中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 32 No. 4 April 2022 |
（1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional Materials, Changsha 410083, China;
3. School of Metallurgy and Environment, Central South University, Changsha 410083, China）
Abstract:Hierarchical porous Co3O4 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 Co3O4 spheres. The results show that the Co3O4 synthesized at a calcination temperature of 700 °C (Co3O4-700) is micro-sized spheres (1-2 μm) consisting of plentiful nanoparticles (50-200 nm) and numerous pores (~100 nm). Due to its numerous porous morphology, the Co3O4-700 anode exhibits the highest cycling performance with excellent reversible discharge and charge specific capacities of 745 and 755 mA·h/g at the current density of 100 mA/g after 100 charge-discharge cycles, respectively.
Key words: Co3O4; lithium-ion batteries; porous structure; spheres; calcination
