NOVELTY - A non-aqueous electrolyte secondary battery comprises positive electrode plate having substrate and mixture layer having positive electrode active material coated on substrate such that uncoated part is formed along substrate long side; negative electrode plate; and separator. The layer has lithium transition-metal compound/conductive material (5-15 mass%). The material has not less than 70 mass% of flaked graphite particles with average diameter of 5-30 mu m and average thickness of 0.1-1 mu m; or fibrous carbon with average diameter of 50-300 nm, or carbon black with average diameter of 20-100 nm.    USE - As non-aqueous electrolyte secondary battery (claimed) in electric vehicles and hybrid electric vehicles; and as lithium ion secondary battery in car industry and automobile industry.    ADVANTAGE - The battery has high output characteristics and high safety. By using a positive electrode mixture including a particular content of a carbon material with a particular physical property as a conductive material, little distortion is generated in a positive electrode plate at the time of compression, a rolling gap is hard to be generated when a rolled electrode is prepared, and an inner short circuit rarely occurs. The battery has reduced generation of distortion at the time of compression of the positive electrode mixture layer. The battery inhibits abnormal states such as inner short circuit and hence is suitable for obtaining electric vehicles and hybrid electric vehicles with excellent safety. In comparison with the case of a non-aqueous electrolyte secondary battery using a positive electrode active material with a high initial effect such as LiCoO2, LiMn2O4, the non-aqueous electrolyte secondary battery using the positive electrode active material composed of lithium transition-metal compounds has a nature that an output voltage of the battery comparatively moderately deteriorates because an internal resistance at an end stage of discharging becomes gradually high in a discharge curve, and thus the non-aqueous electrolyte secondary battery is suitable for electric vehicles and hybrid electric vehicles.    DETAILED DESCRIPTION - A non-aqueous electrolyte secondary battery comprises a positive electrode plate having an elongated positive electrode substrate and a positive electrode mixture layer containing a positive electrode active material coated on the positive electrode substrate such that an uncoated part is formed along at least one long side of the positive electrode substrate; a negative electrode plate having an elongated negative electrode substrate and a negative electrode mixture layer coated on the negative electrode substrate such that an uncoated part is formed along at least one long side of the negative electrode substrate; and a separator laminated between the positive electrode plate and the negative electrode plate. The positive electrode plate, the negative electrode plate and the separator forms a rolled electrode. The positive electrode mixture layer includes a lithium transition-metal compound capable of insertion and separation of lithium ion, and 5-15 mass% of a conductive material with respect to the positive electrode mixture. The conductive material contains not less than 70 mass% of flaked graphite particles with an average particle diameter (D50) of 5-30 mu m and an average thickness of 0.1-1.0 mu m with respect to the whole amount of the conductive material, and a packing density of the positive electrode mixture layer is 2-2.80 g/cc. An elongation percentage of the positive electrode substrate in a compression process is less than 0.07% at the time of forming the positive electrode mixture layer. The positive electrode substrate is aluminum foil or aluminum alloy foil with a tensile strength of greater than or equal to 150 N/mm2 and a thickness of 10-30 mu m. The conductive material includes at least one of fibrous carbon with an average fiber diameter of 50 to 300 nm or carbon black with an average particle diameter (D50) of 20-100 nm. A tap density of the positive electrode active material is greater than or equal to 2.3 g/cc. The positive electrode active material is lithium transition-metal compounds of formula Li1+aNixCOyMzO2 (where M is at least one element selected from Mn, Al, Ti, Zr, Nb, B, Mg and Mo, a is 0-0.3, x is 0.1-1, y is 0-0.5, z is 0-0.9 and a+x+y+z is 1).