Method for producing positive electrode active substance for non-aqueous electrolyte secondary battery

A method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery, the method comprising:

• washing with water and dehydrating a lithium-containing transition metal oxide to obtain a cake-like composition;
• adding tungsten by adding at least one of a tungsten compound or a tungsten-containing solution to the cake-like composition to obtain a tungsten additive;
• first heat treating that heat treats the tungsten additive at a temperature of 180° C. or lower;
• and
• second heat treating that heat treats the tungsten additive at a temperature in a range from over 180° C. to 330° C. in an atmosphere other than a reducing atmosphere,
• wherein the method further comprises adding boron by adding a boron compound or a boron-containing solution to the cake-like composition before the adding of tungsten, to the tungsten additive before the first heat treating, to the tungsten additive before the second heat treating after the first heat treating or to the tungsten additive during the second heat treating after the first heat treating.