Towards the understanding of proton conduction mechanism in PEMFC catalyst layer: Conductivity of adsorbed Nafion films

被引：150

作者：

Paul, Devproshad K. ^{[1
,2
]}

Fraser, Andrew ^{[1
]}

Karan, Kunal ^{[1
,2
]}

机构：

[1] Queens RMC Fuel Cell Res Ctr, Kingston, ON K7L 5L9, Canada

[2] Queens Univ, Dept Chem Engn, Kingston, ON K7L 3N6, Canada

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2011年 / 13卷 / 08期

基金：

加拿大自然科学与工程研究理事会;

关键词：

Adsorbed Nafion thin film; Proton conductivity; PEMFC; Electrochemical impedance spectroscopy; FUEL-CELLS; MEMBRANES; IMPEDANCE; TRANSPORT; MODEL;

D O I：

10.1016/j.elecom.2011.04.022

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Thin adsorbed Nafion films, representing ionomer in the PEMFC catalyst layer, were prepared by spontaneous adsorption of Nation on SiO(2) model substrate. The conductivity of the thin films was examined over a wide range of temperature and relative humidity by electrochemical impedance spectroscopy. The activation energy of proton conduction was found to be twice and three-and-half times that of Nafion 112 membrane at high RH (80%) and low RH (20%), respectively. These results suggest that the mechanism of proton transport in the PEMFC catalyst layer is different than that in the membrane. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：774 / 777

页数：4

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