Electrochemical durability of gas diffusion layer under simulated proton exchange membrane fuel cell conditions

被引：86

作者：

Chen, Guobao ^{[1
,2
]}

Zhang, Huamin ^{[1
]}

Ma, Haipeng ^{[1
]}

Zhong, Hexiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Dalian Inst Chem Phys, Key Mat Lab PEMFCs, Dalian 116023, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 19期

基金：

国家高技术研究发展计划(863计划);

关键词：

Gas diffusion layer; Polymer electrolyte membrane fuel cell; Electrochemical durability; Carbon corrosion; COMPOSITE CARBON-BLACK; MICRO-POROUS LAYER; CATALYST LAYER; CATHODE; CORROSION;

D O I：

10.1016/j.ijhydene.2009.07.085

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

An effective ex-situ method for characterizing electrochemical durability of a gas diffusion layer (GDL) under simulated polymer electrolyte membrane fuel cell (PEMFC) conditions is reported in this article. Electrochemical oxidation of the GDLs are studied following potentiostatic treatments up to 96 h holding at potentials from 1.0 to 1.4 V (vs.SCE) in 0.5 mol L-1 H2SO4. From the analysis of morphology, resistance, gas permeability and contact angle, the characteristics of the fresh GDL and the oxidized GDLs are compared. It is found that the maximum power densities of the fuel cells with the oxidized GDLs hold at 1.2 and 1.4 V (vs.SCE) for 96 h decreased 178 and 486 mW cm(-2), respectively. The electrochemical impedance spectra measured at 1500 mA cm(-2) are also presented and they reveal that the ohmic resistance, charge-transfer and mass-transfer resistances of the fuel cell changed significantly due to corrosion at high potential. (c) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.

引用

页码：8185 / 8192

页数：8

共 26 条

[1]

Influence of Nafion loading in the catalyst layer of gas-diffusion electrodes for PEFC [J].