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Low Pt loading for high-performance fuel cell electrodes enabled by hydrogen-bonding microporous polymer binders

Author

Listed:
  • Hongying Tang

    (Chinese Academy of Sciences
    Tianjin Normal University
    Technical University of Denmark, Elektrovej)

  • Kang Geng

    (Chinese Academy of Sciences)

  • David Aili

    (Technical University of Denmark, Elektrovej)

  • Qing Ju

    (Chinese Academy of Sciences)

  • Ji Pan

    (Soochow University)

  • Ge Chao

    (Chinese Academy of Sciences)

  • Xi Yin

    (Chinese Academy of Sciences)

  • Xiang Guo

    (Chinese Academy of Sciences)

  • Qingfeng Li

    (Technical University of Denmark, Elektrovej)

  • Nanwen Li

    (Chinese Academy of Sciences)

Abstract

A key challenge for fuel cells based on phosphoric acid doped polybenzimidazole membranes is the high Pt loading, which is required due to the low electrode performance owing to the poor mass transport and severe Pt poisoning via acid absorption on the Pt surface. Herein, these issues are well addressed by design and synthesis of effective catalyst binders based on polymers of intrinsic microporosity (PIMs) with strong hydrogen-bonding functionalities which improve phosphoric acid binding energy, and thus preferably uphold phosphoric acid in the vicinity of Pt catalyst particles to mitigate the adsorption of phosphoric acid on the Pt surface. With combination of the highly mass transport microporosity, strong hydrogen-bonds and high phosphoric acid binding energy, the tetrazole functionalized PIM binder enables an H2-O2 cell to reach a high Pt-mass specific peak power density of 3.8 W mgPt−1 at 160 °C with a low Pt loading of only 0.15 mgPt cm−2.

Suggested Citation

  • Hongying Tang & Kang Geng & David Aili & Qing Ju & Ji Pan & Ge Chao & Xi Yin & Xiang Guo & Qingfeng Li & Nanwen Li, 2022. "Low Pt loading for high-performance fuel cell electrodes enabled by hydrogen-bonding microporous polymer binders," Nature Communications, Nature, vol. 13(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34489-x
    DOI: 10.1038/s41467-022-34489-x
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    1. Katie H. Lim & Albert S. Lee & Vladimir Atanasov & Jochen Kerres & Eun Joo Park & Santosh Adhikari & Sandip Maurya & Luis Delfin Manriquez & Jiyoon Jung & Cy Fujimoto & Ivana Matanovic & Jasna Jankovi, 2022. "Protonated phosphonic acid electrodes for high power heavy-duty vehicle fuel cells," Nature Energy, Nature, vol. 7(3), pages 248-259, March.
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