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<p>Porous hard carbon has recently gained attention as an anode material for KIB because of its superior potassium ion storage performance. In this study, an efficient method for producing polyethylene-based hollow porous carbon is presented. Partial sulfonation was applied, and the porosity of the resulting carbon material was regulated by the sulfonation time. A hollow structure with the high specific surface area of 173.3 m<sup>2</sup>/g was achieved via partial sulfonation and carbonization without additional activation. Using polyethylene (PE)-based porous carbon as an anode material for KIB, a high specific discharge capacity of 187 mAh/g and excellent rate capability &#xa0;at 1000 mA/g were achieved. Moreover, potassium-ion storage mechanisms were identified and compared with those of non-porous PE-based carbon anodes. This study provides an effective method for preparing porous PE-based carbon with superior energy storage performance.</p>

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Polyethylene based hollow porous carbon by facile method for KIB anode material

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Chaehun Lim,
  • Go Bong Choi,
  • Seongjae Myeong,
  • Sangyeop Lee,
  • Minah Kang,
  • Young-Seak Lee

摘要

Porous hard carbon has recently gained attention as an anode material for KIB because of its superior potassium ion storage performance. In this study, an efficient method for producing polyethylene-based hollow porous carbon is presented. Partial sulfonation was applied, and the porosity of the resulting carbon material was regulated by the sulfonation time. A hollow structure with the high specific surface area of 173.3 m2/g was achieved via partial sulfonation and carbonization without additional activation. Using polyethylene (PE)-based porous carbon as an anode material for KIB, a high specific discharge capacity of 187 mAh/g and excellent rate capability  at 1000 mA/g were achieved. Moreover, potassium-ion storage mechanisms were identified and compared with those of non-porous PE-based carbon anodes. This study provides an effective method for preparing porous PE-based carbon with superior energy storage performance.