胡萝卜基分级多孔炭材料的制备及电化学性能研究

doi:10.11896/cldb.21060091

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Abstract Carrot carbon was used as carbon source, KOH activation method was developed to prepare highly qualified porous carbon with hierarchical pore size distribution and high specific surface area. The morphology and structure of the prepared materials were analyzed by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) analysis, and nitrogen adsorption-desorption. The results showed that the diffe-rent KOH to carbon ratio would cause different degree of structural changes of the carbon materials. When the alkali to carbon ratio was 2∶1, the pore structure distribution of the prepared carbon material showed the best with the specific surface area of 3 111.45 m²/g and total pore volume of 1.51 m³/g. The cyclic voltammetry and constant current charge-discharge tests showed that the specific capacitance of the electrodes prepared under the optimal activation conditions was 486 F/g at 6 mol/L KOH electrolyte and 0.5 A/g current density, which indicated that the material had good electrochemical performance. When the current density was increased by 20 times, the capacitance retention was 86% of the original, which indicated that the material had good rate performance. The capacitance retention was reserved as 97.3% after 8 000 test cycles at 10 A/g current density which demonstrated that the material had good stability. The energy density and power density of the water-based supercapacitor device assembled by the carrot-based hierarchical porous carbon electrode plate could reach 14.67 Wh/kg and 1 000 W/kg.

Key words： carrot hierarchical porous supercapacitor electrochemical performance

Published: 10 May 2023 Online: 2023-05-04

CLC number:	TQ424.1
	TM53

Fund:National Natural Science Foundation of China (31670563),University Innovation Platform Fund of Hunan (18K058),2020 Hunan High-tech Industry Science and Technology Innovation Leading Project (2020GK2061),and 2021 Student Innovation and Entrepreneurship Training Program of Central South University of Forestry and Technology.

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	Articles by authors
	WANG Qiong
	HUANG Zizhi
	HU Yunchu
	YUAN Liping
	WEN Ruizhi
	YANG Ting

Cite this article:

WANG Qiong,HUANG Zizhi,HU Yunchu, et al. Preparation and Electrochemical Properties of Carrot-based Hierarchical Porous Carbon[J]. Materials Reports, 2023, 37(9): 21060091-7.

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http://www.mater-rep.com/EN/10.11896/cldb.21060091 OR http://www.mater-rep.com/EN/Y2023/V37/I9/21060091

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