Patent ID: 11005093

Abstract:
A positive electrode active material for a non-aqueous electrolyte secondary battery includes secondary particles of a lithium transition metal complex oxide as a main component. The main component is represented by a formula: Lit(Ni1-xCox)1-yMnyBαPβSγO2, where t, x, y, α, β, and γ satisfy inequalities of 0≤x≤1, 0.00≤y≤0.50, (1−x)·(1−y)≥y, 0.000≤α≤0.020, 0.000≤β=0.030, 0.000≤γ≤0.030, and 1+3α+3β+2γ≤t≤1.30, and satisfy at least one of inequalities of 0.002≤α, 0.006≤β, and 0.004≤γ. The secondary particles exhibit a pore distribution, where a pore volume Vp(1) having a pore diameter of not less than 0.01 μm and not more than 0.15 μm satisfies an inequality of 0.035 cm3/g≤Vp(1) and where a pore volume Vp(2) having a pore diameter of not less than 0.01 μm and not more than 10 μm satisfies an inequality of Vp(2)≤0.450 cm3/g.