| 摘要 |
A negative electrode active material for an electric device includes an alloy containing silicon in a range from 33% by mass to 50% by mass, zinc in a range of greater than 0% by mass and less than or equal to 46% by mass exclusive, vanadium in a range from 21% by mass to 67% by mass, and inevitable impurities as a residue. The negative electrode active material can be obtained with a multi DC magnetron sputtering apparatus by use of, for example, silicon, zinc, and vanadium as targets. An electric device using the negative electrode active material can achieve long cycle life and ensure a high capacity and cycle durability. |
