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<p>Aqueous zinc-ion batteries (AZIBs) have considered as an alternative power source to replace the lithium-ion batteries, due to their high safety and eco-friendly electrolyte properties. However, the practical application of yarn-shaped AZIBs remains challenging because of their limited capacity and energy density. These shortcomings originate from the non-uniform distribution of active materials and sluggish reaction kinetics, which impede overall electrochemical performance. Herein, we develop a full-scale (nano-, micro-, and macroscale) architectural engineering strategy synergistically combining crystal water intercalation and MXene incorporation within the cathode active material with conductive surface wrapping on the yarn cathode. By integrating these features, we construct an advanced core–sheath CNT/V<sub>2</sub>O<sub>5</sub>·nH<sub>2</sub>O/MXene (CVOM) composite yarn cathode that significantly enhances the performance of AZIBs. The resulting CVOM yarn cathode exhibits good electrochemical properties, such as a high specific capacity of 214.9 mAh g<sup>−1</sup>, energy density of 171.8 Wh kg<sup>−1</sup>, and exceptional cycling stability with 86.9% capacity retention after 5000 cycles. These performance metrics surpass those of most previously reported yarn-shaped AZIBs. Furthermore, the CVOM-based AZIBs exhibit practical potential by effectively storing solar energy to operate wearable electronics. This work proposes a full-scale engineering strategy to solve the bottlenecks of yarn-shaped AZIBs, providing a viable route toward future wearable energy storage systems.</p>

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Full-scale engineered V2O5/MXene/CNT composite yarn cathodes for high-performance flexible zinc-ion batteries

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Xianhong Zheng,
  • Shuai Wang,
  • Binbin Ding,
  • Hongye Xia,
  • Yidan Ding,
  • Zhiqi Zhao,
  • Zhi Liu,
  • Guiyang Li,
  • Peng Wang,
  • Xiaoshuang Zhou,
  • Lihua Zou

摘要

Aqueous zinc-ion batteries (AZIBs) have considered as an alternative power source to replace the lithium-ion batteries, due to their high safety and eco-friendly electrolyte properties. However, the practical application of yarn-shaped AZIBs remains challenging because of their limited capacity and energy density. These shortcomings originate from the non-uniform distribution of active materials and sluggish reaction kinetics, which impede overall electrochemical performance. Herein, we develop a full-scale (nano-, micro-, and macroscale) architectural engineering strategy synergistically combining crystal water intercalation and MXene incorporation within the cathode active material with conductive surface wrapping on the yarn cathode. By integrating these features, we construct an advanced core–sheath CNT/V2O5·nH2O/MXene (CVOM) composite yarn cathode that significantly enhances the performance of AZIBs. The resulting CVOM yarn cathode exhibits good electrochemical properties, such as a high specific capacity of 214.9 mAh g−1, energy density of 171.8 Wh kg−1, and exceptional cycling stability with 86.9% capacity retention after 5000 cycles. These performance metrics surpass those of most previously reported yarn-shaped AZIBs. Furthermore, the CVOM-based AZIBs exhibit practical potential by effectively storing solar energy to operate wearable electronics. This work proposes a full-scale engineering strategy to solve the bottlenecks of yarn-shaped AZIBs, providing a viable route toward future wearable energy storage systems.