Experiment on assembly contact pressure of PEM water electrolyzer
1.Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan， Hubei 430070, China; 2. Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan， Hubei 430070, China; 3. Clean Energy Research Centre, Department of Chemical and Biological Engineering, University of British Columbia, Vancouver V6T 1Z3, Canada
Abstract：Because the pressure distribution on the membrane electrode assembly（MEA）had great influence on the performance of proton exchange membrane water electrolyzer（PEMWE）, the influence of assembly scheme on the pressure distribution on the MEA was investigated. The MEA was replaced by pressure-sensitive paper, and the PEMWE was assembled by different assembly schemes. The pressure distribution on pressure-sensitive paper was analyzed by experimental observation and image processing, and the influence of assembly scheme on the pressure distribution on the MEA was obtained. The experimental results show that with the increasing of clamping pressure, the pressure on the MEA is gradually increased and is more evenly distributed, while the excessive pressure can lead to the damage of cathode diffusion layer. The scheme 5 is the best assembly scheme to ensure the sealing effect and pressure distribution of MEA.
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2021, Vol. 42 
