A polybenzimidazole/sulfonated graphite oxide composite membrane for high temperature polymer electrolyte membrane fuel cells

被引：175

作者：

Xu, Chenxi ^{[1
]}

Cao, Yuancheng ^{[1
]}

Kumar, Ravi ^{[1
]}

Wu, Xu ^{[1
]}

Wang, Xu ^{[1
]}

Scott, Keith ^{[1
]}

机构：

[1] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2011年 / 21卷 / 30期

基金：

英国工程与自然科学研究理事会;

关键词：

GRAPHENE OXIDE; CONDUCTIVITY; PERFORMANCE; OPERATION;

D O I：

10.1039/c1jm11159k

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：

Polybenzimidazole/graphite oxide (PBI/GO) and PBI/sulfonated graphite oxide composite membranes were prepared for high temperature polymer electrolyte membrane fuel cells. The membranes were loaded with phosphoric acid to provide suitable proton conductivity. The PBI/GO and PBI/SGO membranes were characterized by XRD which showed that the d-spacing reflection (001) of SGO in PBI matrix was shifted from 2 theta = 11 degrees, meaning that the PBI molecules were intercalated into the SGO layers during the membrane preparation process. A low acid loading level reduced the free acid in the membranes which avoided water loss and thus conductivity loss. The ionic conductivities of the PBI/ GO and PBI/ SGO membranes, with low acid loading, were 0.027 S cm(-1) and 0.052 S cm(-1) at 175 degrees C and 0% humidity. Fuel cell performance with SGO/PBI membranes gave a maximum power density of 600 mW cm(-2) at 175 degrees C.

引用

页码：11359 / 11364

页数：6

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