Monocrystal LiMn_(0. 6)Fe_(0. 4)PO_4 cathode material was obtained via hydrothermal method at 180℃ for 10 h without any surfactant. The effects of hydrothermal time on the phase and morphology of the material were discussed.By controlling the reaction solutions, the rodlike, flowerlike,and strawlike LiMn_(0.6)Fe_(0.4)PO_4 cathode materials were synthesized. Electrochemical performances show that the rodlike LiMn_(0. 6)Fe_(0. 4)PO_4 has the best electrochemical properties. The initial discharge capacity of the rodlike structure is 106.4 mAh·g^(-1), which is higher than those of flowerlike and strawlike materials.
Assisted by graphene oxide（GO）,nano-sized LiMn0.6Fe0.4PO4 with excellent electrochemical performance was prepared by a facile hydrothermal method as cathode material for lithium ion battery.SEM and TEM images indicate that the particle size of LiMn0.6Fe0.4PO4（S2）was about 80 nm in diameter.The discharge capacity of LiMn0.6Fe0.4PO4 nanoparticles was 140.3 mAh-g^1 in the first cycle.It showed that graphene oxide was able to restrict the growth of LiMn0.6Fe0.4PO4 and it in situ reduction of GO could improve the electrical conductivity of LiMn0.6Fe0.4PO4 material.
