Abstract:Based on synthesizing pure spinel type lithium manganese oxides, the derivations such as LiMn_1.5Ti_0.5-O₄,LiMn_1.5Fe_0.5O₄, LiMn_1.5Ni_0.5O₄ and LiMn_1.5Zn_0.5O₄were prepared using solid -step- sintering method. The structures were characterized by using XRD, SEM and laser granulometer. The electrochemical measurement results show that the element of iron or nickel can raise the discharging plateau voltage of LiMn₂O₄, and element titanium improves the electro-
chemistry property of LiMn₂O₄little, while element zinc destroys the electrochemistry property of LiMn₂O₄. The influence of elements of titanium, iron, nickel, or zinc on the structure of LiMn₂O₄pure phase was discussed from the view point of structural chemistry.

Key words: lithium-ion battery; cathode material; lithium manganese oxide; derivations; characterization