| 摘要 |
An opening of a packaging member containing a positive electrode, a negative electrode, and a non-aqueous electrolyte solution is temporarily sealed to produce a temporarily sealed battery. The temporarily sealed battery is initially charged so that a negative electrode potential becomes higher than 0.8 V and 1.4 V or lower (versus Li/Li + ), and is stored in an atmosphere of 50°C or higher and lower than 80°C. Thereafter, gas is discharged from the temporarily sealed battery, and the temporarily sealed battery is finally sealed to produce a non-aqueous electrolyte secondary battery. Lithium titanate with a spinel structure, lithium titanate with a ramsdellite structure, Li 4+x Ti 5 O 12 , Li 2+x Ti 3 O 7 , a titanic acid compound given by the general formula H 2 Ti n O 2n+1 , or a monoclinic titanium composite oxide such as a bronze titanium oxide may be used as the titanium composite oxide. |
