Semi-ordered catalyst layer with ultra-low Pt loading for proton exchange membrane fuel cells

Jialong Gao, Huawei Wang, Zihou Zhang, Ying Chen, Dong Li, Mingzheng Zhou, Maorong Chai, Yujing Li*

*此作品的通讯作者

科研成果: 期刊稿件文章同行评审

3 引用 (Scopus)

摘要

The reduction of platinum group metal (PGM) loading for proton exchange membrane fuel cells (PEMFC) is essential for their widespread deployment. The structural ordering of the catalyst layer is considered as an important means to enhance the power generation performance and hence reduce the PGM loading. In this study, we present a semi-ordered catalyst layer structure design that significantly diminishes mass transport resistance while enhancing H+ transport. The ordered micro-array (OMA) with intrinsic internal voids, establishes the vertical channels within the catalyst layer and optimizes the transport pathways for protons and oxygen. Thus, the semi-ordered catalyst layer design exhibits significantly improved MEA performance by 24 % and lower oxygen transport resistance at low loading (0.05–0.1 mgPt cm−2) compared to conventional planar catalyst layer. The multiphysics modelling demonstrates the role of vertical pore channels in the semi-ordered catalyst layer for mass transport in the catalyst layer, which can further reduce the Pt loading while maintaining high fuel cell performance.

源语言英语
文章编号234516
期刊Journal of Power Sources
606
DOI
出版状态已出版 - 30 6月 2024

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