A combustion method to prepare spinel phase LiMn_2O_4 cathode materials for lithium-ion batteries

摘要

Spinel phase LiMn_2O_4 is of great interest as cathode materia1s for lithium-ion batteries. We describe here a new simplified technique (Combustion method) to synthesize LiMn_2O_4 directly from lithium nitrate, manganese nitrate and urea. The influence .fth. Li/Mn ratio of product, the mole ratio of urea to nitrate, the preset temperature of the furnace and the heat--treated time have been explored. The resultant LiMn_2O_4 synthesized under the optimum synthesis conditions shows perfect spinel structure, uniform particle size distribution and excellent electrochemical performances.