| abstract |
A positive electrode active material having good thermal stability and high charge / discharge capacity is provided. SOLUTION: Li 1 + z Ni 1-xy Co x Ti y O 2 (where 0.10 ≦ x ≦ 0.21, 0.03 ≦ y ≦ 0.08, −0.05) ≦ z ≦ 0.10), a method for producing a positive electrode active material for a non-aqueous electrolyte secondary battery, wherein an alkaline solution is added to a mixed aqueous solution of nickel salt and cobalt salt and a sulfuric acid aqueous solution of titanyl sulfate, The composite hydroxide Ni 1-xy Co x Ti y obtained by coprecipitation of hydroxides of nickel, cobalt and titanium under the conditions of not lower than 80 ° C. and not higher than 80 ° C. and not lower than pH 10 and not higher than pH 12.5 (OH) 2 (where 0.10 ≦ x ≦ 0.21, 0.03 ≦ y ≦ 0.08) was heat-treated at a temperature of 300 ° C. or higher and lower than 900 ° C., and the resulting nickel cobalt titanium composite oxide The product is mixed with a lithium compound and 650 ° C or higher and 850 ° C or lower Heat treatment at lower temperature. [Selection] Figure 1 |