溶剂热制备绒球状ZnCo2O4/CNT多孔微球

摘要

The cinc cobaltate (ZnCo2O4)/carbon nanotube (CNT) composite microspheres with porous floccule structure were prepared by solvothermal method.The phase and morphology were analyzed by XRD and SEM,the electrochemical performance was measured by galvanostatic charge-discharge and cyclic vohammetry.The porous structure of ZnCo2 O4 was exhibited by CNT,which could improve the electrochemical performance as anode material of Li-ion battery.When cycled in 0.01-3.00 V with the current of 500 mA/g,the initial specific charge and discharge capacity of ZnCo2O4/CNT were 1 002.3 mAh/g and 1 284.9 mAh/g,respectively,and the initial coulombic efficiency was 78.00％.The specific charge and discharge capacity of the 50th cycle were 1 197.2 mAh/g and 1 209.8 mAh/g,and the coulombic efficiency was up to 98.96％.%用溶剂热法制备绒球状钴酸锌(ZnCo2O4)/碳纳米管(CNT)复合材料.用XRD、SEM技术分析物相和形貌,用恒流充放电及循环伏安法测试电化学性能.添加CNT使ZnCo2O4呈多孔结构,可提高作为锂离子电池负极材料的电化学性能.以500 mA/g的电流在0.01～3.00 V循环,ZnCo2O4/CNT的首次充、放电比容量分别为1 002.3 mAh/g、1 284.9 mAh/g,首次库仑效率达78.00％;第50次循环的充、放电比容量分别为1 197.2 mAh/g、1 209.8 mAh/g,库仑效率达98.96％.