Enhancing primary aqueous magnesium-air battery performance by tailoring anode texture

Abstract

The mechanisms of the texture generated during the rolling process on the anodes of magnesium-air batteries remain unclear. This work systematically investigates the impact of texture on the dissolution and discharge processes of magnesium anodes using theoretical calculations combined with experiments. Results demonstrate that the ND (Normal Direction) plane of the rolled sheet contained a higher proportion of (0001) oriented grains, exhibiting excellent stability, the slowest anodic dissolution rate, superior corrosion resistance, and enhanced discharge performance. At a current density of 40 mA·cm−2, the discharge capacity and anode efficiency of the ND plane reached impressive values of 1369.86 mAh·g−1 and 61.57%. Additionally, hydrogen evolution, chunk effect, and loss of discharge during the discharge process of AZ31 anodes were quantified for the first time. Furthermore, the effect of texture on the cracking of the discharge product layer was investigated.