电化学双电层电容器电极材料——豌豆荚基活性炭的制备与表征

doi:10.3866/PKU.WHXB20110623

物理化学学报 >> 2011, Vol. 27 >> Issue (07): 1679-1684.doi: 10.3866/PKU.WHXB20110623

电化学双电层电容器电极材料——豌豆荚基活性炭的制备与表征

曹国飞, 廖奕, 张小华, 陈金华

化学生物传感与计量学国家重点实验室, 湖南大学化学化工学院, 长沙 410082

收稿日期:2010-11-22 修回日期:2011-04-19 发布日期:2011-06-28
通讯作者: 陈金华 E-mail:chenjinhua@hnu.edu.cn
基金资助:
教育部长江学者与创新团队发展计划(PCSIRT)，湖南省自然科学基金(04JJ1008)和高等学校博士学科点专项科研基金(20040532006)资助项目

Preparation and Characterization of Peasecod-Based Activated Carbons as Electrode Materials for Electrochemical Double-Layer Capacitors

CAO Guo-Fei, LIAO Yi, ZHANG Xiao-Hua, CHEN Jin-Hua

State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P. R. China

Received:2010-11-22 Revised:2011-04-19 Published:2011-06-28
Contact: CHEN Jin-Hua E-mail:chenjinhua@hnu.edu.cn
Supported by:
The project was supported by the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT), Ministry of Education China, Natural Science Foundation of Hunan Province, China (04JJ1008), and Specialized Research Fund for the Doctoral Program of Higher Education, China (20040532006).

摘要/Abstract

摘要：

以豌豆荚为碳源、ZnCl₂或KOH为活化剂制备了活性炭, 并用作双电层电容器的电极材料. 采用比表面及孔隙度分析仪表征了豌豆荚基活性炭的孔结构. 通过KOH或ZnCl₂活化后, 活性炭比表面积从1.69 m²·g^-1增大到2237或621 m²·g^-1. 采用循环伏安法和恒流充放电测试技术表征了豌豆荚基活性炭的电化学特性. 结果表明: 在6 mol·L^-1 KOH溶液中经KOH活化处理的活性炭的质量比电容高达297.5 F·g^-1, 并具有良好的充放电稳定性, 在5 A·g^-1的高电流密度下循环充放电500次后, 质量比电容仅衰减8.6%.

关键词: 双电层电容器, 活性炭, 豌豆荚, 储能, 农业废料

Abstract:

Activated carbons for electrochemical double-layer capacitor electrodes were prepared from peasecod-based carbons using ZnCl₂ or KOH as activating agents. The pore structures of the prepared activated carbon materials were characterized using N2 adsorption. The specific surface area of the peasecod-based carbon materials increased obviously from 1.69 m²·g^-1 to 2237 m²·g^-1 by KOH activation and to 621 m²·g^-1 by ZnCl₂ treatment. The electrochemical properties of the prepared peasecod-based activated carbon materials were evaluated by cyclic voltammetry and galvanostatic charge-discharge, and a specific capacitance as high as 297.5 F·g^-1 in 6 mol·L^-1 KOH aqueous electrolyte was obtained for the KOH-treated carbon material. Additionally, the KOH-activated peasecod-based carbon material showed excellent long-term charge-discharge cycle stability and a 8.6% decrease in the specific capacitance was observed at a high current density of 5 A·g^-1 after 500 cycles.

Key words: Double-layer capacitor, Activated carbon, Peasecod, Energy storage, Agricultural waste

曹国飞, 廖奕, 张小华, 陈金华. 电化学双电层电容器电极材料——豌豆荚基活性炭的制备与表征[J]. 物理化学学报, 2011, 27(07), 1679-1684. doi: 10.3866/PKU.WHXB20110623

CAO Guo-Fei, LIAO Yi, ZHANG Xiao-Hua, CHEN Jin-Hua. Preparation and Characterization of Peasecod-Based Activated Carbons as Electrode Materials for Electrochemical Double-Layer Capacitors[J]. Acta Phys. -Chim. Sin. 2011, 27(07), 1679-1684. doi: 10.3866/PKU.WHXB20110623

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20110623

https://www.whxb.pku.edu.cn/CN/Y2011/V27/I07/1679

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电化学双电层电容器电极材料——豌豆荚基活性炭的制备与表征

Preparation and Characterization of Peasecod-Based Activated Carbons as Electrode Materials for Electrochemical Double-Layer Capacitors

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