关键词: 磷酸铁锂, 锂离子电池, 正极材料

Abstract: Olivine-type lithium iron phosphate (LiFePO₄) has been regarded as one of the most promising cathode material for Li-ion battery because of its safety,environmental  protection,high specific capacity,excellent cycle performance,and good electrochemical property at high temperature compared with LiCoO₂ and LiNiO_2.At the same time,LiFePO₄ became the most suitable candidate for the cathode material of high-power electrokinetic batteries,as it had long cycle life,high rate discharge performance,broad discharge platform,large energy density,and good thermal stability.On the other hand,the disadvantages,such as poor electronic conductivity,small diffusing coefficient,low tap density,and bad low-temperature performance,constrained its development and application.Recent research progress of LiFePO₄ in terms of its structure,electrochemical property,preparation,and modification was also reviewed.

Key words: lithium iron phosphate, lithium ion battery, cathode material