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Oriented intergrowth of the catalyst layer in membrane electrode assembly for alkaline water electrolysis

Author

Listed:
  • Lei Wan

    (Tsinghua University)

  • Maobin Pang

    (Tsinghua University)

  • Junfa Le

    (Tsinghua University)

  • Ziang Xu

    (Tsinghua University)

  • Hangyu Zhou

    (Tsinghua University)

  • Qin Xu

    (Tsinghua University)

  • Baoguo Wang

    (Tsinghua University)

Abstract

The application of membrane electrode assemblies is considered a promising approach for increasing the energy efficiency of conventional alkaline water electrolysis. However, previous investigations have mostly focused on improving membrane conductivity and electrocatalyst activity. This study reports an all-in-one membrane electrode assembly obtained by de novo design. The introduction of a porous membrane readily enables the oriented intergrowth of ordered catalyst layers using solvothermal methods, leading to the formation of an all-in-one MEA for alkaline water electrolysis. This all-in-one MEA features ordered catalyst layers with large surface areas, a low-tortuosity pore structure, integrated catalyst layer/membrane interfaces, and a well-ordered OH- transfer channel. Owing to this design, a high current density of 1000 mA cm−2 is obtained at 1.57 V in 30 wt% KOH, resulting in a 94% energy efficiency. This work highlights the prospects of all-in-one membrane electrode assemblies in designing next-generation high-performance alkaline water electrolysis.

Suggested Citation

  • Lei Wan & Maobin Pang & Junfa Le & Ziang Xu & Hangyu Zhou & Qin Xu & Baoguo Wang, 2022. "Oriented intergrowth of the catalyst layer in membrane electrode assembly for alkaline water electrolysis," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
  • Handle: RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-35603-9
    DOI: 10.1038/s41467-022-35603-9
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    References listed on IDEAS

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    1. Jiantao Fan & Ming Chen & Zhiliang Zhao & Zhen Zhang & Siyu Ye & Shaoyi Xu & Haijiang Wang & Hui Li, 2021. "Bridging the gap between highly active oxygen reduction reaction catalysts and effective catalyst layers for proton exchange membrane fuel cells," Nature Energy, Nature, vol. 6(5), pages 475-486, May.
    2. Aaron Hodges & Anh Linh Hoang & George Tsekouras & Klaudia Wagner & Chong-Yong Lee & Gerhard F. Swiegers & Gordon G. Wallace, 2022. "A high-performance capillary-fed electrolysis cell promises more cost-competitive renewable hydrogen," Nature Communications, Nature, vol. 13(1), pages 1-11, December.
    3. Huan Yang & Lanqian Gong & Hongming Wang & Chungli Dong & Junlei Wang & Kai Qi & Hongfang Liu & Xingpeng Guo & Bao Yu Xia, 2020. "Preparation of nickel-iron hydroxides by microorganism corrosion for efficient oxygen evolution," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
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    1. Zheng-Jie Chen & Jiuyi Dong & Jiajing Wu & Qiting Shao & Na Luo & Minwei Xu & Yuanmiao Sun & Yongbing Tang & Jing Peng & Hui-Ming Cheng, 2023. "Acidic enol electrooxidation-coupled hydrogen production with ampere-level current density," Nature Communications, Nature, vol. 14(1), pages 1-9, December.

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