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<p>Aqueous Zn ion batteries are advantageous in terms of safety and cost, while their sustainable applications are usually impeded by dendrite growth and interfacial side reactions. Here, we present the development of an electrochemically driven artificial solid-state electrolyte interphase, utilizing a metal surface coupling agent phosphate ester as a protective layer for Zn negative electrodes. Upon cycling, the protective layer in situ transforms into a hybrid phase enriched with well dispersed Zn<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub> nanocrystals. This transformation ensures a uniform Zn<sup>2+</sup> flux, effectively suppresses dendrite growth, and mitigates side reactions. In addition, such protective layer ensures Zn electrode stable plating/stripping performance for 1500 h at 10 mA cm<sup>−2</sup> and 1 mAh cm<sup>−2</sup>, while pouch cells coupled with NaV<sub>3</sub>O<sub>8</sub>·1.5H<sub>2</sub>O deliver ampere-hour level capacity. Beyond that, its robust adhesion and flexibility enable the Zn electrode to maintain good performance under a variety of harsh conditions. This approach provides valuable insights into the advancement of Zn metal batteries.</p>

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An electrochemically driven hybrid interphase enabling stable versatile zinc metal electrodes for aqueous zinc batteries

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月23日

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  • Dingtao Ma,
  • Fan Li,
  • Kefeng Ouyang,
  • Qiuting Chen,
  • Jinlai Zhao,
  • Minfeng Chen,
  • Ming Yang,
  • Yanyi Wang,
  • Jizhang Chen,
  • Hongwei Mi,
  • Chuanxin He,
  • Peixin Zhang

摘要

Aqueous Zn ion batteries are advantageous in terms of safety and cost, while their sustainable applications are usually impeded by dendrite growth and interfacial side reactions. Here, we present the development of an electrochemically driven artificial solid-state electrolyte interphase, utilizing a metal surface coupling agent phosphate ester as a protective layer for Zn negative electrodes. Upon cycling, the protective layer in situ transforms into a hybrid phase enriched with well dispersed Zn3(PO4)2 nanocrystals. This transformation ensures a uniform Zn2+ flux, effectively suppresses dendrite growth, and mitigates side reactions. In addition, such protective layer ensures Zn electrode stable plating/stripping performance for 1500 h at 10 mA cm−2 and 1 mAh cm−2, while pouch cells coupled with NaV3O8·1.5H2O deliver ampere-hour level capacity. Beyond that, its robust adhesion and flexibility enable the Zn electrode to maintain good performance under a variety of harsh conditions. This approach provides valuable insights into the advancement of Zn metal batteries.