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Zincophilic CuO as electron sponge to facilitate dendrite-free zinc-based flow battery

Author

Listed:
  • Jin Seong Cha

    (Korea Institute of Energy Research (KIER)
    Korea University)

  • Sanghyeon Park

    (Korea Institute of Energy Research (KIER)
    Korea Advanced Institute of Science and Technology)

  • Noh-Uk Seo

    (Korea Institute of Energy Research (KIER)
    Yonsei University)

  • Yun-Chan Kang

    (Korea University)

  • Chan-Woo Lee

    (Korea Institute of Energy Research (KIER)
    Korea Institute of Energy Research (KIER))

  • Jung Hoon Yang

    (Korea Institute of Energy Research (KIER))

Abstract

Zinc (Zn)-based batteries have been persistently challenged by the critical issue of inhomogeneous zinc deposition/stripping process on substrate surface. Herein, we reveal that zinc electrodeposition behaviors dramatically improved through the introduction of highly zincophilic copper oxide nanoparticles (CuO NPs). Strong electronic redistribution between Zn and CuO explains the high Zn affinity on CuO, with negligible nucleation overpotential. Additionally, CuO exhibits remarkable electron-accepting and -donating capabilities in electron-rich and electron-deficient environments, resembling a sponge. This ‘Electron Sponge’ effect emerges from stable Zn-O bonding in CuO, enhancing electron duality in the Zn-O bond region. This unique strategy is pivotal in mitigating dendritic growth, fostering dendrite-free zinc-based flow batteries with enhanced rate performance and cyclability. It presents significant performance with not only high energy density (180 Wh L−1) but also the long cycle stability (> 2500 cycles) at high current density (140 mA cm−2).

Suggested Citation

  • Jin Seong Cha & Sanghyeon Park & Noh-Uk Seo & Yun-Chan Kang & Chan-Woo Lee & Jung Hoon Yang, 2025. "Zincophilic CuO as electron sponge to facilitate dendrite-free zinc-based flow battery," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-56011-9
    DOI: 10.1038/s41467-025-56011-9
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    References listed on IDEAS

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    1. Fang Wan & Linlin Zhang & Xi Dai & Xinyu Wang & Zhiqiang Niu & Jun Chen, 2018. "Aqueous rechargeable zinc/sodium vanadate batteries with enhanced performance from simultaneous insertion of dual carriers," Nature Communications, Nature, vol. 9(1), pages 1-11, December.
    2. Gaurav Assat & Jean-Marie Tarascon, 2018. "Fundamental understanding and practical challenges of anionic redox activity in Li-ion batteries," Nature Energy, Nature, vol. 3(5), pages 373-386, May.
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