Modification of polymer electrolyte membranes for DMFCs using Pd films formed by sputtering

被引：95

作者：

Yoon, SR ^{[1
]}

Hwang, GH ^{[1
]}

Cho, WI ^{[1
]}

Oh, IH ^{[1
]}

Hong, SA ^{[1
]}

Ha, HY ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 130650, South Korea

来源：

JOURNAL OF POWER SOURCES | 2002年 / 106卷 / 1-2期

关键词：

direct methanol fuel cell; polymer electrolyte membrane; palladium layer; sputtering; methanol crossover;

D O I：

10.1016/S0378-7753(01)01048-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Composite polymer electrolyte membranes were fabricated by depositing Pd films on the surface of Nafion(TM) membranes by sputtering, and the modified membranes were investigated for their morphologies, methanol permeabilities, protonic conductivities and performances for direct methanol fuel cells (DMFCs). The Pd film acted as a barrier to methanol crossover, but at the same time it also reduced proton conductivity. Though both the methanol permeability and the protonic conductivity through the modified membranes decreased with increasing g Pd thickness, the cell performances were almost independent of the Pd thickness. The effects of methanol concentration on the protonic conductivity and the cell performance were also investigated. And, the role of Pd Elms in DMFCs is discussed in some detail. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：215 / 223

页数：9

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