NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

Japanese Patent JP2022160048

A

To provide a non-aqueous electrolyte secondary battery with suppressed capacity degradation.SOLUTION: A non-aqueous electrolyte secondary battery comprises: a positive electrode 10 that has a positive electrode active material layer 14 on a positive electrode core 12; and a negative electrode 20 that has a negative electrode active material layer 24 on a negative electrode core 22. The negative electrode active material layer 24 has an opposed region 24a opposed to the positive electrode active material layer 14, and a non-opposed region 24b not opposed to the positive electrode active material layer 14. When a specific surface area of the opposed region 24a based on the BET method is defined as S1, and a specific surface area of the non-opposed region 24b based on the BET method is defined as S2, a relation of S2