Negative electrode for electric device and electric device using the same

A negative electrode for an electric device, comprising:

• 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 is a mixture of a carbon material and an alloy represented by the following formula (1):
• SixZnyMzAa (1)
• in formula (1), M is Sn,
• A is inevitable impurity, and
• x, y, z and a represent mass percent values and satisfy 23<x<64, 0<y<65, 4≦z<34, and 0≦a<0.5, and x+y+z+a=100.

A negative electrode for an electric device, comprising:

• 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 is a mixture of a carbon material and an alloy represented by the following formula (1):
• SixZnyMzAa (1)
• in formula (1), M is Sn,
• A is inevitable impurity, and
• x, y, z and a represent mass percent values and satisfy 23<x<44, 0<y<65, 34≦z≦58, and 0≦a<0.5, and x+y+z+a=100.