| 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 is capable of increasing the volume energy density as an electrode and exhibiting good rate characteristics. (X = 0.1 to 0.33, y = 0 to 0.3, Ma necessarily contains Mn and further contains at least one or more elements selected from Ni and Co) represented by the general formula Li 1 + x Ma 1 -xy Mb y O 2 And Mb is at least one or more elements selected from the group consisting of Al, Mg, Ti, Fe and Nb), and a lithium metal complex oxide having a layer structure The positive electrode material for a lithium ion battery is characterized by having an average primary particle diameter of 1.0 탆 or more and a tap density of 1.9 g / cm 3 or more. |