METHOD FOR PRODUCING NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

[Problem] To realize uniform reaction inside electrodes and prevent a reduction in durability. [Solution] Provided is a method for producing a nonaqueous electrolyte secondary cell which includes: a positive electrode; a negative electrode; and an electrolyte containing an electrolyte salt, nonaqueous solvents capable of dissolving the electrolyte salt, and multiple additives. At least one of the additives has a reduction potential that is more noble than the reduction potential of the nonaqueous solvent. The method for producing a nonaqueous electrolyte secondary cell has an initial charging step which includes: a first charging step for maintaining the cell voltage at the negative electrode potential under which the additive having the most noble reduction potential of the additives is decomposed while the nonaqueous solvents and other additives are not reduced and decomposed; and a second charging step for maintaining cell voltage so as to induce reduction and decomposition of at least one nonaqueous solvent and bring the potential of the negative electrode to at least 0.7V vs. lithium.