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收稿日期:
2024-04-10
修回日期:
2024-07-03
出版日期:
2024-07-10
通讯作者:
郭航
作者简介:
于瑞佼(1992—),女,博士,博士后,yuruijiao@bjut.edu.cn
基金资助:
Ruijiao YU(), Hang GUO(), Fang YE, Hao CHEN
Received:
2024-04-10
Revised:
2024-07-03
Online:
2024-07-10
Contact:
Hang GUO
摘要:
气体扩散层是质子交换膜燃料电池的关键部件,在电池内支撑和保护质子交换膜和催化剂层,并且为电子传导和气体输运提供通道。孔隙率作为扩散层主要参数,其大小影响扩散层特性,最终影响电池性能。所以,为获得较有利的孔隙率,本文建立三维全电池结块模型,计算定值,沿不同方向阶梯型变化孔隙率对电池性能的影响,并且计算不同电压下对应最佳的孔隙率值。结果表明,增大孔隙率可明显提升浓差极化区电池性能,但是降低欧姆极化区性能。沿流动方向孔隙率增加可改善电池性能,但是孔隙率变化幅度不宜过大,从脊下到流道下孔隙增加可提升电池性能。不同电压下使得电流密度最大对应的孔隙率不同,且随电压增加而降低,0.2 V时电流密度可提升5.28%。
中图分类号:
于瑞佼, 郭航, 叶芳, 陈浩. 扩散层孔隙率对燃料电池性能影响研究[J]. 化工学报, DOI: 10.11949/0438-1157.20240400.
Ruijiao YU, Hang GUO, Fang YE, Hao CHEN. Study of gas diffusion layer porosity affecting fuel cell performance[J]. CIESC Journal, DOI: 10.11949/0438-1157.20240400.
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