| abstract |
A non-aqueous electrolyte secondary battery comprising a positive electrode plate, a negative electrode being provided with a negative electrode plate mixture layer containing a negative electrode active material, a separator; and a non-aqueous electrolyte. The negative electrode active material is a mixture of at least one of metal silicon and silicon oxide expressed by SiOx (0.5≦x<1.6) , and graphite material. And the graphite material includes coated graphite material coated with amorphous carbon in the ratio of equal to or more than 20% by mass, and equal to or less than 90% by mass to all the graphite material, and the ratio of the metal silicon and the silicon oxide to all the negative electrode active material is equal to or more than 1% by mass and equal to or more than 20% by mass. |