Research progress in lithium iron phosphate as cathode material

The cathode materials of lithium ion battery are developed towards the direction of high specific energy,long cycling life,low cost,and environmental benignity,while LiFePO4 would be most promising green battery in the 21st century for its stable structure,low cost,and no pollution.Recent research status of lithium iron phosphate,a new kind of cathode materials for lithium ion batteries,was reviewed.The crystal structures,the performance of lithium iron phosphate,the methods of preparation,the doping of multi-conductive materials and the control of crystal size to gain nano-powder were reviewed and evaluated.In addition,the study direction of this cathode material was also presented.