<p>The integration of high-capacity active materials onto flexible substrates is essential for advancing flexible sodium-ion batteries (SIBs). Herein, we report a novel strategy for fabricating high-performance, flexible SIB anodes via the immobilization of molybdenum disulfide (MoS<sub>2</sub>) nanoparticles on carbon cloth (CC) modified with metal–organic framework-derived carbon nanotubes (MOF-derived CNTs). In this method, Co-containing zeolitic imidazolate frameworks (ZIFs) were assembled on polyaniline-coated CC, followed by CNT growth via chemical vapor deposition (CVD) and hydrothermal deposition of MoS<sub>2</sub>. The resulting MoS<sub>2</sub>@CNT@CC electrodes achieved significantly higher MoS<sub>2</sub> loading (15–20&#xa0;wt%) compared to direct deposition on CC (&lt; 5 wt%). Electrochemical evaluation revealed an initial discharge capacity of 231 mAh g<sup>−1</sup> with a Coulombic efficiency of 94.3%, outperforming MoS<sub>2</sub>@CC (150&#xa0;mAh g<sup>−1</sup>, 77.8%) and bare CC (113 mAh g<sup>−1</sup>, 74.3%). After 100 cycles at 50&#xa0;mA&#xa0;g<sup>−1</sup>, MoS<sub>2</sub>@CNT@CC maintained a stable capacity of 133 mAh g<sup>−1</sup> and an average Coulombic efficiency of 99.9%. Cyclic voltammetry confirmed enhanced redox activity, while mechanical tests showed no significant degradation after 10,000 bending cycles (10&#xa0;mm radius). These findings highlight the effectiveness of MOF-derived CNTs in enhancing MoS<sub>2</sub> loading, conductivity, and mechanical resilience, offering a promising route toward robust and efficient flexible SIB anodes.</p>

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Immobilization of molybdenum disulfide nanoparticles onto metal–organic framework-derived carbon nanotubes and carbon cloth templates for flexible sodium-ion battery anodes

  • Jinwoo Hwang,
  • Gyeongbeom Ryoo,
  • Seokkyu Kim,
  • Joong Tark Han,
  • Eunho Lee,
  • Jong Hwan Park

摘要

The integration of high-capacity active materials onto flexible substrates is essential for advancing flexible sodium-ion batteries (SIBs). Herein, we report a novel strategy for fabricating high-performance, flexible SIB anodes via the immobilization of molybdenum disulfide (MoS2) nanoparticles on carbon cloth (CC) modified with metal–organic framework-derived carbon nanotubes (MOF-derived CNTs). In this method, Co-containing zeolitic imidazolate frameworks (ZIFs) were assembled on polyaniline-coated CC, followed by CNT growth via chemical vapor deposition (CVD) and hydrothermal deposition of MoS2. The resulting MoS2@CNT@CC electrodes achieved significantly higher MoS2 loading (15–20 wt%) compared to direct deposition on CC (< 5 wt%). Electrochemical evaluation revealed an initial discharge capacity of 231 mAh g−1 with a Coulombic efficiency of 94.3%, outperforming MoS2@CC (150 mAh g−1, 77.8%) and bare CC (113 mAh g−1, 74.3%). After 100 cycles at 50 mA g−1, MoS2@CNT@CC maintained a stable capacity of 133 mAh g−1 and an average Coulombic efficiency of 99.9%. Cyclic voltammetry confirmed enhanced redox activity, while mechanical tests showed no significant degradation after 10,000 bending cycles (10 mm radius). These findings highlight the effectiveness of MOF-derived CNTs in enhancing MoS2 loading, conductivity, and mechanical resilience, offering a promising route toward robust and efficient flexible SIB anodes.