Reinforced Polyphenylene Ionomer Membranes Exhibiting High Fuel Cell Performance and Mechanical Durability

Junpei Miyake, Takayuki Watanabe, Haruhiko Shintani, Yasushi Sugawara, Makoto Uchida, Kenji Miyatake*

*この研究の対応する著者

研究成果: Article査読

9 被引用数 (Scopus)

抄録

We report on the preparation of reinforced membranes (SPP-QP-PE, where SPP stands for sulfonated polyphenylene), composed of an in-house proton-conductive polyphenylene ionomer (SPP-QP) and a flexible porous polyethylene (PE) mechanical support layer. By applying the push coating method, dense, uniform, transparent, and thin SPP-QP-PE membranes were obtainable. The use of SPP-QP with higher ion exchange capacity induced very high proton conductivity of SPP-QP-PE, leading to high fuel cell performance even at low humidified conditions (e.g., at 80 °C and 30% relative humidity), which had not been attainable with the existing reinforced aromatic ionomer membranes. The flexible porous PE substrate improved the mechanical toughness of the membranes; the elongation at break increased by a factor of 7.1 for SPP-QP-PE compared to that with the bare SPP-QP membrane, leading to mechanical durability at least 3850 wet-dry cycles under practical fuel cell operating conditions (the United States Department of Energy protocol). Overall, the reinforced aromatic ionomer membranes, SPP-QP-PE with balanced proton conductivity, mechanical toughness, and gas impermeability, functioned well in fuel cells with high performance and durability.

本文言語English
ページ(範囲)81-88
ページ数8
ジャーナルACS Materials Au
1
1
DOI
出版ステータスPublished - 2021 9月 8

ASJC Scopus subject areas

  • 生体材料
  • 電子材料、光学材料、および磁性材料
  • 材料化学
  • ポリマーおよびプラスチック

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