Abstract:

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 .