Journal
CHEMICAL PHYSICS LETTERS
Volume 402, Issue 4-6, Pages 324-328Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2004.12.042
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Anhydrous proton conducting material for polymer electrolyte membrane fuel cell (PEFC) was prepared by the mixing of zwitterionic-type molecular solid 3-pyridinesulfonic acid (PS) and organic acid methylenediphosphonic acid (MP). As a result, PS molecule, which has sulfonic acid and pyridine group in its structure, showed the proton conductivity of 4 x 10(-5) S cm(-1) at 160 degreesC under anhydrous condition. Surprisingly, by the mixing of MP to PS material, the PS-MP composite material exhibited a conductivity of 2 X 10(-3) S cm(-1). Moreover, the conductivity of PS-MP composite material did not decrease under the heating at 160 degreesC for 50 h. (C) 2004 Elsevier B.V. All rights reserved.
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