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<p>As a significant role in the human body, zinc ions were used to prepare the electrodes and devices of the supercapacitors with the amorphous carbon obtained from planted gourd leaves by <i>in situ</i> hydrolysis and <i>in situ</i> hydrothermal treatment. Herein, sandwich structure Zn<sub>2</sub>SiO<sub>4</sub>·H<sub>2</sub>O@C@Zn<sub>2</sub>SiO<sub>4</sub>·H<sub>2</sub>O (C@ZnSi and C@ZnSi@ZnSi) prepared by <i>in-situ</i> growth strategy is facilitated by the insertion and removal of OH<sup>−</sup> adsorption for energy storage. As the conductive core, the internal amorphous C can facilitate the rapid transfer of electrons, thus significantly enhancing the conductivity of the materials. In detail, in the three-electrode system, C@ZnSi@ZnSi exhibited high electrochemical performance (591 F g<sup>−1</sup> at 0.5 A g<sup>−1</sup> and the capacitance retention of 98.7% after 10,000 cycles). The HSC devices also achieve very excellent electrochemical properties (the areal specific capacitance with 714 mF cm<sup>−2</sup> at 2 mA cm<sup>−2</sup>, the energy density with 4.65 Wh m<sup>−2</sup> at the power density of 15.24 W m<sup>−2</sup> and the cycle stability with 75.8% after 10,000 cycles. Additionally, it opens up a new territory for the preparation of supercapacitors, which enhances electrochemical performance while reducing environmental pollution and lowering costs. Due to the high electrochemical performance of the supercapacitors, it may serve as a possible explanation for the superpowers of the Calabash Brothers, especially the Red Boy and Orange Boy.</p>

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The secret of the magic gourd (II): zinc-silicate integrated with gourd leaf-derived biomass carbon for high-performance supercapacitors

  • 期刊论文

  • 发表日期：

    2025年6月16日

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  • Shaoqing Zhang,
  • Xinyu Sun,
  • Guozhong Zhang,
  • Xiang Ke,
  • Yougui Li,
  • Tianming Lv,
  • Jiqi Zheng,
  • Xuchun Wang,
  • Miao Cui,
  • Changgong Meng

摘要

As a significant role in the human body, zinc ions were used to prepare the electrodes and devices of the supercapacitors with the amorphous carbon obtained from planted gourd leaves by in situ hydrolysis and in situ hydrothermal treatment. Herein, sandwich structure Zn2SiO4·H2O@C@Zn2SiO4·H2O (C@ZnSi and C@ZnSi@ZnSi) prepared by in-situ growth strategy is facilitated by the insertion and removal of OH− adsorption for energy storage. As the conductive core, the internal amorphous C can facilitate the rapid transfer of electrons, thus significantly enhancing the conductivity of the materials. In detail, in the three-electrode system, C@ZnSi@ZnSi exhibited high electrochemical performance (591 F g−1 at 0.5 A g−1 and the capacitance retention of 98.7% after 10,000 cycles). The HSC devices also achieve very excellent electrochemical properties (the areal specific capacitance with 714 mF cm−2 at 2 mA cm−2, the energy density with 4.65 Wh m−2 at the power density of 15.24 W m−2 and the cycle stability with 75.8% after 10,000 cycles. Additionally, it opens up a new territory for the preparation of supercapacitors, which enhances electrochemical performance while reducing environmental pollution and lowering costs. Due to the high electrochemical performance of the supercapacitors, it may serve as a possible explanation for the superpowers of the Calabash Brothers, especially the Red Boy and Orange Boy.