Structure Control of Spinel Oxides of Cathode for Lithium Ion Batteries

Abstract

Partially substiuted lithium mannganese spinel oxides are promising for the cathode active material at 4V range for lithium ion batteries. WhileLiNi_0.5Mn_1.5O₄ has an ordered-type structure and shows high capacity on the charge-discharge at 5V range. It became clear that the introduction of defect in the latter spinel oxides forms a disordered-type structure whichleads to high rate capability compared with the stoichiometric phase. Coulombpotential calculation by MD simulation showed that easier diffusion of lithiumin the disoredred-type structure. This result strongly supported the experimental data. In my lectrure the relation of the structure control and the rate property will be introduced.