Study Of Transition Metal Oxide As Anode Material For Lithium Ion Battery

Lithium ion batteries have become the power source of choice for modern portable electronic equipment because of their high energy densities and long cycle life. To match the growing demand for LIBs, better electrochemical performance is needed. Transition metal oxide are promising electrode materials for LIBs because of their high specific capacity and better electrochemical performance. The composition、structure and morphology of electrode materials is very important to its electrochemical performance. Through the optimization of the synthesis process, preparing transition metal oxide anode materials with special structure and morphology. This makes it have excellent electrochemical performance.This article uses Co(NO3)26·H2O, MnSO4·H2O, NH4HCO3as raw materials to synthesis the CoMn2O4micro-cube via a co-precipitation and annealing method, and analysis the synthesis craft. Synthesis the process parameter amont temperature and striring speed of process by XRD and SEM to make sure the effect on the material structure and particle size. Use the CoMn2O4/C to assemble a single cell as anode material. The first discharge capacity is895mAhg-1. After30cycles, a high discharge capacity of450mAhg-1is still retained, corresponding to50%of the second discharge capacity.Porous ZnMn2O4micro-spheres was prepared by the hydrothermal and annealing method. The crystalline phase and the morphology were characterized by XRD and SEM respectively. The reaction process factors, including reaction time, reaction temperature and reaction medium play a key role to the morphology and crystalline phase. The micro-spheres is prepared as:200℃/24h/water and glycol as solvent. When the reaction time was extended to48h, the morphology is change to micro-capsule. The first discharge capacity of micro-sphere reached1025mAhg-1...