中孔炭的制备及其在超级电容器中的应用-中南大学学报.pdf

第 40 卷第 3 期 中南大学学报( 自然科学版) Vol.40 No.3 2009 年 6 月 Journal of Central South University (Science and Technology) Jun. 2009 中孔炭的制备及其在超级电容器中的应用 李 娜，王先友，魏建良，安红芳，郑丽萍 (湘潭大学 化学化工学院，湖南 湘潭，411105) 摘 要：以中孔硅分子筛SBA-15 为模板，蔗糖为炭源，炭化温度为 700 ℃制备中孔炭材料，利用透射电镜(TEM) 和 N2 吸脱附等温线表征该材料的结构与形貌。以中孔炭材料为超级电容器的电极材料，组装成扣式电容器进行 循环伏安、恒流充放电、交流阻抗、漏电流、自放电、循环寿命等电化学测试。结果表明：样品孔结构呈二维六 3 2 角有序分布；该样品的孔体积为 1.88 cm /g ，比表面积为 1 394 m /g ，具有典型的中孔结构和集中的中孔分布，它 的最可几孔径为 3.4 nm；制备的中孔炭作电极材料组装的超级电容器有良好的电化学性能，在 500 mA/g 的充放 电电流密度下，循环 10 000 次的平均比电容高达 95 F/g，比容量波动范围仅为−4%~4% 。 关键词：中孔炭；电极材料；超级电容器；比电容 中图分类号：TB383 ；O613.71 文献标识码：A 文章编号：1672−7207(2009)03−0601−07 Template synthesis of mesoporous carbon and its application in supercapacitors LI Na, WANG Xian-you, WEI Jian-liang, AN Hong-fang, ZHENG Li-ping (School of Chemistry and Chemical Engineering, Xiangtan University, Xiangtan 411105, China) Abstract: The templated mesoporous carbon(TMC) was prepared using SBA-15 as a template and sucrose as a carbon source at 700 ℃ carbonized temperature. The structure and morphology of mesoporous carbon were characterized by transmission electron microscopy (TEM) and N2 adsorption-desorption isotherm. The electrochemical properties of mesoporous carbon which was used as the active material of coin supercapacitor were studied by cyclic voltammery, constant current charge-discharge, electrochemical impedance spectroscopy, leakage current, self-discharge, and cycle life measurements. The results