Modification of LiMn₂O₄ Surface using Surfactant Micelles

抄録

A simple technique has been developed to surface modification from liquid solution by the solvent evaporation method. Using this technique, the preparation of lithium manganese oxide, LiMn₂O₄, which are the most promising cathode materials for lithium secondary battery, has been carried out for various operating conditions. The as-prepared samples exhibited a monophobic cubic spinel structure (fd3m) without any impurities in the XRD patterns, and the chemical composition of as-prepared powders showed in a good agreement with the one of precursor solution.
The as-prepared sample was used as cathode active materials for lithium secondary battery and their charge/discharge properties have been investigated. Test experiments in the electro chemical cell Li|1M LiPF6 in EC with DEC|LiMn2O4 demonstrated that the sample, prepared by the solvent evaporation method, was a promising cathode material for 4V lithium secondary batteries.