Hierarchical porous Co_(3)O_(4) spheres fabricated by modified solvothermal method as anode material in Li-ion batteries

改进溶剂热法制备锂离子电池负极材料用多级孔Co_(3)O_(4)微球

Hierarchical porous Co_(3)O_(4)spheres were synthesized by a solvothermal method followed by high-temperature calcination.XRD,SEM,TEM and electrochemical tests were used to study the structure and performance of the hierarchical porous Co_(3)O_(4)spheres.The results show that the Co_(3)O_(4)synthesized at a calcination temperature of 700°C(Co_(3)O_(4)-700)is micro-sized spheres(1-2μm)consisting of plentiful nanoparticles(50-200 nm)and numerous pores(~100 nm).Due to its numerous porous morphology,the Co_(3)O_(4)-700 anode exhibits the highest cycling performance with excellent reversible discharge and charge specific capacities of 745 and 755 m A·h/g at the current density of 100 m A/g after 100 charge-discharge cycles,respectively.

将溶剂热法与高温煅烧法相结合制备多级孔Co_(3)O_(4)微球,采用XRD、SEM、TEM和电化学测试等技术研究该多级孔Co_(3)O_(4)微球的结构和性能。结果表明:当煅烧温度为700℃时,所合成的Co_(3)O_(4)(Co_(3)O_(4)-700)是由丰富的纳米颗粒(50~200 nm)和大量孔洞(~100 nm)构成的微米级微球(1~2μm);该Co_(3)O_(4)-700负极材料具有优异可逆的充放电容量,表现出最佳的循环性能:在电流密度为100 m A/g条件下充放电100周后充放电比容量分别为745和755 m A·h/g。