NON-AQUEOUS ELECTROLYTIC SECONDARY BATTERY

摘要

[Object] Provided is a non-aqueous electrolyte secondary battery that allows gas, which is generated when an aqueous binder is used as a binder of a negative electrode active material, to be effectively discharged from the electrode, and has small decrease of the battery capacity despite use over a long period of time. [Solving Means] Disclosed is a non-aqueous electrolyte secondary battery that has a power generating element containing a positive electrode in which a positive electrode active material layer is formed on a surface of a positive electrode current collector, a negative electrode in which a negative electrode active material layer containing an aqueous binder is formed on a surface of a negative electrode current collector, and a separator that is disposed between the positive electrode active material layer and the negative electrode active material layer, wherein the density of the negative electrode active material layer is 1.4 to 1.6 g/cm 3 , an electrolyte solution layer is disposed between at least one layer of the negative electrode active material layer and the positive electrode active material layer, and the separator, and the ratio of total thickness of the positive electrode, the negative electrode and the separator to total thickness of the positive electrode, the negative electrode, the separator and the electrolyte solution layer, is 0.85 or more and less than 1.0.