A Quaternary Polybenzimidazole Membrane for Intermediate Temperature Polymer Electrolyte Membrane Fuel Cells

C. Xu, K. Scott, Qingfeng Li, J. Yang, X. Wu

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A quaternary ammonium polybenzimidazole (QPBI) membrane was synthesized for applications in intermediate temperature (100–200 °C) hydrogen fuel cells. The QPBI membrane was imbibed with phosphoric acid to provide suitable proton conductivity. The proton conductivity of the membrane was 0.051 S cm–1 at 150 °C with the PA acid loading level of 3.5 PRU (amount of H3PO4 per repeat unit of polymer QPBI). The QPBI membrane was characterized in terms of composition, structure and morphology by NMR, FTIR, SEM, and EDX. The fuel cell performance with the membrane gave peak power densities of 440 and 240 mW cm–2 using oxygen and air, respectively, at 175 °C.
Original languageEnglish
JournalFuel Cells
Volume13
Issue number2
Pages (from-to)118-125
ISSN1615-6846
DOIs
Publication statusPublished - 2013

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