Scholarlink

<p>Ideal fiber electrodes for flexible supercapacitors should integrate fast charge capability, high power density, and robust mechanical flexibility simultaneously, so as to match the demands of portable and wearable electronic devices. However, the practical development of such electrodes is greatly restricted by a long-standing trade-off between mechanical robustness and electrochemical performance. MXene-based filaments are promising for flexible electrodes owing to their exceptional electrical conductivity. However, MXene’s inherent poor spinnability presents a significant challenge in fabricating pure fibers. Aramid nanofibers (ANFs) possess high mechanical strength, abundant polar groups, and excellent spinnability, making them ideal polymeric additives for MXene-based fiber fabrication. In this study, ANFs/MXene composite fiber electrodes with excellent comprehensive performance were successfully prepared via a facile DMSO-based wet-spinning strategy. Benefiting from the DMSO solvent system, the composite spinning dope exhibited favorable colloidal stability and excellent spinnability. The resulting composite fibers possessed a highly ordered microstructure: MXene lamellae aligned axially along the fiber axis, while ANFs were intercalated between MXene sheets. Such tailored microstructure enabled a favorable balance between mechanical and electrochemical performances. For the optimized A1M4 composite fiber (ANFs/MXene mass ratio = 1:4), the composite fiber delivered a tensile strength of 49.5 ± 4.4 MPa, a modulus of 4.5 ± 0.004 GPa and an electrical conductivity of 3145.8 S m<sup>−1</sup>. Electrochemical tests demonstrated that the A1M4 fiber achieved a specific gravimetric capacitance of 63.18 F g<sup>−1</sup> at 0.2 A g<sup>−1</sup>, with 91.1% capacitance retention after 1000 galvanostatic charge–discharge cycles. This work elucidates the DMSO-mediated dissolution-phase transformation mechanism for in-situ orientation regulation of ANF/MXene microstructures, offering new rational strategies for designing advanced fibrous electrodes toward flexible energy storage systems.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

ANFs-assisted wet-spinning of MXene-based composite fiber electrodes for flexible supercapacitors

  • 期刊论文

  • 发表日期：

    2026年7月14日

查看全文
  • Jie Sun,
  • Yingtong Zhou,
  • Yun Qu,
  • Liping Zhang,
  • Chengyi Xiang

摘要

Ideal fiber electrodes for flexible supercapacitors should integrate fast charge capability, high power density, and robust mechanical flexibility simultaneously, so as to match the demands of portable and wearable electronic devices. However, the practical development of such electrodes is greatly restricted by a long-standing trade-off between mechanical robustness and electrochemical performance. MXene-based filaments are promising for flexible electrodes owing to their exceptional electrical conductivity. However, MXene’s inherent poor spinnability presents a significant challenge in fabricating pure fibers. Aramid nanofibers (ANFs) possess high mechanical strength, abundant polar groups, and excellent spinnability, making them ideal polymeric additives for MXene-based fiber fabrication. In this study, ANFs/MXene composite fiber electrodes with excellent comprehensive performance were successfully prepared via a facile DMSO-based wet-spinning strategy. Benefiting from the DMSO solvent system, the composite spinning dope exhibited favorable colloidal stability and excellent spinnability. The resulting composite fibers possessed a highly ordered microstructure: MXene lamellae aligned axially along the fiber axis, while ANFs were intercalated between MXene sheets. Such tailored microstructure enabled a favorable balance between mechanical and electrochemical performances. For the optimized A1M4 composite fiber (ANFs/MXene mass ratio = 1:4), the composite fiber delivered a tensile strength of 49.5 ± 4.4 MPa, a modulus of 4.5 ± 0.004 GPa and an electrical conductivity of 3145.8 S m−1. Electrochemical tests demonstrated that the A1M4 fiber achieved a specific gravimetric capacitance of 63.18 F g−1 at 0.2 A g−1, with 91.1% capacitance retention after 1000 galvanostatic charge–discharge cycles. This work elucidates the DMSO-mediated dissolution-phase transformation mechanism for in-situ orientation regulation of ANF/MXene microstructures, offering new rational strategies for designing advanced fibrous electrodes toward flexible energy storage systems.