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 × 10-5 S cm -1 at 160°C under anhydrous condition. Surprisingly, by the mixing of MP to PS material, the PS-MP composite material exhibited a conductivity of 2 × 10-3 S cm-1. Moreover, the conductivity of PS-MP composite material did not decrease under the heating at 160°C for 50 h.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry