The invention discloses a
graphene-containing
lead alloy for lead storage battery grids. The
graphene-containing
lead alloy includes 0.015-0.15% of
graphene, 1.0-1.5% of
tin, 0.02-0.04% of aluminum, 0.05-0.1% of
calcium and 98.21-98.915% of lead. A preparation method of the graphene-containing
lead alloy comprises the following steps: putting 2 / 3 of lead in a lead melting pot, and heating to 680DEG C in order to melt lead; adding graphene to molten lead; adding pure
tin strips and pure aluminum strips 20min later, and stirring and mixing for above 0.5h; adding lead sheath packaged
calcium, pressing
calcium into the bottom of the molten lead by using a
bell jar with the bottom provided with leakage holes, slowly stirring and mixing for above 0.5h when the molten lead does not bubble, adding the residual lead into the lead melting pot, continuously stirring after the lead is completely molten, and carrying out
ingot casting 1h later. The preparation method has the advantages of simplicity, reliability, simple structure of a used device, and low cost; and the grids made by using the lead
alloy prepared through the method have strong
creep and
corrosion resistance, and can meet deep cycle and heavy current
charge and discharge requirements.