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Turing-type nanochannel membranes with extrinsic ion transport pathways for high-efficiency osmotic energy harvesting

Author

Listed:
  • Kehan Zou

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Haoyang Ling

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Qingchen Wang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Congcong Zhu

    (Chinese Academy of Sciences)

  • Zhehua Zhang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Dehua Huang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Ke Li

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Yuge Wu

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Weiwen Xin

    (Chinese Academy of Sciences)

  • Xiang-Yu Kong

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Lei Jiang

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

  • Liping Wen

    (Chinese Academy of Sciences
    University of Chinese Academy of Sciences)

Abstract

Two-dimensional (2D) nanofluidic channels with confined transport pathways and abundant surface functional groups have been extensively investigated to achieve osmotic energy harvesting. However, solely relying on intrinsic interlayer channels results in insufficient permeability, thereby limiting the output power densities, which poses a significant challenge to the widespread application of these materials. Herein, we present a nanoconfined sacrificial template (NST) strategy to create a crafted channel structure, termed as Turing-type nanochannels, within the membrane. Extrinsic interlaced channels are formed between the lamellae using copper hydroxide nanowires as sacrificial templates. These Turing-type nanochannels significantly increase transport pathways and functional areas, resulting in a 23% enhancement in ionic current while maintaining a cation selectivity of 0.91. The output power density of the Turing-type nanochannel membrane increases from 3.9 to 5.9 W m−2 and remains stable for at least 120 hours. This membrane exhibits enhanced applicability in real saltwater environments across China, achieving output power densities of 7.7 W m−2 in natural seawater and 9.8 W m−2 in salt-lake brine. This work demonstrates the promising potential of the Turing-channel design for nanoconfined ionic transport in the energy conversion field.

Suggested Citation

  • Kehan Zou & Haoyang Ling & Qingchen Wang & Congcong Zhu & Zhehua Zhang & Dehua Huang & Ke Li & Yuge Wu & Weiwen Xin & Xiang-Yu Kong & Lei Jiang & Liping Wen, 2024. "Turing-type nanochannel membranes with extrinsic ion transport pathways for high-efficiency osmotic energy harvesting," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-54622-2
    DOI: 10.1038/s41467-024-54622-2
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    References listed on IDEAS

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