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<p>Zinc in hybrid supercapacitors (ZHCs) have attracted much attention due to advantages of low-cost, high energy density and safety that will expand the scope of energy storage applications in the future. In this study, fibrous zinc-ion hybrid supercapacitors (FZHCs) were prepared utilizing polypyrrole@stainless steel yarn (PPy@SSY) as the cathode and zinc wire as the anode. Using SSY as the current collector and substrate, PPy@SSY electrodes were fabricated through electropolymerization. Due to the bivalent characteristic of zinc and pseudocapacitve characteristic of PPy, FZHCs exhibit a high energy density of 55.4&#xa0;Wh&#xa0;kg<sup>−1</sup> at 160.0&#xa0;W&#xa0;kg<sup>−1</sup> and a maximum power density of 1600.0&#xa0;W&#xa0;kg<sup>−1</sup> at 19.2&#xa0;Wh&#xa0;kg<sup>−1</sup>. Furthermore, FZHC also demonstrates exceptional mechanical stability, with a capacity retention rate of 92.7% after undergoing bending cycles from 0° to 180°. This makes it a promising candidate for widespread application in the field of flexible electronic devices.</p>

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Cauliflower-like polypyrrole@stainless steel yarn electrode for fibrous zinc-ion hybrid supercapacitor

  • 期刊论文

  • 发表日期：

    2025年3月31日

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  • Lijuan Xiao,
  • Yulin Li,
  • Qilong Chen,
  • Jirui Li,
  • Feng Qin,
  • Yan Deng,
  • Chao Yang

摘要

Zinc in hybrid supercapacitors (ZHCs) have attracted much attention due to advantages of low-cost, high energy density and safety that will expand the scope of energy storage applications in the future. In this study, fibrous zinc-ion hybrid supercapacitors (FZHCs) were prepared utilizing polypyrrole@stainless steel yarn (PPy@SSY) as the cathode and zinc wire as the anode. Using SSY as the current collector and substrate, PPy@SSY electrodes were fabricated through electropolymerization. Due to the bivalent characteristic of zinc and pseudocapacitve characteristic of PPy, FZHCs exhibit a high energy density of 55.4 Wh kg−1 at 160.0 W kg−1 and a maximum power density of 1600.0 W kg−1 at 19.2 Wh kg−1. Furthermore, FZHC also demonstrates exceptional mechanical stability, with a capacity retention rate of 92.7% after undergoing bending cycles from 0° to 180°. This makes it a promising candidate for widespread application in the field of flexible electronic devices.