Effect of Surface Ion Conductivity of Anion Exchange Membranes on Fuel Cell Performance

Masanori Hara, Taro Kimura, Takuya Nakamura, Manai Shimada, Hideaki Ono, Shigefumi Shimada, Kenji Miyatake, Makoto Uchida, Junji Inukai, Masahiro Watanabe

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Anion conductivity at the surfaces of two anion-exchange membranes (AEMs), quaternized ammonium poly(arylene ether) multiblock copolymer (QPE-bl-3) and quaternized ammonium poly(arylene perfluoro-alkylene) copolymer (QPAF-1), synthesized by our group was investigated using current-sensing atomic force microscopy under purified air at various relative humidities. The anion-conducting spots were distributed inhomogeneously on the surface of QPE-bl-3, and the total areas of the anion-conducting spots and the current at each spot increased with humidity. The anion-conductive areas on QPAF-1 were found on the entire surface even at a low humidity. Distribution of the anion-conducting spots on the membrane was found to directly affect the performance of an AEM fuel cell.

Original languageEnglish
Pages (from-to)9557-9565
Number of pages9
JournalLangmuir
Volume32
Issue number37
DOIs
Publication statusPublished - 2016 Sep 20
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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