| abstract |
PROBLEM TO BE SOLVED: To provide a positive electrode for constituting a nonaqueous electrolyte secondary battery excellent in safety at high temperature storage while achieving high capacity, and a nonaqueous electrolyte secondary battery having the positive electrode. A positive electrode for a non-aqueous electrolyte secondary battery having a positive electrode mixture layer composed of a positive electrode mixture containing a positive electrode active material, a conductive additive and a binder, the positive electrode mixture Is the general formula Li (1 + δ) Mn x Ni y Co (1-xy) O 2 (0 ≦ δ ≦ 0.05, 0.1 <x ≦ 0.5, 0.1 <y ≦ 0.5) 0.6 <x + y ≦ 1.0) as a positive electrode active material, and a carbon material having a specific surface area of 50 to 1000 m 2 / g as a conductive auxiliary agent. Neutralization titration (A) obtained by neutralizing titration of supernatant obtained by immersing 2.5 g of positive electrode mixture in 50 g of neutral water with sulfuric acid having a concentration of 0.01 mol / l Is a positive electrode for a non-aqueous electrolyte secondary battery of 4.5 ml or less, and a non-aqueous electrolyte secondary battery having the positive electrode. |