NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

This non-aqueous electrolyte secondary battery is characterized by having a positive electrode, a negative electrode, and a non-aqueous electrolyte, wherein the positive electrode has a positive electrode current collector and a positive electrode mixture layer provided on the positive electrode current collector, the positive electrode mixture layer includes a positive electrode active material and a dielectric, and the ratio (D50 of the dielectric/D50 of the positive electrode active material) of a volume-based median diameter (D50) of the dielectric to a volume-based median diameter (D50) of the positive electrode active material is 0.15-0.6.