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<p>Aqueous zinc-ion batteries (AZBs) are considered safer and potential substitutes for large-scale energy storage and conversion devices. The conventional vanadium pentoxide (V<sub>2</sub>O<sub>5</sub>) cathode material has attracted widespread attention duo to its typical layered structure and high theoretical capacity. Unfortunately, it still suffers from severe structural collapse, sluggish diffusion dynamics, and fast capacity fading. Herein, we rationally designed and prepared trivalent Al<sup>3+</sup> and H<sub>2</sub>O co-intercalated V<sub>2</sub>O<sub>5</sub> (AlVO), in which Al<sup>3+</sup> plays a “pillar” role and forms strong Al–O bonds, while H<sub>2</sub>O acts as the “lubricant”, synergistically maintaining the structural stability and accelerating the diffusion of zinc ions. The Zn//AlVO battery is found to possess not only an impressive reversible capacity of 390.7 mAh·g<sup>−1</sup> at 0.5 A·g<sup>−1</sup>, 5.13 times that of Zn//c-V<sub>2</sub>O<sub>5</sub>, but also excellent rate capability and long-term cycling performance (with the residual capacity of 138.2 mAh·g<sup>−1</sup> over 10000 cycles at 10 A·g<sup>−1</sup>).</p>

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Vanadium oxide cathode pillared by Al3+ and H2O for high-performance aqueous zinc-ion batteries

  • 期刊论文

  • 发表日期：

    2025年9月2日

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  • Li Xu,
  • Xincheng Wang,
  • Shoubo Li,
  • Wenyu Zhang,
  • Yuchen Wang,
  • Yae Qi

摘要

Aqueous zinc-ion batteries (AZBs) are considered safer and potential substitutes for large-scale energy storage and conversion devices. The conventional vanadium pentoxide (V2O5) cathode material has attracted widespread attention duo to its typical layered structure and high theoretical capacity. Unfortunately, it still suffers from severe structural collapse, sluggish diffusion dynamics, and fast capacity fading. Herein, we rationally designed and prepared trivalent Al3+ and H2O co-intercalated V2O5 (AlVO), in which Al3+ plays a “pillar” role and forms strong Al–O bonds, while H2O acts as the “lubricant”, synergistically maintaining the structural stability and accelerating the diffusion of zinc ions. The Zn//AlVO battery is found to possess not only an impressive reversible capacity of 390.7 mAh·g−1 at 0.5 A·g−1, 5.13 times that of Zn//c-V2O5, but also excellent rate capability and long-term cycling performance (with the residual capacity of 138.2 mAh·g−1 over 10000 cycles at 10 A·g−1).