Abstract
LiNi0.5Mn1.5O4 has been synthesized by carbonate co-precipitation method in which we got the precursor that was pretreated with H2O2 (an oxidant), in order to oxidize part of Mn 2+ to Mn 4+ ,results in a decrease of Mn 3+ in the structure. Result in the average valence of Mn is approximately 4 in the LiNi0.5Mn1.5O4 structure, leading to an improved structural stability. The sample was characterized by XRD (X-ray diffraction) and SEM (Scanning Electron Microscope) test, respectively. The XRD results show that peaks of the sample are consistent with that of standard LiNi0.5Mn1.5O4.The SEM pattern shows that there are complete octahedron exists, the result indicate that material structure is an intact spinel structure. In addition, electrochemical properties have been tested. The first discharge capacity is 100.8mAh g -1 at 0.25 C. And cycling performance was tested, it is also preferable.
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