Durability of sulfonated polyimide membrane in humidity cycling for fuel cell applications

Kenji Miyatake*, Hiroshi Furuya, Manabu Tanaka, Masahiro Watanabe

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)


An aromatic proton conductive polymer, sulfonated polyimide copolymer membrane, was tested in humidity cycling under the conditions simulating fuel cell operation. The membrane was exposed periodically (every 2 min) to dry (nominal 0% relative humidity) and wet (100% relative humidity) at 80 °C, similar to the United States Department of Energy (US DOE) protocol for proton exchange membrane fuel cells. The membrane was durable for 10,000 cycles without mechanical failure. Post-test analyses by 1H NMR spectra and gel permeation chromatography (GPC) revealed that the membrane was hydrolyzed to some extent during the cycling test while mechanical properties and gas impermeability were only slightly deteriorated.

Original languageEnglish
Pages (from-to)74-78
Number of pages5
JournalJournal of Power Sources
Publication statusPublished - 2012 Apr 15
Externally publishedYes


  • Gas permeability
  • Humidity cycling
  • Mechanical failure
  • Membrane degradation
  • Sulfonated polyimide

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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