Nonaqueous electrolyte secondary battery

A nonaqueous electrolyte secondary battery comprising a positive electrode plate including a positive electrode current collector and a positive electrode mixture layer, formed thereon, containing a positive electrode active material;

• a negative electrode plate including a negative electrode current collector and a negative electrode mixture layer, formed thereon, containing a negative electrode active material;
• a separator;
• a nonaqueous electrolyte;
• an outer can;
• and a sealing body,
• wherein the positive electrode plate and the negative electrode plate are wound with the separator therebetween;
• the positive electrode active material contains a lithium-nickel composite oxide;
• the lithium-nickel composite oxide is represented by the formula LiaNibCocAldO2 (0<a≦1.2, 0.8≦b<1, 0<c<0.2, 0<d<0.05, and b+c+d=1);
• the negative electrode active material contains graphite and a silicon material;
• the negative electrode plate includes negative electrode current collector-exposed portions, located at both ends thereof in a longitudinal direction, not covered by the negative electrode mixture layer;
• and
• the negative electrode current collector-exposed portions are each connected to a negative electrode tab.