Scholarlink

<p>Zinc ion hybrid supercapacitors (ZIHSCs) are among the most prominent energy storage devices due to their low fabrication cost and improved energy density. Activated carbon-based cathodes have attracted researchers due to their porous structure and high surface area, which facilitate swift molecular diffusion and provide an abundance of accessible active sites. In the present study, the activated discarded water filter carbon (UWFC) has been used as a cathode material for ZIHSCs. The UWFC has been recovered from the used waste carbon filter, washed thoroughly with water, and activated with acid, followed by subsequent calcination. The measured specific surface area of activated carbon (AC) is 920 m<sup>2</sup> g<sup>-1</sup>. The ZIHSC cell has been fabricated using a zinc foil anode and an AC cathode in a 1&#xa0;M ZnSO<sub>4</sub> electrolyte. The specific capacitance is 181&#xa0;F g<sup>-1</sup> at 0.5&#xa0;A g<sup>-1</sup> current density. The capacitance retention is 95% after 5000 continuous charge-discharge cycles. The ZIHSC exhibits 81 Wh kg<sup>-1</sup><sub>,</sub> a high energy density at a power density of 450&#xa0;W kg<sup>-1</sup>. The high performance of the AC cathode is attributed to its porous, high surface area of activated carbon.</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

Recycled activated carbon cathode for an aqueous zinc-ion hybrid supercapacitor

  • 期刊论文

  • 发表日期：

    2026年4月9日

查看全文
  • R. Swarna,
  • R. Sreekanth,
  • M. S. Vasanthkumar,
  • S. Shivakumara

摘要

Zinc ion hybrid supercapacitors (ZIHSCs) are among the most prominent energy storage devices due to their low fabrication cost and improved energy density. Activated carbon-based cathodes have attracted researchers due to their porous structure and high surface area, which facilitate swift molecular diffusion and provide an abundance of accessible active sites. In the present study, the activated discarded water filter carbon (UWFC) has been used as a cathode material for ZIHSCs. The UWFC has been recovered from the used waste carbon filter, washed thoroughly with water, and activated with acid, followed by subsequent calcination. The measured specific surface area of activated carbon (AC) is 920 m2 g-1. The ZIHSC cell has been fabricated using a zinc foil anode and an AC cathode in a 1 M ZnSO4 electrolyte. The specific capacitance is 181 F g-1 at 0.5 A g-1 current density. The capacitance retention is 95% after 5000 continuous charge-discharge cycles. The ZIHSC exhibits 81 Wh kg-1, a high energy density at a power density of 450 W kg-1. The high performance of the AC cathode is attributed to its porous, high surface area of activated carbon.