Effect of Al and Sn on Discharge Behavior of Mg Alloy as Anode for Mg-Air Battery

In this study, we researched the effect of Al and Sn on discharge behavior of Mg alloy as anode for Mg-air battery. The as-cast and rolled AT alloys mainly consisted of α-Mg matrix and Al–Mn phases, Mg2Sn phase. With increase of Al and Sn contents, the discharge property of AT alloy was improved. In case of AT63 alloy, it can be seen that many fine cracks formed on discharge products promote electrochemical reaction from NaCl electrolyte to Mg anode surfaces, and finely dispersed pits formed by micro-galvanic corrosion between α-Mg matrix and Mg–Sn phases promote continuously reaction during discharge test.