NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR PRODUCING NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

The purpose of the present disclosure is to provide a non-aqueous electrolyte secondary battery with suppressed cracks and peeling of a mixture layer while suppressing an increase in the internal resistance of the battery, the internal resistance being increased by a binder contained in the mixture layer. The non-aqueous electrolyte secondary battery according to an aspect of the present disclosure comprises: a wound electrode body on which a strip-like positive electrode (11) and a strip-like negative electrode (12) are each wound with a separator interposed therebetween; and an outer package accommodating the electrode body. The positive electrode (11) comprises a positive current collector (30) and a positive mixture layer (32) that is formed on the positive current collector (30) and contains at least a positive active material and a binder. The negative electrode (12) comprises a negative current collector (40) and a negative mixture layer (42) that is formed on the negative current collector (40) and contains at least a negative active material and a binder. At least one of the positive mixture layer (32) and the negative mixture layer (42) has a binder content that is higher on a leading end (42a) than on a terminal end (42b).