In:
ECS Transactions, The Electrochemical Society, Vol. 108, No. 7 ( 2022-05-20), p. 165-179
Abstract:
Improving the performance of proton exchange membrane fuel cells (PEMFCs) can help accelerate their large-scale commercial application. In this paper, an agglomerate model is proposed and developed by coupling a one-dimensional local oxygen transport model with a one-dimensional multiphase non-isothermal fuel cell sub-model to study the influences of catalyst dimension parameters (Pt radius, Pt average dispersity, carbon radius) on local oxygen transport and cell performance. And this elaborate model shows that the smaller Pt radius, carbon radius, and the higher Pt average dispersity can reduce the transport distance of oxygen molecules from the pores to the active sites, and then decrease the local resistance. Based on the above understanding, the optimum performance of the optimized cell with a Pt loading of 0.2 mg cm -2 is improved by 22%, slightly higher than the original cell with a Pt loading of 0.4 mg cm -2 , which achieves a 50% reduction in Pt loading while maintaining the cell performance. This research will give a guide for improving cell performance.
Type of Medium:
Online Resource
ISSN:
1938-5862
,
1938-6737
DOI:
10.1149/10807.0165ecst
Language:
Unknown
Publisher:
The Electrochemical Society
Publication Date:
2022
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