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<p>Carbon cloth serves as a widely utilized flexible substrate for supercapacitor electrodes. This study presents a novel tannic acid-assisted strategy to <i>in situ</i> anchor cuprous sulfide (Cu<sub>2</sub>S) onto carbon cloth, where tannic acid functions through triple mechanisms: chelating copper ions for stable anchoring, preventing Cu<sub>2</sub>S detachment to maintain high loading capacity, and reducing charge transfer resistance. Comprehensive characterization confirms the uniform distribution and strong adhesion of Cu<sub>2</sub>S nanoparticles on the tannic acid-treated carbon cloth. The resulting tannic acid-impregnated carbon cloth (TCC)-Cu<sub>2</sub>S electrode achieves exceptional electrochemical performance with a high specific capacitance of 742.25&#xa0;F&#xa0;g<sup>−1</sup> at 10&#xa0;mV&#xa0;s<sup>−1</sup>, an ultralow internal resistance of 0.5&#xa0;Ω, and outstanding cycling stability retaining 90.47% capacitance after 10,000 charge–discharge cycles. This work establishes a simple, ecofriendly approach for fabricating high-performance flexible supercapacitors with significantly enhanced stability and conductivity.</p> Graphical Abstract <p></p>

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In Situ Growth of Cu2S on Carbon Cloth Assisted by Tannic Acid for Supercapacitor Applications

  • 期刊论文

  • 发表日期：

    2026年8月1日

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  • Haijun Wang,
  • Yongquan Wang,
  • Yongli Liang,
  • Yuan Shen

摘要

Carbon cloth serves as a widely utilized flexible substrate for supercapacitor electrodes. This study presents a novel tannic acid-assisted strategy to in situ anchor cuprous sulfide (Cu2S) onto carbon cloth, where tannic acid functions through triple mechanisms: chelating copper ions for stable anchoring, preventing Cu2S detachment to maintain high loading capacity, and reducing charge transfer resistance. Comprehensive characterization confirms the uniform distribution and strong adhesion of Cu2S nanoparticles on the tannic acid-treated carbon cloth. The resulting tannic acid-impregnated carbon cloth (TCC)-Cu2S electrode achieves exceptional electrochemical performance with a high specific capacitance of 742.25 F g−1 at 10 mV s−1, an ultralow internal resistance of 0.5 Ω, and outstanding cycling stability retaining 90.47% capacitance after 10,000 charge–discharge cycles. This work establishes a simple, ecofriendly approach for fabricating high-performance flexible supercapacitors with significantly enhanced stability and conductivity.

Graphical Abstract