Effect of ionomer volume fraction within cathode catalyst layer on performance of a PEMFC

Ruijiao Yu, Hang Guo, Hao Chen and Fang Ye

Energy, 2023, vol. 277, issue C

Abstract: Ionomer is the important component of catalyst layer, the content affects catalyst layer properties and cell performance. In this work, a three dimensional fuel cell model having agglomerate is established to explore the influence of constant value and non-uniform distribution on cell performance. The results show that more ionomer increases cell performance in ohmic loss region but reduces the performance in concentration loss region. Higher ionomer content significantly improves the homogeneity of reaction rate distribution along thickness direction. Ionomer content has a great effect on reaction rate around inlet region having sufficient reactants. The content decreasing along main flow direction is conducive to cell performance improvement compared with the results obtained from the other two directions. The content reducing from under land to channel and the content stepped distribution along thickness direction all can improve cell performance. The influence of stepped non-uniform distribution with two segments or three segments on cell performance is different. Ionomer distribution corresponding to maximum current density at 0.4 V is three segments along main gas flow direction, the content is 41.461 vol%, 37.310 vol%, 33.513 vol% from inlet to outlet. The current density can be improved by 0.577%.

Keywords: Ionomer content; Catalyst layer; Cell performance; Proton exchange membrane fuel cell (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:277:y:2023:i:c:s0360544223010253

DOI: 10.1016/j.energy.2023.127631

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