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A high conductivity Cs2.5H0.5PMo12O40/polybenzimidazole (PBI)/H3PO4 composite membrane for proton-exchange membrane fuel cells operating at high temperature

Lookup NU author(s): Dr Minquaing Li, Emeritus Professor Keith Scott

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Abstract

A high conductivity composite proton-exchange membrane Cs2.5H0.5PMo12O40 (CsPOM)/polybenzimidazole (PBI) for use in hydrogen proton-exchange fuel cells has been prepared. The CsPOM composite membrane is insoluble in water. The composite membrane doped with H3PO4 showed high-proton conductivity (>0.15 S cm-1) and good thermal stability. 31P NMR analysis has suggested the formation of a chemical bond between the CsPOM and PBI in the composite membrane. The performance of the membrane in a high-temperature proton-exchange membrane fuel cell (PEMFC) fueled with hydrogen was better than that with a phosphoric acid-doped PBI membrane under the same conditions and at temperatures greater than 150 °C. The CsPOM/PBI composite would appear to be a promising material for high-temperature PEMFC applications. Crown Copyright © 2008.

Publication metadata

Author(s): Li M-Q, Shao Z-G, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2008

Volume: 183

Issue: 1

Pages: 69-75

Print publication date: 15/08/2008

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier B.V.

URL: http://dx.doi.org/10.1016/j.jpowsour.2008.04.093

DOI: 10.1016/j.jpowsour.2008.04.093

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