Effect Of Sintering Temperature On The Electrochemical Performance Of Li-Rich Mn-Basfed Cathode Material Li1.2mn0.54ni0.13co0.13o2 By Co-Precipitation Method

The multi-void spherical structure of Li-rich Mn-based cathode materials was successfully prepared with an improved co-precipitation method using acetate as the system. By XRD, TEM, and SEM characterization and observation, the materials at the sintering temperature of 800 degrees C have a favorable crystal structure and lamellar structure, and it has more uniform primary particle and secondary particle morphology under SEM. The electrochemical results show that the initial discharge capacity of LMNCO-800 at 0.1C is 239.2 mAh/g. At high rates of 0.5C and 2C, it can provide capacities of 200.2 mAh/g and 145.0 mAh/g, and the capacity retention rates of 200 cycles are 85.11% and 88.21%, respectively. It can be seen more intuitively from the capacity decay and dQ/dV diagrams at 1C that the capacity decay trend of the material is more stable when the sintering temperature is 800 degrees C, which is more helpful to stabilize the structure and delay the transformation of the layered structure to the spinel structure.