Performance of Al-1Mg-1Zn-0.1Ga-0.1Sn as anode for Al-air battery

In this research, Al air battery based on Al-1Mg-0.1 Ga-0.1 Sn and Al-1Mg-1Zn-0.1Ga-0.1Sn (wt.%) anodes were prepared, the corrosion behavior and the battery performance were investigated in 2 M NaCI, 4 MNaOH and 7 M KOH solutions. The results show that the optimal electrochemical properties are obtained in Al-1Mg-1Zn-0.1Ga-0.1Sn alloy, and compared with in alkaline solutions the alloy has the lower self-corrosion rate in 2 M NaCl. The high anodic utilization during discharge in 2 M NaC1 is partially responsible for the higher Rt, which is well validated by EIS. Al-air battery based on the alloy has higher cell potential in 4 M NaOH. Contrast that with the electrochemical performance of Zn in alkaline solutions, it is feasibility of using the alloy as anode material for Al-air battery in 2 M NaCI and 4 M NaOH solutions. (C) 2014 Elsevier Ltd. All rights reserved.