Correlation between electrochemical performance degradation and catalyst structural parameters on polymer electrolyte membrane fuel cell

Nanotechnology Reviews

article

Yunqi Li¹  Danping Xiong¹  Yuwei Liu¹  Mingtao Liu¹  Jinzhang Liu³  Chen Liang⁴  Congxin Li⁴  Jun Xu⁶ 

[1] Department of Automotive Engineering, School of Transportation Science and Engineering, Beihang University;Vehicle Energy & Safety Laboratory (VESL), Beihang University;School of Materials Science and Engineering, Beihang University;Beijing New Energy Vehicle Technology Innovation Center Co.;Beijing Automotive Research Center Co. Ltd;Department of Mechanical Engineering and Engineering Science, The University of North Carolina at Charlotte, United States of America;Vehicle Energy & Safety Laboratory (VESL), North Carolina Motorsports and Automotive Research Center, The University of North Carolina at Charlotte, United States of America

关键词: polymer electrolyte membrane fuel cells;    electrochemical surface area loss;    carbon corrosion;    catalyst structural parameters;    catalysts performance degradation;   

DOI  :  10.1515/ntrev-2019-0044

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

The catalysts performance degradation is a crucial issue in decay of the polymer electrolyte membrane fuel cell (PEMFC). The effect of Nafion content, dispersity of Pt nanoparticles and selected types of carbon support on the degradation of electrochemical surface area (ECSA) and double layer capacitance (DLC) were experimentally discussed by accelerated stress test (AST). The catalyst with 20wt% Nafion content exhibited better catalyst performance. i.e ., the less DLC and ECSA degradation during AST. Catalysts with well Pt dispersity showed superior %ECSA (the percentage change of ECSA) retention. The heat-treated catalysts exhibited the lowest ECSA and DLC degradation rate due to the larger Pt particle and high carbon corrosion resistance. Moreover, a multi-order model describing the correlation between ECSA and DLC degradation was proposed, providing a vital reference for quantitatively investigating ECSA and DLC degradation in the catalysts with different catalysts structural parameters.

【 授权许可】

CC BY