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<p>Structural optimization plays a crucial role in modulating the electrochemical properties of electrode materials. The synergistic effect of Co and V in Co<sub>2</sub>VO<sub>4</sub> materials can significantly enhance electrochemical performance; however, the rapid capacity decay during cycling presents a critical challenge that requires attention. This issue can be effectively addressed by carbon coating. In this study, the amount of carbon coating was systematically optimized, leading to the development of Co<sub>2</sub>VO<sub>4</sub>@C material that exhibits outstanding lithium storage performance. As an anode material, Co<sub>2</sub>VO<sub>4</sub>@C delivers a specific capacity of 814.8 mAh g<sup>−1</sup> after 100 cycles at 0.1 A g<sup>−1</sup>. Notably, Co<sub>2</sub>VO<sub>4</sub>@C has been developed as an anode for high-performance lithium-ion capacitors (LICs), and the Co<sub>2</sub>VO<sub>4</sub>@C//AC LICs demonstrate a maximum energy density of 160.3 Wh kg<sup>−1</sup> and a peak power density of 20.95&#xa0;kW&#xa0;kg<sup>−1</sup>, showcasing its promising potential in energy storage applications.</p>

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Co2VO4@C composite anode as a high‑energy and fast‑charging anode for lithium-ion capacitors

  • 期刊论文

  • 发表日期：

    2025年8月28日

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  • Tie-Zhu Ma,
  • Shi-Chun Zhang,
  • Zhi-Wei Li,
  • Yong-Ming Zhang,
  • Tong-Su,
  • Ai-Jun Jiao,
  • Xiuping Ding,
  • Zhen-Hai Fu

摘要

Structural optimization plays a crucial role in modulating the electrochemical properties of electrode materials. The synergistic effect of Co and V in Co2VO4 materials can significantly enhance electrochemical performance; however, the rapid capacity decay during cycling presents a critical challenge that requires attention. This issue can be effectively addressed by carbon coating. In this study, the amount of carbon coating was systematically optimized, leading to the development of Co2VO4@C material that exhibits outstanding lithium storage performance. As an anode material, Co2VO4@C delivers a specific capacity of 814.8 mAh g−1 after 100 cycles at 0.1 A g−1. Notably, Co2VO4@C has been developed as an anode for high-performance lithium-ion capacitors (LICs), and the Co2VO4@C//AC LICs demonstrate a maximum energy density of 160.3 Wh kg−1 and a peak power density of 20.95 kW kg−1, showcasing its promising potential in energy storage applications.