Proton-conducting polymer membranes in fuel cells - humidification aspects

被引：56

作者：

Andreaus, B ^{[1
]}

Scherer, GG ^{[1
]}

机构：

[1] Paul Scherrer Inst, Res Dept Gen Energy, Lab Electrochem, CH-5232 Villigen, Switzerland

来源：

SOLID STATE IONICS | 2004年 / 168卷 / 3-4期

关键词：

polymer electrolyte fuel cell; humidification; water balance; electrochemical impedance spectroscopy;

D O I：

10.1016/j.ssi.2003.01.001

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：

The characteristics of water balance in the solid polymer electrolyte and its effects on the performance of a polymer electrolyte fuel cell are investigated by means of electrochemical impedance spectroscopy (EIS) and current pulse method (CPM). At high current densities, the water content on the anode side of the electrolyte decreases due to electroosmotic drag and the limited backtransport properties of the polymer. This results in a higher membrane resistance as well as in an increased anode overpotential due to a loss in active surface. We also describe some first means to overcome these problems. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：311 / 320

页数：10

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