NOVELTY - A nonaqueous electrolyte secondary battery (10) comprises an electrode component (50), a nonaqueous electrolyte and a battery case (15) containing electrode component and nonaqueous electrolyte. The electrode component comprises a positive electrode (64) containing a positive electrode active material, and a negative electrode (84) containing a negative electrode active material. The nonaqueous electrolyte comprises a complex, a component of which is copper(I) chloride, which is capable of adsorbing carbon monoxide and carbon dioxide.    USE - Nonaqueous electrolyte secondary battery e.g. lithium-ion secondary battery is used as power supply. Uses include but are not limited to hybrid vehicle, electric vehicle, fuel motor vehicle, personal computer and portable terminal.    ADVANTAGE - The reliable nonaqueous electrolyte secondary battery has excellent capacity retention ratio and cycle characteristics, and reduced reaction resistance.    DETAILED DESCRIPTION - A nonaqueous electrolyte secondary battery comprises an electrode component, a nonaqueous electrolyte and a battery case containing electrode component and nonaqueous electrolyte. The electrode component comprises a positive electrode containing a positive electrode active material, and a negative electrode containing a negative electrode active material. The nonaqueous electrolyte comprises a complex, a component of which is copper(I) chloride, which is capable of adsorbing carbon monoxide and carbon dioxide. A coating containing phosphorus and/or boron is formed on the surface of the negative electrode active material. INDEPENDENT CLAIMS are included for the following:    (1) manufacture of nonaqueous electrolyte secondary battery; and    (2) nonaqueous electrolyte secondary battery assembly (70).    DESCRIPTION OF DRAWING(S) - The drawing shows schematic view of external shape of the nonaqueous electrolyte secondary battery.    Nonaqueous electrolyte secondary battery (10)    Battery case (15)    Electrode component (50)    Positive electrode (64)    Assembly (70)    Negative electrode (84)