质子交换膜燃料电池微孔层微结构力学特性分析

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中图分类号：TM911.4 文献标志码：A 文章编号：1000-582X（2026）01-040-11

Abstract： The microporous layer （MPL） proton exchange membrane fuel cells （PEMFCs） plays an important rolein the transport water，gas，heat charge.Mechanical demation microstructural damage can significantly impair these transport processs.In this study，the stres-strain relationship the MPL was experimentallydetermined after material fabrication microstructural characterization.A numerical reconstruction the MPL was then developed basedon theextracted microstructural parameters， finite element simulations were conducted to evaluate the displacement-stress distributions carbon particles polytetrafluoroethylene （PTFE）under different mechanical strains.Results show that mechanical loading induces substantial strain withinthe MPL，with the highest stress occuring atthe surface，where stressconcentrationis most likely to m. Stress was found to increase exponentially with applied strain. At 10% strain， the maximum stress on carbon particles PTFE was about 31.385MPa 14.873MPa ，respectively;when strain increased to 40% ，the corresponding stresses rose to 160.03 MPa 96.165 MPa，accompanied by a pronounced intensification stress concentration regions.

words： proton exchange membrane fuel cel！ microporous layer; mechanical stress; finite element analysis

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