Modification of Li₃V₂(PO₄)₃ cathode material for lithium ion batteries

In recent years, poly anionic phosphate cathode materials for lithium ion batteries are widely concerned by the researchers because of their stable structure and excellent cycling performance. Lithium vanadium phosphate has the theoretical capacity of 197 mAh/g. It has high energy density, high charge and discharge voltage platform and excellent thermal stability. Compared to other cathode materials, it has obvious advantages. But its electronic conductivity is low and not suitable for high current charge and discharge, which limits its practical application, we must carry on the modification research. Current modification methods include coating conductive materials on its surface, metal doping, controlling its morphology etc. In this paper, combined with the structure of lithium vanadium phosphate, we reviewed various modification methods and make a comparative analysis. Furthermore, combined with the research achievements of our team, the existing problems and the future research trend are discussed.