| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery which has high energy density, is excellent in cycle characteristic and is reduced in side reaction generated when the battery is preserved and used. SOLUTION: In a nonaqueous electrolyte secondary battery provided with a positive electrode, a negative electrode and lithium ion conductive nonaqueous electrolyte, at left of either one of the positive electrode or the negative electrode contains a carbonaceous material together with an electrode active material, and natural scale shaped graphite or expanded graphite which is 5 to 50 m<2> g in specific surface area (BET method), a range of 1 to 50 μm in the average grain diameter, 0.333 to 0.340 nm in spacing (d) (002) in X-ray diffraction, and 40 to 500 nm in a c-axis direction (Lc) in the size of crystal lattice and 40 to 500 nm in an a-axis direction (La) is used as the carbonaceous material. |
