The influence of different drying methods on the properties of LiNi_0.5Mn_1.5O₄ material

It was precisely because LiNi0.5Mn1.5O4 cathode material had many advantages, including high voltage, high power, no pollution, low cost, etc., that it became a research hotspot for lithiumion cathode materials. Although LiNi0.5Mn1.5O4 has a three-dimensional Lithorn diffusion channel, there are still some problems that lead to capacity decay and reduced cycling stability, limiting its commercial application. In this paper, the LiNi0.5Mn1.5O4 cathode material was prepared by the freezing precipitation method. We studied the effects of different drying methods, such as blast drying, water bath drying and freeze-drying on the structure, morphology and electrochemical properties of LiNi0.5Mn1.5O4 cathode materials. The study found that the LiNi0.5Mn1.5O4 cathode material prepared by the precipitation-freeze-drying method had a complete crystal form, a stable structure and no LixNi1-xO impurity peak. The SEM image showed that the particles were smaller and had a smooth surface. The initial discharge-specific capacity at 0.1C was 105.2mAh.g(-1). After 50 cycles, its specific discharge capacity was 99.4mAh.g(-1) and the capacity retention rate was 94.5%. Compared with LiNi0.5Mn1.5O4 materials prepared by other methods, it had better electrochemical performance.