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

Ziyi Han, Yuki Motoishi, Tsuyohiko Fujigaya

    Research output: Contribution to journalArticlepeer-review

    Abstract

    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
    Volume4
    Issue number17
    DOIs
    Publication statusPublished - Oct 22 2019

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Chemical Engineering(all)

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