| abstract |
An object of the present invention is to provide a positive electrode material for a nonaqueous electrolyte secondary battery, which is capable of inhibiting the gelation of a positive electrode composite material paste without decreasing the charge and discharge capacity and the output characteristics, when used as a positive electrode material for batteries. The positive electrode active material for a nonaqueous electrolyte secondary battery comprises a mixture containing a lithium metal composite oxide represented by a general formula LiaNi1-x-y-zCoxMnyMzO2 (wherein, 0.03≤x≤0.35, 0≤y≤0.35, 0≤z≤0.05, 0.97≤a≤1.30, and M is at least one type of element selected from V, Fe, Cu, Mg, Mo, Nb, Ti, Zr, W and Al) and an ammonium tungstate powder, wherein when 5 g of the positive electrode material is mixed with 100 ml of pure water, the mixture is stirred for 10 minutes and then left to stand for 30 minutes, and then the pH of a supernatant fluid at 25° C. was measured, the pH ranges from 11.2 to 11.8. |