Advances in Stabilizing ‘Layered-Layered’ xLi2MnO3·(1-x)LiMO2(M=Mn, Ni, Co) Electrodes with a Spinel Component

Composite electrode structures with layered and spinel components have been investigated to evaluate the possibility of arresting or suppressing the voltage fade observed on cycling high capacity, lithium- and manganese-rich 'layered-layered' xLi2MnO3•(1-x)LiMO2 (M=Mn, Ni, Co) electrodes in lithium cells. Control of the spinel content in 'layered-layered-spinel' electrode materials and regulating the electrochemical voltage window of the lithium cells enables a capacity of approximately 190 mAh/g with little voltage fade. The results bode well for enhancing the electrochemical properties and structural stability of composite electrode structures on long-term cycling in lithium-ion batteries.