中孔炭的制备及其在超级电容器中的应用  

Template synthesis of mesoporous carbon and its application in supercapacitors

作　　者：李娜[1] 王先友[1] 魏建良[1] 安红芳[1] 郑丽萍[1] 

机构地区：[1]湘潭大学化学化工学院,湖南湘潭411105

出　　处：《中南大学学报（自然科学版）》2009年第3期601-607,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(20475080;20673092);"十一五"国防基础研究项目(A3720061186)

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角有序分布；该样品的孔体积为1．88cm3／g，比表面积为1394m2/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3．4nm；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500mA／g的充放电电流密度下，循环10000次的平均比电容高达95F/g，比容量波动范围仅为-4％-4％。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 show that the sample possesses two-dimensional （2-D） hexagonally ordered mesoporous structure, and the pore volume of the sample is 1.88 cm3/g, the specific surface area is 1 394 m2/g; it possesses mesoporous structure and narrow pore size distribution, the average pore size is 3.4 nm. The supercapacitor has good electrochemical performance, the specific capacitance is 95 F/g at a charge/discharge current density of 500 mA/g after 10 000 cycles, and specific capacitance fluctuates between -4% and 4%.

关 键 词：中孔炭 电极材料 超级电容器 比电容 

分 类 号：TB383[一般工业技术—材料科学与工程] O613.71[理学—无机化学]