Electrochemical Study of K+-Doped LiNi0.5Co0.2Mn0.3O2 Prepared by Co-Precipitation Freeze-Drying Method

LiNi0.5Co0.2Mn0.3O2 lithium-ion battery cathode material is considered to be one of the most promising cathode materials for development. The co-precipitation-freeze-drying method was used to add K+ to the materials to investigate the changes in the microstructure as well as the electrochemical properties of the materials. Specifically, K+-doped LiNi0.5Co0.2Mn0.3O2 cathode materials were successfully synthesized by the co-precipitation-freeze-drying method, and the prepared Li _1 - x KxNi0.5Co0.2Mn0.3O2 materials were well-distributed and exhibited excellent electrochemical properties. Providing an initial discharge capacity of 189.26 mA h g–1 capacity retention of 66.66