Corrosion and Air Batteries Discharge Behavior of Mg-Al-Zn and Mg-Li-Al-Zn Alloys

摘要

The Mg-Al-Zn and Mg -Li-Al-Zn alloys were used as the anode materials for magnesium-air batteries. The effects of texture, second phase, grain size, twins, and discharge products on the discharge performance of Mg -Al-Zn and Mg -Li-Al-Zn alloys were investigated by controlling the microstructure of the above alloys. The results s howed that the prismatic oriented (10-10) and (11-20) grains had higher discharge activities than that of the basal oriented (0002) grains. Because both grain boundaries and twin s were preferentially dissolved, grain refinement and the introduction of twin s was helpful to improve the discharge performance of Mg-Li-Al-Zn alloys with low Li content. The suitable microstructure characteristics of Mg alloys for the anodes of magnesium -air batteries were summarized as follows: fine grain size, a high content of (11-20)/(10-10) orientated grains, introduction of twins and uniform distribution of fine second phases.