考虑催化层中气液态水影响的PEMFC微观模型

doi:10.3866/PKU.WHXB201301082

Abstract

Abstract:

The performance of proton exchange membrane fuel cell (PEMFC) was simulated with a microstructure lattice model of the catalyst layer, including the effect of liquid and gaseous water. Comparisons of simulations where liquid water was and was not factored in were carried out, demonstrating the necessity of including liquid and gaseous water effects in the catalyst microstructure. The distribution of the degree of liquid water saturation, oxygen concentration, and rate of oxygen reduction with catalyst layer thickness were calculated, and factors affecting these distributions were investigated. Water‘flooding’in the catalyst layer had a significant influence on PEMFC performance. Higher catalyst layer porosity facilitated water drainage and was beneficial to PEMFC performance.

Key words: Catalyst layer, Proton exchange membrane fuel cell, Lattice model, Liquid water transport, Liquid water saturation

CHEN Qiu-Xiang, ZHANG Jie-Jing, WANG Yu-Xin. Micro-Modelling of PEMFC Taking Account of Gaseous and Liquid Water inside the Catalyst Layer[J]. Acta Phys. -Chim. Sin. 2013, 29(03), 559-568. doi: 10.3866/PKU.WHXB201301082

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Micro-Modelling of PEMFC Taking Account of Gaseous and Liquid Water inside the Catalyst Layer

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