Analysis of membrane electrode assembly performance degradation in fixed power generation fuel cell stack
MA Qing
LV Qingqing
CAI Xin
XU Yumeng
SHEN Yan
HE Dandan
LEI Pengfei
Abstract：This article conducted a durability test of 19 000 hours on a fixed fuel cell stack for hydrogen production from natural gas reforming,and studied the electrochemical characteristics,microstructure changes,and catalyst composition changes of the membrane electrode before and after attenuation.The research results show that after durability testing,the voltage degradation of the stack membrane electrode is 27.6%,the output power of the stack is significantly reduced,and the anti CO ability is reduced.The proton exchange membrane becomes thinner,and the surface catalyst is lost.The content of Pt and Ru in the catalyst significantly decreases,and the catalyst layer cracks and collapses.The particle size of the catalyst increased from 5～6 nm to 8～10 nm,and catalyst agglomerates with a diameter of approximately 100 nm appeared.Catalyst loss and microstructure changes are important reasons for the electrochemical performance degradation of fuel cells.
Keywords：fixed power generationfuel cellsmembrane electrode assemblymicroscopic structurecatalyst
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 3-8 )