Abstract
In this study, the discharge behaviors of extruded low-alloyed Mg–Bi–Ca alloys in an aqueous electrolyte (3.5 wt% NaCl solution) were investigated using electrochemical techniques. The Mg–1Bi-0.5Ca alloy showed more negative discharge potential and higher anodic efficiency compared with the Mg–1Bi alloy during half-cell testing. Furthermore, the discharge morphologies of the Mg–1Bi-0.5Ca alloy showed loose and thin discharge products, along with numerous cracks, these features promoted diffusion of the NaCl solution into the discharge products, enhancing the discharge activity. The Mg–air battery with a Mg–1Bi-0.5Ca anode showed the higher cell voltage and power density at all current densities. Hence, the Mg–1Bi-0.5Ca alloy has great potential for further development as an anode material for Mg–air battery.
Published Version
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