XPS analysis of the degradation of Nafion

被引：90

作者：

Schulze, M ^{[1
]}

Lorenz, M ^{[1
]}

Wagner, N ^{[1
]}

Gülzow, E ^{[1
]}

机构：

[1] Deutsch Zentrum Luft & Raumfahrt, Inst Tech Thermodynam, D-70569 Stuttgart, Germany

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1999年 / 365卷 / 1-3期

关键词：

D O I：

10.1007/s002160051454

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Tn polymer membrane fuel cells (PEFC) Nafion(R) is frequently used as electrolyte membrane. Nafion(R) is an ion exchange polymer based on a PTFE backbone with added sulfonic acid groups. Before using in PEFC the Nafion(R) membrane is cleaned by a chemical pretreatment. The influence of this chemical pretreatment of Nafion(R) membranes was investigated with XPS measurements as well as the influence of electrochemical stressing. The Nafion(R) membrane will be decomposed during XPS measurements. X-ray exposure as well as ion etching induces a degradation of Nafion(R). The change is related to a disintegration of the basis polymer PTFE as well as the sulfonic acid groups containing side chains. The decomposition of the side chains is faster than that of the PTFE backbone.

引用

页码：106 / 113

页数：8

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