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Accelerated deprotonation with a hydroxy-silicon alkali solid for rechargeable zinc-air batteries

Author

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  • Yaobin Wang

    (Nanjing University of Information Science and Technology (NUIST))

  • Xinlei Ge

    (Nanjing University of Information Science and Technology (NUIST))

  • Qian Lu

    (Nanjing University of Information Science and Technology (NUIST))

  • Wenjun Bai

    (Southern University of Science and Technology)

  • Caichao Ye

    (Southern University of Science and Technology)

  • Zongping Shao

    (Curtin University)

  • Yunfei Bu

    (Nanjing University of Information Science and Technology (NUIST))

Abstract

Transition metal oxides are promising electrocatalysts for zinc-air batteries, yet surface reconstruction caused by the adsorbate evolution mechanism, which induces zinc-ion battery behavior in the oxygen evolution reaction, leads to poor cycling performance. In this study, we propose a lattice oxygen mechanism involving proton acceptors to overcome the poor performance of the battery in the OER process. We introduce a stable solid base, hydroxy BaCaSiO4, onto the surfaces of PrBa0.5Ca0.5Co2O5+δ perovskite nanofibers with a one-step exsolution strategy. The HO-Si sites on the hydroxy BaCaSiO4 significantly accelerate proton transfer from the OH* adsorbed on PrBa0.5Ca0.5Co2O5+δ during the OER process. As a proof of concept, a rechargeable zinc-air battery assembled with this composite electrocatalyst is stable in an alkaline environment for over 150 hours at 5 mA cm–2 during galvanostatic charge/discharge tests. Our findings open new avenues for designing efficient OER electrocatalysts for rechargeable zinc-air batteries.

Suggested Citation

  • Yaobin Wang & Xinlei Ge & Qian Lu & Wenjun Bai & Caichao Ye & Zongping Shao & Yunfei Bu, 2023. "Accelerated deprotonation with a hydroxy-silicon alkali solid for rechargeable zinc-air batteries," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42728-y
    DOI: 10.1038/s41467-023-42728-y
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    References listed on IDEAS

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    1. Zhen-Feng Huang & Jiajia Song & Yonghua Du & Shibo Xi & Shuo Dou & Jean Marie Vianney Nsanzimana & Cheng Wang & Zhichuan J. Xu & Xin Wang, 2019. "Chemical and structural origin of lattice oxygen oxidation in Co–Zn oxyhydroxide oxygen evolution electrocatalysts," Nature Energy, Nature, vol. 4(4), pages 329-338, April.
    2. Alexis Grimaud & Kevin J. May & Christopher E. Carlton & Yueh-Lin Lee & Marcel Risch & Wesley T. Hong & Jigang Zhou & Yang Shao-Horn, 2013. "Double perovskites as a family of highly active catalysts for oxygen evolution in alkaline solution," Nature Communications, Nature, vol. 4(1), pages 1-7, December.
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