Patent ID: 7374842

Claim:
A non-aqueous electrolyte secondary battery, comprising: (a) a positive electrode plate comprising a positive electrode current collector and a positive electrode material mixture layer carried on each face of said positive electrode current collector; (b) a non-aqueous electrolyte; and (c) a negative electrode plate comprising a negative electrode current collector and a negative electrode material mixture layer carried on each face of said negative electrode current collector, wherein said positive electrode material mixture layer comprises a lithium-containing composite oxide, a total thickness of said positive electrode material mixture layers on both faces of said positive electrode current collector is not smaller than 40 μm and not larger than 100 μm, said positive electrode plate has an electrode area of not smaller than 520 cm 2 and not larger than 800 cm 2 per battery capacity of 1 Ah, said negative electrode material mixture layer comprises a graphitizable carbon material capable of absorbing and desorbing lithium, a wide-range X-ray diffraction pattern of said graphitizable carbon material, which is measured by means of CuKα rays, has a peak PX ( 101 ) attributed to a ( 101 ) crystal face at an angle of about 2θ=44 degrees, and a peak PX ( 100 ) attributed to a ( 100 ) crystal face at an angle of about 2θ=42 degrees, and a ratio of an intensity IX ( 101 ) of PX ( 101 ) to an intensity IX ( 100 ) of PX( 100 ) satisfies the formula (1): 0 <IX (101)/ IX (100)<1.