Abstract
Magnesium aluminum eutectic alloy (Mg–34 % Al) was prepared as anode of magnesium–air battery with a view to decrease the corrosion rate of magnesium anode. Results indicate that as–cast eutectic alloy has a lower corrosion rate and a lower discharge activity in 3.5 % NaCl solution. The assembled battery with as–cast eutectic alloy as anode, a water soluble graphene poly (sodium 4–styrenesulfonate)/graphene based NaCl solution and a graphene/Mn3O4 nanometre composite as air cathode catalyst has a higher discharge activity. Lower corrosion rate of as–cast anode is due to corrosion products of black aluminum–rich oxide formed in fine lamella β–Mg17Al12 phase.
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