Research progress in rate performance of LiFePO_4 cathode materials

Olive structure lithium iron phosphate LiFePO4 is considered as a promising cathode material for lithium ion power battery due to its high theoretical capacity,high safety,long cycle life,environmental benign and abundant raw material source.However,the instinct drawbacks of olive structure induces a poor rate performance.In this paper,methods for enhancing its rate performance are reviewed,including carbon coating,cation doping,synthesis nanoscale materials and preparing porous materials,etc.Among all the methods,LiFePO4 microsphere material,assembled by nanoparticles basic structure,displayed high rate performance and high volume energy density,has vast prospection.