Co_3O_4晶体的水热合成及其电化学性能  

Hydrothermal Synthesis and Electrochemical Properties of Co_3O_4 Crystals

作　　者：刘国聪[1,2] 

机构地区：[1]惠州学院化学工程系,广东惠州516007 [2]惠州学院新材料研发和化学生物传感技术所,广东惠州516007

出　　处：《惠州学院学报》2015年第6期1-5,19,共6页Journal of Huizhou University

基　　金：广东省高等学校人才项目([粤财教[2012]41;[2013]246号183);惠州市天鹅计划项目(2014008);惠州学院团队项目(20141121004528085)

摘　　要：本文以Co SO_4·7H_2O、Co Cl·6H_2O、草酸钠、尿素为原料,采用SDBS辅助简单水热法制备了Co_3O_4微米球,并用XRD、XPS、SEM、IR、Raman等技术对样品进行表征,结果表明,产物均是结晶度高的立方尖晶石型的Co_3O_4,样品颗粒呈球形。样品的恒电流充放电及其循环性能测试表明,四氧化三钴样品具有较好的首次充放电容量,其最大充电和放电容量分别为1100和1700 m Ah/g。四种四氧化三钴样品在25次内的充放电衰减顺序是:XX-4<XX-10<XX-6<XX-2。With Co SO4·7H2O, Co Cl2·6H2O, sodium oxalate, urea as materials, a simple hydrothermal method assisted by SDBS was used to prepare Co3O4 microspheres. The products were characterized by XRD, XPS, SEM, IR and Raman technologies. Results show that the obtained Co3O4 crystals belong to pure cubic spinel, and exhibit spherical shape. The charge discharge capacity and cycle performance of the as-prepared Co3O4 crystals were studied using constant current charge discharge test and rate performance testing method. It is found that four samples possess good first charge-discharge capacities. The maximum charge and discharge capacity are1100 and 1700 m Ah/g respectively. Within 25 times, the Charge-discharge decay sequence is XX-4XX-10XX-6XX-2

关 键 词：水热合成法 CO3O4 电流密度 充放电容量 库伦效率 

分 类 号：TQ135[化学工程—无机化工]