| 摘要 |
Disclosed is a method for producing a positive electrode active material layer, wherein a high-purity lithium complex oxide can be obtained by suppressing generation of impurities, a flat film can be obtained, and orientation control is possible. Specifically disclosed is a method for producing a positive electrode active material layer, wherein a positive electrode active material layer containing LiXaOb (wherein X represents at least one transition metal element selected from the group consisting of Co, Ni and Mn, a = 0.7-1.3 and b = 1.5-2.5) is formed on a substrate. The method is characterized by comprising a positive electrode active material precursor film forming step wherein a positive electrode active material precursor film is formed on the substrate by physical vapor deposition while setting the temperature of the substrate to 300°C or less, and an annealing step wherein the positive electrode active material precursor film is subjected to annealing at a temperature not less than the temperature at which the LiXaOb can be crystallized. The method is also characterized in that the substrate has an orientation in the surface. |
