期刊
ELECTROCHIMICA ACTA
卷 55, 期 24, 页码 7404-7412出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.06.067
关键词
Ionomer content; Membrane electrode assembly; MEA; Catalyst-layer structure; Polymer electrolyte fuel cell; PEFC
资金
- U.S Department of Energy, Office of Hydrogen, Fuel Cells & Infrastructure Technology and Office of Basic Energy Sciences-Chemical Sciences
Nafion (R) ionomer content of the cathode catalyst-layer of a polymer electrolyte fuel cell (PEFC), made by the decal hot pressing method, has been investigated for its effect on performance and structure of the membrane electrode assembly (MEA) Varying Nafion (R) content was shown to have an effect on performance within the entire range of polarization curves (i e kinetic, ohmic. and mass-transport regions) as well as on the structure AFM analysis shows the effect of Nation on the dispersion of carbon aggregates Further analysis using TEM demonstrates the effect of Nation on both the dispersion of carbon aggregates and the distribution and thickness of the Nation ionomer films surrounding the catalyst/carbon aggregates The MEA structure change correlates well with the MEA performance on both kinetics and mass-transport region The determining factors on the performance of MEA are the interfacial zone (between the ionomer and catalyst particle), the dispersion of catalyst/carbon aggregates and the distribution/thickness of Nation films An optimized Nafion (R) content in the range of 27 +/- 6 wt.% for the cathode was determined for an E-TEK 20% Pt(3)Cr/C catalyst at a loading of 0 20 mg Pt/cm(2) (C) 2010 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据