Homogeneous coating of ionomer on electrocatalyst assisted by polybenzimidazole as an adhesive layer and its effect on fuel cell performance

Zehui Yang, Tsuyohiko Fujigaya, Naotoshi Nakashima

    研究成果: Contribution to journalArticle査読

    26 被引用数 (Scopus)

    抄録

    The fabrication of homogeneous ionomer distribution in fuel cell catalyst layers is necessary and important to improve the platinum utilization as well as the power density. Here, we focus on the effect of poly[2,2′-(2,6-pyridine)-5,5′-bibenzimidazole] (PyPBI) wrapped on multi-walled carbon nanotubes (MWNTs) for anchoring Nafion ionomer to the electrocatalyst, in which PyPBI functions as the binding sites for platinum nanoparticles (Pt-NPs) used as a catalyst. Based on the result using a control composite without having PyPBI, a strong interaction of the Nafion onto the PyPBI layer is recognized. Importantly, we find that the membrane-electrode assembly (MEA) shows a much higher maximum power density than that of the MEA without PyPBI. A homogeneous coating of Nafion on the electrocatalyst using the PyPBI forms a long-range network of the ionomer, leading to an improved Pt-NP utilization efficiency as well as an enhanced power density of the MEA.

    本文言語英語
    ページ(範囲)175-181
    ページ数7
    ジャーナルJournal of Power Sources
    300
    DOI
    出版ステータス出版済み - 12 30 2015

    All Science Journal Classification (ASJC) codes

    • 再生可能エネルギー、持続可能性、環境
    • エネルギー工学および電力技術
    • 物理化学および理論化学
    • 電子工学および電気工学

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