Development of PEM Electrolyzer Stack and Electrochemical Performance Study on Different Operating Conditions

Proton exchange membrane water electrolysis (PEMWE) is regarded as one of the most suitable technologies for integrating with renewable energy sources due to its fast response, high efficiency, and compact structure, and its products are carbon-free and can be stored as energy carriers. However, cur...

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Published in2024 3rd International Conference on Energy and Electrical Power Systems (ICEEPS) pp. 410 - 417
Main Authors Ye, Kequan, Zhou, Zheng, Wang, Qing, Song, Jiazhen, Zhang, Hao, Zhao, Yao, Kang, Huaichao, Hu, Xiaoyu, Hu, Mingruo, Jiang, Fengjing
Format Conference Proceeding
LanguageEnglish
Published IEEE 14.07.2024
Subjects
Current density
Electrochemical processes
energy conversion
Fluctuations
Hydrogen
hydrogen production
PEM
Power system dynamics
Protons
Renewable energy sources
stack development
Testing
water electrolysis
Water heating
Water resources
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Summary:Proton exchange membrane water electrolysis (PEMWE) is regarded as one of the most suitable technologies for integrating with renewable energy sources due to its fast response, high efficiency, and compact structure, and its products are carbon-free and can be stored as energy carriers. However, current research predominantly concentrates on optimizing components within a single cell, with relatively little focus on the design of a whole PEM electrolyzer stack. This study presents the complete development process of a PEM electrolyzer stack containing 3 cells and performs electrochemical tests under a variety of operational parameters. The results indicate that higher temperatures can reduce activation, ohmic, and mass transfer losses, thereby enhancing the performance of the electrolyzer. Moreover, the performance of the electrolyzer is influenced by the coupling of water flow rate and temperature. It is manifested that at low current density, high flow rates bring more heat from the test bench into the stack, which improves the stack performance, while at high current density, low flow rates offer better bubble removal, resulting in better performance. The findings suggest that the operating parameters, particularly the water flow rate, should be chosen properly and adjusted as the current changes.
DOI:10.1109/ICEEPS62542.2024.10693148