Effects of Co and Ti on the electrode properties of Mg3MnNi2 alloy by ball-milling process

► The formation of nanostructure improves the discharge capacity of the alloy. ► Co and Ti facilitate the amorphization of Mg3MnNi2-200 mol% M (M = Co, Ti) alloys. ► Co addition to Mg3MnNi2 alloy increases the maximum discharge capacity of alloy. ► The anti-corrosion ability of alloy is enhanced by Ti addition to Mg3MnNi2 alloy.