考虑催化层中气液态水影响的PEMFC微观模型

引用本文: 陈秋香, 张洁婧, 王宇新. 考虑催化层中气液态水影响的PEMFC微观模型[J]. 物理化学学报, 2013, 29(03): 559-568. doi: 10.3866/PKU.WHXB201301082 shu

Citation: 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 Physico-Chimica Sinica, 2013, 29(03): 559-568. doi: 10.3866/PKU.WHXB201301082 shu

考虑催化层中气液态水影响的PEMFC微观模型

基金项目:
国家自然科学基金(20606025)资助项目 (20606025)

摘要:

在考虑气、液两相水影响的条件下基于微观格点催化层模型对聚合物膜燃料电池(PEMFC)性能进行了模拟. 通过氧浓度分布和反应速率分布的比较, 说明了同时考虑催化层中气、液两相水影响的必要性. 模拟分析了液态水体积分数、氧气浓度及氧还原反应速率等在阴极催化层中的分布情况和影响因素. 考察了不同程度‘水淹’情况下的电池性能以及催化层孔隙率对水传递和电池性能的影响. 结果显示, 催化层中‘水淹’程度对电池性能有显著影响. 催化层中较大的孔隙率便于其中水的排出, 从而有利于提高电池性能.

关键词:

English

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

1.
1 State Key Laboratory of Chemical Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, P. R. China;
2 School of Life Sciences, Jilin Agricultural University, Changchun 130118, P. R. China
Received Date: 31 October 2012
Available Online: 25 February 2013
Fund Project:
国家自然科学基金(20606025)资助项目

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:

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

考虑催化层中气液态水影响的PEMFC微观模型

English

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

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

考虑催化层中气液态水影响的PEMFC微观模型

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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