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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 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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