Cross-linked polybenzimidazole membranes for high temperature proton exchange membrane fuel cells with dichloromethyl phosphinic acid as a cross-linker

被引：65

作者：

Noy, Pernille ^{[1
]}

Li, Qingfeng ^{[1
]}

Pan, Chao ^{[1
]}

Bjerrurn, Niels J. ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

来源：

POLYMERS FOR ADVANCED TECHNOLOGIES | 2008年 / 19卷 / 09期

关键词：

polybenzimidazole; cross-link; acid doping; proton exchange membrane; fuel cell;

D O I：

10.1002/pat.1123

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Phosphoric acid doped polybenzimidazole (PBI) membranes have been covalently cross-linked with dichloromethyl phosphinic acid (DCMP). FT-IR measurements showed new bands originating from bonds between the hydrogen bearing nitrogen in the imidazole group of PBI and the CH2 group in DCMP. The produced cross-linked membranes show increased mechanical strength, making it possible to achieve higher phosphoric acid doping levels and therefore higher proton conductivity. Oxidative stability is significantly improved and thermal stability is sufficient in a temperature range of up to 250 degrees C, i.e. within the temperature range of operation of PBI-based fuel cells. Copyright (C) 2008 John Wiley & Sons, Ltd.

引用

页码：1270 / 1275

页数：6