Development and industrialization progress of olivine-type LIB cathode materials for energy storage systems and electric vehicles
Olivine type LiMePO4 is a one of the most widely commercial cathode materials for lithium-ion batteries(LIBs),due to its low cost,long cycle life,good safety,and environmental friendliness.However,this type of material has inherent defects such as low electronic conductivity,poorLi+diffusion coefficient,and small pellet density,which hinder its expansion and application in high-performance batteries for energy storage systems,electric vehicles,and aviation.In this paper,the research and development progress of LiMePO4 cathode materials in terms of crystal structure,electronic structure,industrialization process route,existing problems,and modification strategies are comprehensively summarized.The internal mechanisms of doping and nanocrystallization to increase the electrochemical performance are analyzed,and the protective principles such as surface coating and new structural design are outlined in detail.The combination of these modification strategies can effectively improve the electronic conductivity,lithium ion diffusion coefficient,pellet density of LiMePO4,achieving novel battery designs with higher rate performance,longer cycle life,and higher energy density.Finally,the future development prospects of olivine-type cathode materials in the directions of energy density improvement,continuous cost reduction,and commercial application for solid-state batteries are discussed.
lithium-ion batteriesolivine-type cathode materialsindustrialization process routedopingsurface coatingnew structural design
万方数据
维普
