电池2025，Vol.55Issue(6)：1285-1293,9.DOI:10.19535/j.1001-1579.2025.06.010
PEMFC阴极催化层的团聚体模型与扩散模拟
Agglomerate model and diffusion simulation of cathode catalyst layer in PEMFC
摘要
Abstract
Liquid water produced by electrochemical reactions in proton exchange membrane fuel cells(PEMFC)occupies catalyst layer(CL)pores,hindering oxygen diffusion and severely degrading cell performance.To enhance CL oxygen transport capability,a stochastic reconstruction method is adopted to establish CL agglomerate models,the lattice Boltzmann method(LBM)is employed to simulate the coupled effects of structural parameters such as porosity,carbon carrier diameter and ionomer thickness,as well as liquid water saturation on oxygen diffusion.Increasing CL porosity elevates internal oxygen concentration,but the enhancement effect diminishes when exceeds 0.5.Larger carbon carriers facilitate oxygen diffusion,yet oxygen concentration growth slows when exceed 30 nm.The average oxygen concentration in CL first increases and then decreases with the ionomer-to-carbon mass ratio(I/C ratio).Elevated liquid water saturation consistently reduces oxygen concentration in CL.关键词
质子交换膜燃料电池(PEMFC)/阴极催化层/团聚体模型/格子玻尔兹曼/氧气扩散Key words
proton exchange membrane fuel cell(PEMFC)/cathode catalyst layer/aggregation model/lattice Boltzmann/oxygen diffusion分类
信息技术与安全科学引用本文复制引用
秦帅昌,苏丹丹,聂旭亮,张帆..PEMFC阴极催化层的团聚体模型与扩散模拟[J].电池,2025,55(6):1285-1293,9.基金项目
教育部"春晖计划"合作科研项目(202200397),河北大学高层次人才科研启动项目(521100222037),河北大学大学生创新创业训练项目(202410075059X) （202200397）
