Performance of Al−0.5 Mg−0.02 Ga−0.1 Sn−0.5 Mn as Anode for Al-Air Battery

In this research, Al-air battery based on Al−0.5 Mg−0.02 Ga−0.1 Sn−0.5 Mn anode with industrial 2N8 aluminum was prepared, the corrosion behavior and the battery performance were investigated in 2 molL −1 NaCl, 4 molL −1 NaOH, 4 molL −1 NaOH + 0.2 molL −1 ZnO, 7 molL −1 KOH and 7 molL −1 KOH + 0.2 molL −1 ZnO solutions. The results show that compared with in alkaline solutions, the alloy has higher electrochemical performance and lower self-corrosion rate in 2 molL −1 NaCl, the corrosion potential and the self-corrosion rate of the alloy in 2 molL −1 NaCl are −1.401 V (vs Hg/HgO) and 0.0008 cm·year −1 , respectively. At a current density of 20 mAcm −2 , the operate voltage of Al-air battery is 1.116 V, and the anodic utilization rate is 83.7% in 2 molL −1 NaCl. The morphology after discharge is passivity attributed to the surface hydroxide layer on the alloy in 2 molL −1 NaCl. The high anodic utilization during discharge in 2 molL −1 NaCl is partially responsible for the higher R t , which is well validated by EIS measurement.