重庆大学学报2026，Vol.49Issue(1)：40-50,11.DOI:10.11835/j.issn.1000-582X.2024.229
质子交换膜燃料电池微孔层微结构力学特性分析
Mechanical properties and microstructural response of the microporous layer in PEMFCs
摘要
Abstract
The microporous layer(MPL)of proton exchange membrane fuel cells(PEMFCs)plays an important role in the transport of water,gas,heat and charge.Mechanical deformation and microstructural damage can significantly impair these transport processes.In this study,the stress-strain relationship of the MPL was experimentally determined after material fabrication and microstructural characterization.A numerical reconstruction of the MPL was then developed based on the extracted microstructural parameters,and finite element simulations were conducted to evaluate the displacement-stress distributions of carbon particles and polytetrafluoroethylene(PTFE)under different mechanical strains.Results show that mechanical loading induces substantial strain within the MPL,with the highest stress occurring at the surface,where stress concentration is most likely to form.Stress was found to increase exponentially with applied strain.At 10%strain,the maximum stress on carbon particles and PTFE was about 31.385 MPa and 14.873 MPa,respectively;when strain increased to 40%,the corresponding stresses rose to 160.03 MPa and 96.165 MPa,accompanied by a pronounced intensification of stress concentration regions.关键词
质子交换膜燃料电池/微孔层/机械应力/有限元分析Key words
proton exchange membrane fuel cell/microporous layer/mechanical stress/finite element analysis分类
信息技术与安全科学引用本文复制引用
邵轩宇,黄治平,许杰,张恒,詹志刚..质子交换膜燃料电池微孔层微结构力学特性分析[J].重庆大学学报,2026,49(1):40-50,11.基金项目
国家自然科学基金资助项目(52306270,22179103,21676207) （52306270,22179103,21676207）
广东省基础与应用基础研究资助项目(2022A1515110456).Supported by the National Natural Science Foundation of China(52306270,22179103,21676207),and Basic and Applied Basic Research Foundation of Guangdong Province(2022A1515110456). （2022A1515110456）
