Abstract: LiMn₂O₄ cathode materials were synthesized by high-temperature solid-state reaction method at different temperatures.Structure，morphology，and electrochemical properties of the samples synthesized at different temperatures were tested by X-ray diffraction（XRD），scanning electronmicroscopy（SEM），and galvanostatic charge-discharge test.Results showed that LiMn₂O₄ cathode material synthesized at 850 ℃ had optimal electrochemical properties and exhibited a initial discharge capacity of 120.7 mA·h/g at 0.1 C（1 C=148 mA·h/g）rate and the capacity retention rate was 95.2% after 20 charge-discharge cycles.

Key words: LiMn₂O₄, spinel, calcination temperature, high-temperature solid-state method, electrochemical performance