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Multilayer carbon materials prepared from Zanthoxylum schinifolium husk for high-performance supercapacitors.


ABSTRACT: In this work, porous carbon mixed with nitrogen (NC) prepared using Zanthoxylum schinifolium husk as a precursor has been successfully applied in a supercapacitor (SC). The effects of KOH dosage on the structure, composition and capacitive properties of the carbon were investigated by a variety of techniques (SEM, HRTEM, XRD, Raman spectroscopy, XPS, BET, and electrochemical tests). The results of physical characterizations also confirmed that NC had a high specific surface area, abundant pores and a large number of heteroatomic functional groups. Meanwhile, the sample exhibits the best electrochemical performance in a 6 M KOH electrolyte, including high specific capacitance (333.7 F g-1 at a current density of 0.5 A g-1), desirable rate capability and superior cycling stability (97.9% capacitance retention after 5000 cycles). More importantly, the assembled symmetrical supercapacitor (NC-3//NC-3) holds superior energy density (16.7 W h kg-1 at a power density of 300.6 W kg-1) and good cycling stability (98.5% specific capacitance retention after 5000 cycles).

SUBMITTER: Yin H 

PROVIDER: S-EPMC9049566 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Multilayer carbon materials prepared from <i>Zanthoxylum schinifolium</i> husk for high-performance supercapacitors.

Yin Haiyan H   Zheng Hong H   Yang Liu L   Wang Shuya S   Liu Lian L  

RSC advances 20200204 10


In this work, porous carbon mixed with nitrogen (NC) prepared using <i>Zanthoxylum schinifolium</i> husk as a precursor has been successfully applied in a supercapacitor (SC). The effects of KOH dosage on the structure, composition and capacitive properties of the carbon were investigated by a variety of techniques (SEM, HRTEM, XRD, Raman spectroscopy, XPS, BET, and electrochemical tests). The results of physical characterizations also confirmed that NC had a high specific surface area, abundant  ...[more]

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