LITHIUM-METAL COMPOSITE OXIDES AND ELECTROCHEMICAL DEVICE USING THE SAME

摘要

Disclosed is a lithium-containing metal composite oxide comprising paramagnetic and diamagnetic metals, which satisfies any one of the following conditions: (a) the ratio of intensity between a main peak of 0 ± 10 ppm (IoPPm) and a main peak of 240 ± 140 ppm (I240pPm), Uoppm / l24oPPm), is less than 0.117 Z wherein Z is the ratio of moles of the diamagnetic metal to moles of lithium; (b) the ratio of line width between the main peak of 0 ± 10 ppm (IoPPm) and the main peak of 240 + 140 ppm (I24oPPm), (W24oPPm / WOppm), is less than 21.45; and (c) both the conditions (a) and (b), the peaks being obtained according to the 7Li-NMR measurement conditions and means disclosed herein. Also, an electrode comprising the lithium-containing metal composite oxide, and an electrochemical device comprising the electrode are disclosed. The lithium-containing multicomponent metal composite oxide shows crystal stability and excellent physical properties as a result of an improved ordering structure of metals, in which the components of the composite oxide are uniformly distributed. Thus, it can provide a battery having high capacity characteristics, long cycle life characteristics and improved rate characteristics.