Performance of Al-1Mg-1Zn-0.1Bi-0.02In as anode for the Al-AgO battery

In this study, an Al-AgO battery based on Al and Al-1Mg-1Zn-0.1Bi-0.02In (wt%) was prepared and the battery performance was investigated by a constant current discharge test in 4 M NaOH and 7 M KOH solutions. The characterizations of the aluminum anodes after discharge were investigated by electrochemical impedance spectroscopy (EIS). The corrosion behavior of the anodes were studied using measurements of self-corrosion, potentiodynamic polarization and EIS experiment accompanied with open circuit potential techniques and scanning electron microscopy (SEM). The results show that Al-1Mg-1Zn-0.1Bi-0.02In is more active than the Al anode, and compared with Al, the alloy has the lower self-corrosion rate in both applied electrolyte solutions. It has been observed that the Al-AgO battery based on Al-1Mg-1Zn-0.1Bi-0.02In offers higher operating voltage and anodic utilization than those with pure Al. At a current density of 50 mA cm(-2), the operation voltage of the Al-AgO battery is 2.04 V and the anodic utilization rate is 69.95% in 7 M KOH solution.