球形多孔氧化钴/碳复合材料的制备及电容性能研究  

Preparation and Capacitive Properties of Spherical Porous Co_3O_4/C Composite Material

作　　者：樊阳[1] 刘培芳[1] 崔影[2] 

机构地区：[1]信阳师范学院化学化工学院,河南信阳464000 [2]信阳师范学院华锐学院,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2015年第4期533-537,共5页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省高校科技创新人才支持计划(13HASTIT012);河南省教育厅科学技术研究重点项目(12A150020);河南省高校青年骨干教师资助计划(2012GGJS-128)

摘　　要：采用水热合成和煅烧制备氧化钴/碳(Co3O4/C)复合材料,通过SEM、XRD、N2吸附实验等对该材料进行表征.制备的Co3O4/C复合材料为5μm大小,孔径约为30nm的多孔球形结构.在6mol/L的氢氧化钾溶液中进行电化学测试.结果表明,Co3O4/C复合材料具有良好的电容性能.在电流密度为1A/g时,比电容为143F/g.此外,Co3O4/C复合材料还表现出良好的循环稳定性,在1A/g的电流密度下,充放电循环1000次后,比电容保持率为77.8%.The spherical porous cobalt oxide/carbon（Co3O4/C）composite material was prepared via hydrothermal synthesis and calcination.The structure of the as-synthesized Co3O4/C was characterized by scanning electron microscopy（SEM）,X-ray diffraction（XRD）and N2 sorption measurements.Structure characterizations showed that high crystalline Co3O4/C composite material had average size of 5μm and pore size in the range of 30 nm.The electrochemical capacitive properties of Co3O4/C in 6mol/L KOH solution were investigated by cyclic voltammetry（CV）,chronopotentiometry and electrochemical impedance spectroscopy（EIS）measurements.The results showed that Co3O4/C composite material had good capacitive performance with specific capacitance of 143F/g at a current density of 1A/g.The capacity retention was 77.8% after 1000 cycles at a current density of 1A/g.

关 键 词：氧化钴 超级电容器 纳米复合材料 

分 类 号：O646.5[理学—物理化学]