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材料导报  2023, Vol. 37 Issue (9): 21060091-7    https://doi.org/10.11896/cldb.21060091
  无机非金属及其复合材料 |
胡萝卜基分级多孔炭材料的制备及电化学性能研究
王琼, 黄自知*, 胡云楚*, 袁利萍, 文瑞芝, 杨婷
中南林业科技大学理学院,长沙 410004
Preparation and Electrochemical Properties of Carrot-based Hierarchical Porous Carbon
WANG Qiong, HUANG Zizhi*, HU Yunchu*, YUAN Liping, WEN Ruizhi, YANG Ting
College of Science, Central South University of Forestry and Technology, Changsha 410004, China
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摘要 以胡萝卜为炭源,采用KOH对胡萝卜炭进行活化,制备出具有高比电容的分级多孔炭材料。利用SEM、X射线衍射分析、低温氮气吸脱附等手段对制备的材料进行形貌及结构分析,结果表明,不同碱炭比会造成炭材料不同程度的结构变化,在碱炭比为2∶1时,所制备的炭材料孔隙结构分布最佳,比表面积高达3 111.45 m2/g,总孔容为1.51 m3/g。循环伏安(CV)、恒流充放电(GCD)等电化学测试表明,在最佳活化条件下制备的胡萝卜基多孔炭材料制成的电极在6 mol/L KOH电解液、0.5 A/g电流密度条件下比电容为486 F/g,表明材料具有良好的电容性能;当电流密度提升20倍时,电容量保留为原来的86%,表明材料具有良好的倍率性能;10 A/g电流密度下经8 000次循环后,电容保持率为97.3%,表明材料具有良好的稳定性。胡萝卜基多孔炭材料制成的电极片所组装的水系超级电容器器件能量密度可达14.67 Wh/kg,功率密度为1 000 W/kg。
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王琼
黄自知
胡云楚
袁利萍
文瑞芝
杨婷
关键词:  胡萝卜  分级多孔  超级电容器  电化学性能    
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
出版日期:  2023-05-10      发布日期:  2023-05-04
ZTFLH:  TQ424.1  
  TM53  
基金资助: 国家自然科学基金(31670563);湖南省高校创新平台开放基金(18K058);2020年高新技术产业科技创新引领计划 (2020GK2061);2021年中南林业科技大学大学生创新创业训练计划项目
通讯作者:  *黄自知,中南林业科技大学讲师。于2009年6月本科毕业于湖南工程学院,2012年中南林业科技大学应用化学专业硕士毕业后到中南林业科技大学工作至今。发表研究论文10余篇,申请获得国家发明专利授权6项,主要从事生物质材料电化学储能性能的研究。zhizihuang@126.com
胡云楚,中南林业科技大学教授、博士研究生导师。1982年本科毕业于湖南师范大学,2006年博士毕业于中南林业科技大学。主持完成国家自然科学基金面上项目4项,在国内外学术期刊发表研究论文100多篇,申请获得国家发明专利授权20多项,主要从事生物质资源高值利用的研究工作。hucsfu@163.com   
作者简介:  王琼,2019年6月于湘南学院获得工学学士学位。现为中南林业科技大学理学院硕士研究生,在胡云楚教授和黄自知老师的指导下进行研究。目前主要研究领域为生物质能源和超级电容器。
引用本文:    
王琼, 黄自知, 胡云楚, 袁利萍, 文瑞芝, 杨婷. 胡萝卜基分级多孔炭材料的制备及电化学性能研究[J]. 材料导报, 2023, 37(9): 21060091-7.
WANG Qiong, HUANG Zizhi, HU Yunchu, YUAN Liping, WEN Ruizhi, YANG Ting. Preparation and Electrochemical Properties of Carrot-based Hierarchical Porous Carbon. Materials Reports, 2023, 37(9): 21060091-7.
链接本文:  
http://www.mater-rep.com/CN/10.11896/cldb.21060091  或          http://www.mater-rep.com/CN/Y2023/V37/I9/21060091
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