Proton conducting acid-base mixed materials under water-free condition

Masanori Yamada, Itaru Honma

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)


In recent years, a lot of attentions have been paid for a development of water-free polymer electrolyte membranes fuel cells (PEMFC) at intermediate temperatures (above 100°C) because of many technological advantages of higher temperature operation. However, the proton conductivity of conventional polymer membranes under water-free condition is usually very low and the polymeric membranes are not stable at higher temperatures. So, the development of non-hydrous proton conducting membrane under water-free condition has been a state of the art issue in the advanced PEMFC technology. In this study, non-hydrous protonic conducting material was prepared by the mixing of acidic surfactant of mono-dodecylphosphate (MDP) and organic base of benzimidazole (BnIm). The proton conductivity and thermal stability of MDP-BnIm mixed material increased with the mixing ratio of BnIm. Maximum proton conductivity of MDP-BnIm mixed material (BnIm mixing ratio of 200 wt.%. vs. MDP) was found to be 1 × 10-3 S cm-1 at 150°C under water-free condition.

Original languageEnglish
Pages (from-to)2411-2415
Number of pages5
JournalElectrochimica Acta
Issue number17
Publication statusPublished - 2003 Jul 15


  • Acid-base mixed material
  • Polymer electrolyte
  • Polymer electrolyte membrane fuel cells (PEMFC)
  • Proton conductivity
  • Water-free condition


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