LiNi1/2Mn3/2O4 as a 5V cathode material, was prepared by low heating solid-state reaction with heating the mixed precursors at 500, 600, 700°C. X-ray diffraction patterns of the prepared samples are identified as the spinel structure with a space group of F d 3 ¯ m . Scanning electron microscope was used to study the morphology of the synthesized LiNi1/2Mn3/2O4 powders. The charge–discharge curves of the samples synthesized by low-heating solid-state reaction appear a plateau at 4.7V.