Electrochemical Performance of LiMn_2O_4 Synthesized from Precursor Mn_3O_4

A positive active material of spinel LiMn2O4 for lithium-ion batteries was synthesized through a modified solid phase reaction. In this process, LiOH and precursor Mn3O4 obtained from controlled crystallization were mixed togather and incinerated to prepare spinel LiMn2O4. Structure and electrochemical properties of the spinel LiMn2O4 were studied. The results of XRD and SEM prove that the material prepared through above method is a pure phase of spinel LiMn2O4 and the sizes of the crystallites are uniform. Electrochemical property tests show that the spinel LiMn2O4 has excellent eletrochemical properties: its initial discharge specific capacity is 128mAh/g, and the discharge specific capacity of the 10th cycle is still 124mAh/g.