PREPARATION OF ZINC ION HYBRID SUPERCAPACITOR ELECTRODE MATERIAL BASED ON CHINESE MEDICINE RESIDUE AND ITS PERFORMANCE

Zeng Guanghua; Zhang Zhipeng; Yu Zetao; Zhou Yabin; Tan Peng; Wei Lu

doi:10.19912/j.0254-0096.tynxb.2022-0753

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (9) : 532-538. DOI: 10.19912/j.0254-0096.tynxb.2022-0753

PREPARATION OF ZINC ION HYBRID SUPERCAPACITOR ELECTRODE MATERIAL BASED ON CHINESE MEDICINE RESIDUE AND ITS PERFORMANCE

Zeng Guanghua¹, Zhang Zhipeng², Yu Zetao¹, Zhou Yabin¹, Tan Peng¹, Wei Lu²

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Abstract

In this work, activated carbon with a hierarchical porous structure was prepared by hydrothermal and activation treatment with the medicinal residue of Sargentodoxa cunea as raw material, and its electrochemical properties as cathode material for zinc-ion hybrid supercapacitor were studied. Studies have shown that the activated carbon prepared at an activation temperature of 800 ℃ has a specific surface area of 2516 m²/g and a total pore volume of 1.335 cm³/g. The specific capacity of the hybrid supercapacitor is as high as 177.1 mAh/g at a current density of 0.1 A/g, which is much better than that of the traditional supercapacitor; at a current density of 10 A/g, the specific capacity can still be maintained above 74.6 mAh/g, after 4000 charge-discharge cycles at a current density of 1.5 A/g, the capacity retention can reach 85%, showing good rate capability and charge-discharge cycling stability. The abundant network of micropores, mesopores and macropores, as well as ion size matching between micropores of activated carbon and electrolyte ions, are the keys to ensure high-efficiency ion storage.

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activated carbon / electrode materials / Chinese medicine residue / hydrothermal / supercapacitor

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Zeng Guanghua, Zhang Zhipeng, Yu Zetao, Zhou Yabin, Tan Peng, Wei Lu. PREPARATION OF ZINC ION HYBRID SUPERCAPACITOR ELECTRODE MATERIAL BASED ON CHINESE MEDICINE RESIDUE AND ITS PERFORMANCE[J]. Acta Energiae Solaris Sinica. 2023, 44(9): 532-538 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0753

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