The influence of different calcination temperatures and times on the chemical performance of LiNi0.5Mn1.5O4 cathode materials

Under the premise of the freeze-drying method, the influence of the calcination temperature on the performance of the LiNi0.5Mn1.5O4 cathode material was explored. After determining the calcination temperature, the effect of calcination time on the LiNi0.5Mn1.5O4 cathode material was further studied. XRD, SEM, FT-IR, and a series of electrochemical tests were used to analyze the prepared materials. Through the experiment, the LiNi0.5Mn1.5O4 material prepared at 800 degrees C has completely crystallized under the same time (12 h), with no impurity peaks, and with uniform particle size; the initial discharge capacity was 107.5 mAh center dot g(-1) at 0.1 C. After the calcination temperature (800 degrees C) was determined, the material was sintered at 8, 12, 16, and 20 h. The material had sharp diffraction peaks, in complete crystal form, no LixNi1-xO impurity peak, and had good dispersion in the sample. At 5.0 C, the discharge capacity was 56.4 mAh center dot g(-1).