MOF-Derived Co3O4/C Microspheres As High-Performance Anode Materials for Lithium-Ion Batteries

Co 3 O 4 /C composites with microsphere structure were prepared by heat treatment of Co-based metal-organic framework (MOF). The structure and composition of Co 3 O 4 /C material were studied by X‑ray diffraction (XRD), scanning electron microscopy (SEM), and other test methods. In the voltage range of 0.01–3.0 V and the current density of 0.05 A g –1 , the initial capacity of Co 3 O 4 /C calcined at 600°C is 1554.25 mA h g –1 . After 60 times of charging and discharging at different current densities, Co 3 O 4 /C-600 has excellent rate performance and maintains a specific capacity of 1042 mA h g –1 at a current density of 0.05 A g –1 . The good rate performance of Co 3 O 4 /C-600 is due to the structure which is dispersed on the carbon substrate and the excellent specific surface area. Therefore, Co 3 O 4 /C composite is considered as promising anode material for lithium batteries.