Alkaline Stability of Anion-Conductive Ionomer Coated on a Carbon Surface

Ziyi Han, Yuki Motoishi, Tsuyohiko Fujigaya

Research output: Contribution to journalArticle


Anion-exchange membrane fuel cells (AEMFCs) are promising technologies that allow the use of nonprecious metals as catalysts because the oxidation reduction reaction at the cathode occurs readily at the high pH of AEMFCs. However, the insufficient chemical stability of the anion-conductive materials in AEMFCs currently limits their development. We studied the chemical stability of the electrolyte in the catalyst layer of AEMFCs containing cationic dimethyl polybenzimidazole (mPBI). Although degradation was observed in an mPBI membrane under alkaline conditions, mPBI coated on a carbon support showed excellent alkaline stability. Because no glass transition temperature was observed for mPBI after coating on the support, the increase of chemical stability was probably associated with the decrease of polymer flexibility.

Original languageEnglish
Pages (from-to)17134-17139
Number of pages6
JournalACS Omega
Issue number17
Publication statusPublished - Oct 22 2019

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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