In this review, the focus is on the recent advances in bifunctional catalysts based on transition metal oxides (TMOs) for oxygen reduction and evolution in alkaline media. The review highlights the need for unified parameters to compare the effectiveness of different electrocatalysts and discusses the promising alternatives by comparing the performance of TMOs with precious metal catalysts.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Qi Yin, Suyun Liu, Xian-Zhu Fu, Xian-Zong Wang, Jing-Li Luo
Summary: The passivation behaviors of titanium in various solution acidities in proton exchange membrane fuel cell simulated environments were investigated. The results revealed that there is a critical pH value for initiating the self-passivation of titanium, which was verified using a mathematical method based on potentiodynamic polarization curve analysis. The semiconductor type of the passive film changed from n-type to bipolar type and then to p-type as the pH increased, as explained by an n/p junction model. Additionally, the relationship between passive film thickness and pH aligned with the prediction of the point defect model.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Pengxin Dong, Zhangzhe Li, Sheng Feng, Zelin Wu, Quanliang Cao, Liang Li, Qi Chen, Xiaotao Han
Summary: This study utilized electromagnetic forming to fabricate titanium bipolar plates for proton exchange membrane fuel cells, optimizing the dynamic forming process through a simulation model. The results demonstrated the feasibility of EMF in producing high-quality titanium BPPs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Electrochemistry
Taro Kinumoto, Hiromi Nishihira, Miki Matsuoka, Naoki Eguchi, Tomoki Tsumura, Masahiro Toyoda
Article
Chemistry, Physical
Taro Kinumoto, Yoshinori Sou, Kohei Ono, Mild Matsuoka, Yasuhiko Arai, Tomoki Tsumura, Masahiro Toyoda
JOURNAL OF POWER SOURCES
(2015)
Article
Chemistry, Multidisciplinary
Taro Kinumoto, Takuya Matsumura, Koki Yamaguchi, Miki Matsuoka, Tomoki Tsumura, Masahiro Toyoda
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2015)
Article
Chemistry, Physical
Pan-pan Chang, Kazuki Matsumura, Cheng-yang Wang, Taro Kinumoto, Tomoki Tsumura, Ming-ming Chen, Masahiro Toyoda
Article
Chemistry, Physical
Taro Kinumoto, Kohei Ono, Makoto Eto, Kazuki Matsumura, Miki Matsuoka, Tomoki Tsumura, Masahiro Toyoda
Article
Electrochemistry
Panpan Chang, Chengyang Wang, Taro Kinumoto, Tomoki Tsumura, Mingming Chen, Masahiro Toyoda
Article
Chemistry, Physical
Pan-pan Chang, Cheng-yang Wang, Taro Kinumoto, Tomoki Tsumura, Ming-ming Chen, Masahiro Toyoda
Article
Chemistry, Physical
Panpan Chang, Kazuki Matsumura, Jizong Zhang, Jie Qi, Chengyang Wang, Taro Kinumoto, Tomoki Tsumura, Mingming Chen, Masahiro Toyoda
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Article
Chemistry, Physical
Pierre-Yves Olu, Eiko Yokomizo, Taro Kinumoto
Summary: In this study, the crystallization mechanism of bismuth ruthenate pyrochlore (BRO) in a hot oxygen-saturated alkaline reactor was investigated, and a dissolution-recrystallization mechanism was proposed. BRO was successfully grown onto bismuth titanate pyrochlore (BTO) seed nanoparticles. The resulting material exhibited metallic electrical conductivity and improved activity and durability compared to unsupported BRO pyrochlore catalysts.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Kazuki Matsumura, Taro Kinumoto, Tomoki Tsumura, Masahiro Toyoda
Proceedings Paper
Chemistry, Physical
Taro Kinumoto, Takuya Matsumura, Haruka Miyoshi, Miki Matsuoka, Yasuhiko Arai, Tomoki Tsumura, Masahiro Toyoda
GENERAL STUDENT POSTER SESSION
(2017)
Proceedings Paper
Chemistry, Physical
Taro Kinumoto, Makoto Eto, Kohei Ono, Miki Matsuoka, Tomoki Tsumura, Masahiro Toyoda
GENERAL STUDENT POSTER SESSION
(2017)
Proceedings Paper
Electrochemistry
T. Kinumoto, M. Ikeyama, M. Matsuoka, T. Tsumura, M. Toyoda
POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16)
(2016)
Proceedings Paper
Electrochemistry
Y. Nako, T. Sonoda, T. Itoh, T. Kinumoto
POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16)
(2016)
Proceedings Paper
Electrochemistry
Taro Kinumoto, Sawaka Kitayama, Miki Matsuoka, Tomoki Tsumura, Masahiro Toyoda
POLYMER ELECTROLYTE FUEL CELLS 14
(2014)
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)
