<p>Utilizing biomass materials to prepare porous carbon materials for zinc-ion hybrid capacitors (ZHCs) can not only enhance the added value of biomass but also fulfill the requirement for carbon material in the field of energy storage. Therefore, ginkgo fruits (GF) were used as raw material to prepare carbon material by rapid carbonization. When the carbonization temperature was 800°C and the weight ratio of the pre-carbonized ginkgo fruits to the activator, KOH, was 1:4, the obtained porous carbon material, GF-1:4, demonstrated good performance in the fabricated ZHC, achieving specific capacitance of 544.3 F g<sup>−1</sup> at a current density of 0.2 A g<sup>−1</sup>. The structural analysis revealed that GF-1:4 possesses specific surface area of 2131.2 m<sup>2</sup>&#xa0;g<sup>−1</sup> and high graphite carbon content, contributing to its superior performance in ZHCs. The detailed investigation of the electrochemical properties of ZHC assembled using GF-1:4 as electrode showed that the energy density of ZHC reached 277.8 Wh kg<sup>−1</sup> at power density of 189.9 W kg<sup>−1</sup>. Meanwhile, the fabricated ZHC showed good cycle stability, retaining 95.2% of initial capacitance after 5000 cycles. Thus, the bio-based carbon materials prepared using ginkgo fruits as raw materials offer advantages of high performance and low cost, demonstrating significant application potential in the utilization of ZHCs.</p>

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Application of Ginkgo Fruit-Derived Porous Carbon Material in Zinc-Ion Hybrid Capacitors

  • Song Wang,
  • Jiening Xu

摘要

Utilizing biomass materials to prepare porous carbon materials for zinc-ion hybrid capacitors (ZHCs) can not only enhance the added value of biomass but also fulfill the requirement for carbon material in the field of energy storage. Therefore, ginkgo fruits (GF) were used as raw material to prepare carbon material by rapid carbonization. When the carbonization temperature was 800°C and the weight ratio of the pre-carbonized ginkgo fruits to the activator, KOH, was 1:4, the obtained porous carbon material, GF-1:4, demonstrated good performance in the fabricated ZHC, achieving specific capacitance of 544.3 F g−1 at a current density of 0.2 A g−1. The structural analysis revealed that GF-1:4 possesses specific surface area of 2131.2 m2 g−1 and high graphite carbon content, contributing to its superior performance in ZHCs. The detailed investigation of the electrochemical properties of ZHC assembled using GF-1:4 as electrode showed that the energy density of ZHC reached 277.8 Wh kg−1 at power density of 189.9 W kg−1. Meanwhile, the fabricated ZHC showed good cycle stability, retaining 95.2% of initial capacitance after 5000 cycles. Thus, the bio-based carbon materials prepared using ginkgo fruits as raw materials offer advantages of high performance and low cost, demonstrating significant application potential in the utilization of ZHCs.