| 摘要 |
[TECHNICAL PROBLEM] To Provide a negative electrode for an electrical device such as a Li ion secondary battery that has a high initial capacity and exhibits good balance characteristics while maintaining high cycle characteristics. [SOLUTION TO PROBLEM] A negative electrode for an electrical device includes: a current collector; and an electrode layer containing a negative electrode active material, an electrically-conductive auxiliary agent and a binder and formed on a surface of the current collector, wherein the negative electrode active material contains an alloy represented by a following formula (1): Si x Zn y M z A a (in the formula (1) M is at least one metal selected from the group consisting of V, Sn, Al, C and combinations thereof, A is inevitable impurity, and x, y, z and a represent mass percent values and satisfy 0 < x < 100, 0 < y < 100, 0 < z < 100, 0 ‰¤ a < 0.5 and x+y+z+a = 100), and elongation (´) of the electrode layer is 1.29 < ´ < 1.70%. |
