| abstract |
The present invention provides a nonaqueous secondary battery having a high capacity and excellent safety and charge / discharge cycle characteristics, wherein the negative electrode contains a material containing Si as a constituent element and a graphite carbon material as a negative electrode active material. And a lithium-containing composite oxide containing the sulfur in the range of 0.01% by mass or more and 0.5% by mass or less as a general composition formula (1) below. Li 1 + y MO 2 (1) y represents -0.3 ≦ y <0.3, and M represents at least five element groups containing at least one of Ni, Co, Mn, and Mg, and Al, Ba, Sr, Ti, and Zr, and constitutes M. When Ni, Co, Mn, and Mg with respect to the whole element to be a, b, c and d are each in mol%, and the total ratio of Al, Ba, Sr, Ti and Zr is e in mol%, 70 ≦ a ≦ 97, 0.5 <b <30, 0.5 <c <30, 0.5 <d <30, −10 <cd <10, −8 ≦ (cd) / d ≦ 8 and e <10. |