FIELD: electricity.
SUBSTANCE: active material for negative electrode of electric device includes allow containing Si within the content range more than 27 wt % and less than 100 wt %, Sn within the content range more than 0 wt % and less or equal to 73 wt %, V within the content range more than 0 wt % and less or equal to 73 wt % and inevitable impurities as residue. The active material for negative electrode may be obtained by magnetron sputtering unit for multiple targets at direct current using Si, Sn and V as the targets.
EFFECT: electrical device using active material for negative electrode may reach long-term cyclic life and provide high resistance and operating durability in cyclic mode.
8 cl, 5 dwg
