| abstract |
The present invention relates to a positive electrode material for a lithium ion battery comprising a lithium-excess type layered lithium metal composite oxide, which provides an electrode with an increased volume energy density and exhibiting a good rate characteristic. Wherein M is at least one selected from the group consisting of Ni, Co, Al, Mg, Ti, Fe, and Nb and M is at least one selected from the group consisting of Li 1 + x M 1 - x O 2 a method for producing a lithium excess layered lithium metal composite oxide represented by include or more kinds of elements), the general formula Li 1 + x M 1 - x O 2 (x = -0.15~0.15, M is necessarily include Mn And at least one element selected from the group consisting of Ni, Co, Al, Mg, Ti, Fe and Nb) and a lithium compound are mixed and fired to form a lithium- Thereby obtaining a lithium-excess layered lithium metal composite oxide having a step of obtaining a layered lithium metal composite oxide. |