铜掺杂钴氧化物Cu_xCo_(3-x)O_4的制备及其电化学电容性能  

Preparation and electrochemical performance of copper doping cobalt oxides Cu_xCo_(3-x)O_4

作　　者：梁鹏举[1] 张亚军[1] 张富海[1] 张海英[1] 杨玉英[1] 张子瑜[1] 胡中爱[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,兰州730070

出　　处：《化工新型材料》2012年第5期68-70,80,共4页New Chemical Materials

基　　金：国家自然科学基金(20963009);甘肃省自然科学基金资助项目(0803RJA005)

摘　　要：采用X射线衍射(XRD)、场发射扫描电镜(FESEM)对铜掺杂钴氧化物(CuxCo3-xO4)纳米粒子样品的结构和形貌进行了表征;用循环伏安,恒流充放电,交流阻抗等电化学方法对其电化学性能进行了测试。结果表明:钴和铜的摩尔比对目标产物的电化学性能有显著的影响,当钴和铜的摩尔比为2.67∶0.33时,样品的电化学性能最佳。在电流密度为1A/g时,比电容达到492F/g,且在3A/g的电流密度下,经过2000次充放电循环后,其比电容值没有衰减,表明Cu0.33Co2.67O4是一种良好的超级电容器电极材料。The Cu-doping cobalt oxide nanoparticles were successfully prepared by heating CtrCo layered double hydrox ides for 4 h at 200℃ ,which were obtained by a chemical co-precipitation method using Co（NO3 ）2 ·6H2O and Cu（NO3 ）2· 3H2O as raw material and polyethylene glycol 6000 as structure-directing agent. The structure and morphology of obtained samples were characterized by X-ray diffraction （XRD） and field emission scanning electron microscopy （FESEM）, respectively. The electro- chemical performances were investigated by several electrochemical techniques such as cyclic vohammetry,galvanostatic charge-dis- charge and electrochemical impedance spectroscopy. It was found that molar ratio of Coe＋ to Cue＋ had significant influence on elec- trochemical capacitive behaviors of the resultant products. Cu doping cobalt oxides with optimal molar ratio up to 2. 67：0. 33 （Co^2＋ to Cu^2＋ ） exhibited excellent specific capacitance （492F/g） at a current density of 1A/g.

关 键 词：超级电容器 化学共沉淀 铜掺杂钴氧化物(CuxCo3-xO4) 

分 类 号：TM53[电气工程—电器]