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Article

Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells

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Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2
School of Automotive Engineering, Tongji University, Shanghai 201804, China
3
New Energy R&D Center, Weichai Power Co., Ltd., Weifang 261061, China
4
Key Laboratory of High-Performance Rubber & Products of Anhui Province, Ningguo 242300, China
*
Author to whom correspondence should be addressed.
Academic Editor: Fatemeh Razmjooei
Membranes 2022, 12(7), 645; https://doi.org/10.3390/membranes12070645
Received: 30 May 2022 / Revised: 17 June 2022 / Accepted: 20 June 2022 / Published: 23 June 2022
(This article belongs to the Special Issue Membranes in Electrochemistry Applications)
During all the assembly stages of a polymer electrolyte membrane fuel cell (PEMFC) stack, gas diffusion layers (GDLs) endure clamping loads in the through-plane direction several times. Under such complicated assembly conditions, GDLs have to deform with the changes in structure, surface roughness, pore size, etc. A comprehensive understanding of the compressive performance of GDLs at different clamping phases is crucial to the assembly process improvement of PEMFCs. Two typical clamping compression was designed and performed to get close to the actual assembly conditions of PEMFCs. The results indicate that the initial clamping compression and the magnitude of the maximum clamping load have great impacts on the segmented compressive properties of GDLs. The nonlinear compressive performance of the GDL is mainly attributed to the unique microstructural information. The rough surface morphology contributes to the initial compressive characteristics where the big strain along with the small stress occurs, and the irreversible failures such as carbon fiber breakages and adhesive failures between fibers and binders account for the hysteresis between different compression stages. Importantly, it is found that the clamping compression hardly influences the small pore distribution below 175 μm but affects the large pore distribution over 200 μm. View Full-Text
Keywords: gas diffusion layer; polymer electrolyte membrane fuel cells; clamping compression; nonlinear characteristics; mechanical failures gas diffusion layer; polymer electrolyte membrane fuel cells; clamping compression; nonlinear characteristics; mechanical failures
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MDPI and ACS Style

Chen, Y.; Zhao, J.; Jin, C.; Ke, Y.; Li, D.; Wang, Z. Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells. Membranes 2022, 12, 645. https://doi.org/10.3390/membranes12070645

AMA Style

Chen Y, Zhao J, Jin C, Ke Y, Li D, Wang Z. Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells. Membranes. 2022; 12(7):645. https://doi.org/10.3390/membranes12070645

Chicago/Turabian Style

Chen, Yanqin, Jinghui Zhao, Cuihong Jin, Yuchao Ke, Decai Li, and Zixi Wang. 2022. "Effect of Clamping Compression on the Mechanical Performance of a Carbon Paper Gas Diffusion Layer in Polymer Electrolyte Membrane Fuel Cells" Membranes 12, no. 7: 645. https://doi.org/10.3390/membranes12070645

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