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<p>Zinc-based aqueous batteries offer environmental and safety advantages, and the Earth’s abundant zinc reserves make them promising low-cost alternatives to lithium-ion batteries. Current zinc-based batteries face challenges such as dendrite growth and corrosion, posing significant obstacles to their cycling stability. In this study, we synthesized a Bi<sub>2</sub>O<sub>3</sub> coating using bismuth nitrate as the bismuth source via a hydrothermal method and applied it to zinc-ion batteries to achieve dendrite-free cycling. The presence of the Bi<sub>2</sub>O<sub>3</sub> layer prevents direct contact between the electrolyte and the metal surface, thereby slowing corrosion and providing a uniform zinc plating/stripping process to suppress dendrite growth. The full cell composed of this electrode and manganese oxide delivered a high specific capacity of 120 mAh g<sup>− 1</sup> at a current density of 1&#xa0;A g<sup>− 1</sup>, and cycled stably for 1300 cycles, significantly improving the cycle stability of the battery compared to the bare Zn electrode.</p>

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Hydrothermal synthesis of Bi2O3 for zinc anode coating achieves highly stable cycling in aqueous zinc-ion batteries

  • 期刊论文

  • 发表日期：

    2026年2月23日

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  • Ning Wang,
  • Yanheng Yin,
  • Mingqiang Li,
  • Mingyang Cao

摘要

Zinc-based aqueous batteries offer environmental and safety advantages, and the Earth’s abundant zinc reserves make them promising low-cost alternatives to lithium-ion batteries. Current zinc-based batteries face challenges such as dendrite growth and corrosion, posing significant obstacles to their cycling stability. In this study, we synthesized a Bi2O3 coating using bismuth nitrate as the bismuth source via a hydrothermal method and applied it to zinc-ion batteries to achieve dendrite-free cycling. The presence of the Bi2O3 layer prevents direct contact between the electrolyte and the metal surface, thereby slowing corrosion and providing a uniform zinc plating/stripping process to suppress dendrite growth. The full cell composed of this electrode and manganese oxide delivered a high specific capacity of 120 mAh g− 1 at a current density of 1 A g− 1, and cycled stably for 1300 cycles, significantly improving the cycle stability of the battery compared to the bare Zn electrode.