Co3O4纳米片的制备及其电化学性能  

Preparation and electrochemical performance of Co_3O_4 nanosheet

作　　者：朱刚[1] 李江涛[1] 蔡科[1] 杨晓慧[1] 

机构地区：[1]西安文理学院化学工程学院,陕西省表面工程与再制造重点实验室,西安710065

出　　处：《化工新型材料》2016年第11期55-56,60,共3页New Chemical Materials

基　　金：西安市科技计划项目(CXY1443WL28);陕西省科技厅项目(2014JQ2059)

摘　　要：以六水合硝酸钴[Co(NO_3)_2·6H_2O]为钴源、六次甲基四胺[CH_2)_6N_4]为水解剂,采用均相沉淀法制得β-氢氧化钴[β-Co(OH)_2]。β-Co(OH)2前驱体在400℃经煅烧2h制得四氧化三钴(Co_3O_4)材料。用X-射线衍射和扫描电镜对前驱体和目标产物进行了表征。结果表明,所得Co_3O_4为二维片状。电化学测试结果显示,Co_3O_4负极材料具有高的比容量和良好的循环性能。在100mA/g的电流密度下,首次充电比容量达到827mAh/g。恒流充放电50次后,容量保持率为88.5%。β-Co（OH）2 was first prepared via homogeneous precipitation using Co（NO3）2 ·6H2O as a cobalt source and （CH2）6N4 as a hydrolysis agent. Then,Co3O4 was obtained after β-Co（OH）2 precursor was calcined at 400℃ for 2h. The precursor and target product were characterized by X-ray diffraction and scanning electron microscopy. The result showed that the obtained Co3O4 had nanosheet morphology. Electrochemical measurements indicated that Co3O4 had high specific capacity and good cycling performance as cathode material. It exhibited an initial charge capacity of 827mAh/g at the current density of 100mA/g. And the capacity retention reached 88.5 % after 50 cycles.

关 键 词：四氧化三钴 纳米片 均相沉淀 煅烧 负极材料 

分 类 号：TM912[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]