| abstract |
The present invention provides a non-aqueous electrolyte secondary battery, which has a negative electrode and a positive electrode, the negative electrode contains amorphous carbon-coated graphite with a charge-discharge efficiency of 93.5% or more as a negative electrode active material, and the positive electrode contains a positive electrode active material. The positive electrode active material includes a mixture in which the mass ratio (LMO:LNO) of lithium manganese-based oxide (LMO) to lithium nickel-based oxide (LNO) is in the range of 20:80 to 90:10. |