METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY CELL

By having a uniform reaction in an electrode, a decrease in durability is suppressed. A method for producing a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode, and an electrolyte containing an electrolyte salt, a non-aqueous solvent capable of dissolving the electrolyte salt, and plural additives, wherein at least one of the additives has a reduction potential that is nobler than the reduction potential of the non-aqueous solvent, and the method includes an initial charging step including a first charging step for maintaining battery voltage at a negative electrode potential at which the additive having the noblest reduction potential of the additives is decomposed while the non-aqueous solvent and other additives are not reduced and decomposed and a second charging step for maintaining battery voltage so as to have reduction and decomposition of at least one of the non-aqueous solvents and bring the electrical potential of the negative electrode to at least 0.7 V relative to lithium.