Brønsted acid-base and -polybase complexes as electrolytes for fuel cells under non-humidifying conditions |
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Authors: | Hideyuki Matsuoka Masayoshi Watanabe |
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Affiliation: | Department of Chemistry and Biotechnology, Yokohama National University, 79-5 Tokiwadai, Hodogaya-ku, Yokohama 240-8501, Japan |
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Abstract: | A novel series of Brønsted acid-base complexes were prepared by the combination of 2,5-diphenyl-1,3,4-oxadiazole (DOD) with a super strong acid bis(trifluoromethane sulfonyl)imide (HTFSI) at various molar ratios. The DOD-HTFSI complexes showed high ionic conductivities and were electroactive for H2 oxidation and O2 reduction at a Pt electrode. The complexes could serve as fuel cell electrolytes under entirely non-humidifying conditions and at elevated temperatures. The concept of the DOD-HTFSI complexes was applied to a polybase, polyp-phenylene-2,5-(1,3,4-oxadiazole)] (POD), and the ion-conduction behavior of the POD-HTFSI complexes was discussed with a view to realizing anhydrous solid-state fast proton conductors. |
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Keywords: | 2 5-Diphenyl-1 3 4-oxadiazole Poly[p-phenylene-2 5-(1 3 4-oxadiazole)] Bis(trifluoromethane sulfonyl)imide Anhydrous proton conductor Fuel cell |
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