Preparation of PbBaSnAl positive grid alloys and their electro-chemical corrosion properties in sulfuric acid

Lead-acid batteries (LABs) are commonly used in various energy-storage areas, but their lifetime is seriously limited by the corrosion of the positive grids in deep charge-discharge cycles. Among various factors, the composition of grid alloy is key to determining its corrosion behaviors. Herein, PbBaSnAl (PBSA) alloys with different contents of Ba are prepared by using an induction melter in an argon-filled glovebox. The results of electrochemical measurement show that the oxygen evolution potential of PBSA increases from 1.8586 V to 1.8815 V, and the corrosion rate decreases from 0.4949 mg.h(-1).cm(-2) to 0.2211 mg.h(-1).cm(-2). The results of mechanical tests show that after Ba is added, the strain of the alloy increases and the fracture of the alloy decreases during grid creep. This work provides a promising Ba-containing positive grid alloy instead of the commercial PbCaSnAl (PCSA) grid alloy, which may prolong the service life of LABs and improve the application of LABs in energy storage areas.