Double-layer ionomer membrane for improving fuel cell performance

Takashi Mochizuki, Makoto Uchida, Hiroyuki Uchida, Masahiro Watanabe, Kenji Miyatake

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A double-layer ionomer membrane, thin-layer Nafion (perfluorinated sulfonic acid polymer) on a sulfonated aromatic block copolymer (SPK-bl-1), was prepared for improving fuel cell performance. Each component of the double-layer membrane showed similar phase-separated morphologies to those of the original membranes. A fuel cell with the double-layer membrane exhibited lower ohmic resistance and higher cathode performance than those with the original SPK-bl-1 membrane despite their comparable water uptake and proton conductivity. Detailed electrochemical analyses of fuel cell data suggested that the thin Nafion interlayer contributed to improving the interfacial contact between the SPK-bl-1 membrane and the cathode catalyst layer and to mitigating excessive drying of the membrane. The results provide new insight on designing high-performance fuel cells with nonfluorinated ionomer membranes such as sulfonated aromatic polymers.

Original languageEnglish
Pages (from-to)13894-13899
Number of pages6
JournalACS Applied Materials and Interfaces
Volume6
Issue number16
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • cathode
  • double-layer membranes
  • fuel cells
  • proton exchange membranes

ASJC Scopus subject areas

  • Materials Science(all)

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