Composition optimization and electrochemical properties of Mg-Al-Sn-Mn alloy anode for Mg-air batteries

- Systematic study of the effect of alloy elements on the magnesium alloy anode's electrochemical properties.
- The effect of Al, Sn, Mn on the electrochemical performance of magnesium alloy anode ranks in the order of Al, Sn and Mn.
- Optimized Mg-6Al-1Sn-0.4Mn alloy shows the best electrochemical performance as magnesium anode.

The effect of Al, Sn and Mn on the electrochemical properties of extruded magnesium alloy anode was systematically investigated by orthogonal design. The optimal combination, Mg-6Al-1Sn-0.4Mn alloy anode, was obtained through comprehensive analysis. The combination was further verified by the characterization of microstructure, composition and electrochemical performance. The average discharge potential reaches − 1.602 V (vs. SCE), showing obvious discharge superiority against the trial samples. The research result is also of value to the development of low cost, non-toxic and well-performance magnesium alloy anode.

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