化工进展 ›› 2022, Vol. 41 ›› Issue (4): 2000-2006.DOI: 10.16085/j.issn.1000-6613.2021-0765

• 材料科学与技术 • 上一篇    下一篇

环糊精基活性炭的制备及其电化学性能

钱科1(), 邓苗2, 乔志军3, 方志梅1, 屠建飞1(), 阮殿波1,3()   

  1. 1.宁波大学机械工程与力学学院,浙江 宁波 315211
    2.中国人民解放军95979部队,山东 泰安 271207
    3.宁波中车新能源科技有限公司,中国中车超级电容储能及节能技术研究中心,浙江 宁波 315112
  • 收稿日期:2021-04-13 修回日期:2021-06-25 出版日期:2022-04-23 发布日期:2022-04-25
  • 通讯作者: 屠建飞,阮殿波
  • 作者简介:钱科(1997—),男,硕士研究生,研究方向为超级电容器电极材料。E-mail:627827445@qq.com
  • 基金资助:
    国家自然科学基金(22078164);山西省关键核心技术和共性技术研发攻关专项(20201102018);宁波市科技创新2025重大专项(2019B10045)

Preparation and electrochemical properties of cyclodextrin based activated carbon

QIAN Ke1(), DENG Miao2, QIAO Zhijun3, FANG Zhimei1, TU Jianfei1(), RUAN Dianbo1,3()   

  1. 1.College of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, Zhejiang, China
    2.The 95979th Troops of PLA, Tai’an 271207, Shandong, China
    3.Ningbo CRRC New Energy Technology Co. , Ltd. , CRRC Ultracapacitor Energy Storage and Energy Saving Technology Research Center, Ningbo 315211, Zhejiang, China
  • Received:2021-04-13 Revised:2021-06-25 Online:2022-04-23 Published:2022-04-25
  • Contact: TU Jianfei,RUAN Dianbo

摘要:

以环糊精为原料,采取先炭化后活化的方式,制备了具有高比表面积和丰富孔道结构的活性炭材料。本文通过改变KOH与环糊精炭化样品之间的碱炭比,研究了KOH用量对环糊精基活性炭结构及其电化学性能影响。在活化时间、活化温度等因素不变的情况下,活性炭的比表面积、总孔容及比电容随着碱炭比的提高,均呈现先增大后减小的趋势。当碱炭比为3时,活性炭的比表面积为1672m2/g,总孔容为0.75cm3/g,具有最佳的电容性能,在1A/g电流密度下比电容可达165F/g,优于同等条件下的商业炭21KSN(145F/g),50000次循环后的比电容保持率为98.7%。

关键词: 环糊精, 活性炭, KOH活化, 碱炭比, 电化学

Abstract:

Using cyclodextrin as raw material, activated carbon with high specific surface area and abundant pore structure were obtained by carbonization-activation method. Keeping activation time and activation temperature as constant, the pore structure and electrochemical performance of activated carbon in different alkali-carbon ratio (KOH/C) were investigated. Increasing the dosage of KOH, the surface area, total pore volume and specific capacitance of the samples all indicated a trend of first increasing and then decreasing. When the alkali-carbon ratio was 3, the prepared sample showed the best capacitance performance. This sample had the highest value of specific surface area (1672m2/g), and highest value of total pore volume (0.75m3/g). Moreover, the specific capacitance of the sample can reach 165F/g at 1A/g current density, which was better than commercial activated carbon 21KSN (140F/g) under the same condition, and its capacity retention rate was still 98.7% after 50000 cycles.

Key words: cyclodextrin, activated carbon, KOH activation, alkali carbon ratio, electrochemistry

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