NOVELTY - A nonaqueous electrolytic solution secondary battery comprises electrode body having positive and negative electrodes, where upper limit operating potential of positive electrode is greater than or equal to 4.5 V based on metallic lithium and includes current collector (32) and active material layer formed on collector. The current collector includes base material (32a) and surface layer (32b1, 32b2). The surface layer is formed of aluminum material having aluminum content of greater than or equal to 99.85 mass% and base material is formed of conductive material having strength larger than that of surface layer.    USE - As nonaqueous electrolytic solution secondary battery in vehicle (claimed) and as on-vehicle power source that uses electricity as a driving source or as a power source that is mounted on personal computers, portable terminals and other electric products; as on-vehicle high output power source for electric vehicles and hybrid vehicles; and as a driving power source of vehicles such as hybrid vehicles (HV), plug-in hybrid vehicles (PHV), electric vehicles (EV).    ADVANTAGE - The battery is lightweight and exhibits improved performance such as high energy density. The increased content of Al on surface of a current collector forms an excellent coat that prevents battery capacity from decreasing due to high potential charge/discharge formed on a surface of the current collector. The secondary battery can perform high potential charge/discharge of greater than or equal to 4.5 V. In the secondary battery that can perform the high potential charge/discharge, an increase in the battery resistance is suppressed and a decrease in the battery capacity is suppressed.    DETAILED DESCRIPTION - A nonaqueous electrolytic solution secondary battery comprises an electrode body that contains a positive electrode and a negative electrode, where an upper limit operating potential of the positive electrode is greater than or equal to 4.5 V based on metallic lithium, where the positive electrode includes a current collector (32) and an active material layer formed on the current collector, and the current collector includes a base material (32a) and a surface layer (32b1, 32b2) disposed on a surface of the base material. The surface layer is disposed at least in a region where the active material layer is not formed on the surface of the base material. The surface layer is formed of an aluminum material having an aluminum content of greater than or equal to 99.85 mass%, and the base material is formed of a conductive material having strength larger than strength of the surface layer. INDEPENDENT CLAIMS are included for the following:    (1) a vehicle comprising the nonaqueous electrolytic solution secondary battery; and    (2) a current collector that is used in a positive electrode of which upper limit operating potential is greater than or equal to 4.5 V based on metallic lithium, comprising: a base material; and a surface layer disposed on a surface of the base material, where the surface layer is formed of an aluminum material of which aluminum content is greater than or equal to 99.85 mass%, and the base material is formed of a conductive material of which strength is larger than strength of the surface layer.    DESCRIPTION OF DRAWING(S) - The figure shows cross-sectional view that schematically shows a current collector.    Current collector (32)    Base material (32a)    Surface layers (32b1, 32b2)