NOVELTY - A flat nonaqueous electrolyte secondary battery (10) has a positive electrode plate (16) provided with positive electrode mixture layer containing positive electrode active material, a negative electrode plate (17), a electrode component (13) having structure obtained by laminating plates (16 and 17) with a separator (18) interposed between plates (16 and 17), and a nonaqueous electrolyte solution. A metallic compound chosen from aluminum, magnesium, titanium, zirconium, tungsten and rare earth element is adhered to a surface of the positive electrode active material.    USE - Flat nonaqueous electrolyte secondary battery e.g. laminated -type nonaqueous electrolyte secondary battery is used for battery pack (claimed). Uses include but are not limited to mobile telephone, notebook personal computer, tablet personal computer, electric vehicle, hybrid electric vehicle, plug-in hybrid electric vehicle, and electric tool.    ADVANTAGE - The flat nonaqueous electrolyte secondary battery has excellent cycle characteristics even if charging voltage of positive electrode is increased.    DETAILED DESCRIPTION - A flat nonaqueous electrolyte secondary battery has a positive electrode plate provided with a positive electrode mixture layer containing a positive electrode active material which is capable of reversibly absorbing and desorbing lithium a negative electrode plate, an electrode component having a structure which is obtained by laminating the plates (16 and 17) with a separator interposed between plates (16 and 17), and a nonaqueous electrolyte solution. A metallic compound chosen from aluminum, magnesium, titanium, zirconium, tungsten and rare earth element is adhered to a surface of the positive electrode active material, and a pressure is applied to the flat nonaqueous electrolyte secondary battery from the outside in the lamination direction of plate (16, 17) and separator. An INDEPENDENT CLAIM is included for battery pack.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of flat nonaqueous electrolyte secondary battery. (Drawing includes non-English language text)    Flat nonaqueous electrolyte secondary battery (10)    Electrode component (13)    Positive electrode plate (16)    Negative electrode plate (17)    Separator (18)