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

Co3O4/C composites with microsphere structure were prepared by heat treatment of Co-based metal-organic framework (MOF). The structure and composition of Co3O4/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 Co3O4/C calcined at 600 degrees C is 1554.25 mA h g(-1). After 60 times of charging and discharging at different current densities, Co3O4/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 Co3O4/C-600 is due to the structure which is dispersed on the carbon substrate and the excellent specific surface area. Therefore, Co3O4/C composite is considered as promising anode material for lithium batteries.