| abstract |
Provided is a positive electrode material for a lithium ion battery comprising a lithium-excess layered lithium metal composite oxide that increases the volume energy density of the electrode and exhibits good rate characteristics. General formula Li 1 + x M 1-x O 2 (x = 0.10 or more and 0.33 or less, M always includes Mn, and at least selected from the group consisting of Ni, Co, Al, Mg, Ti, Fe and Nb) A lithium-excess layered lithium metal composite oxide represented by the general formula Li 1 + x M 1-x O 2 (x = −0.15 to 0.15, M necessarily contains Mn, and includes at least one element selected from the group consisting of Ni, Co, Al, Mg, Ti, Fe, and Nb.) A method for producing a lithium-excess layered lithium metal composite oxide comprising the steps of mixing and baking to obtain a lithium-excess layered lithium metal composite oxide is proposed. |