A negative electrode active material for an electric device includes an alloy containing silicon in a range from 25% to 54% exclusive, carbon in a range from 1% to 47% exclusive, zinc in a range from 13% to 69% exclusive in terms of mass ratio, and inevita...

Provided is a magnesium-silicon composite material which contains Mg 2 Si as an intermetallic compound imposing no burden on the environment, is suitable for use as a material for thermoelectric conversion modules, and has excellent thermoelectric conversi...