| 摘要 |
The present invention addresses the problem of providing a non-aqueous electrolyte secondary battery which can have high capacity and good cycle properties. The solution is a non-aqueous electrolyte secondary battery characterized in that a negative electrode active material for a negative electrode comprises nano-sized particles each of which contains element X and element M and has at least a first phase that comprises element Si or a solid solution of Si and a second phase that comprises a compound composed of Si and element M, and is also characterized in that an electrolytic solution contains an organic material that has an unsaturated bond in the molecule and can be reduction-polymerized, wherein the element X is at least one element selected from the group consisting of Si, Sn, Al, Pb, Sb, Bi, Ge, In and Zn and the element M is at least one element selected from the group consisting of transition metal elements belong to Groups 4-11. |
