Discharge properties of Mg–Sn–Y alloys as anodes for Mg-air batteries

Hua-bao Yang; Liang Wu; Bin Jiang; Bin Lei; Ming Yuan; Hong-mei Xie; Andrej Atrens; Jiang-feng Song; Guang-sheng Huang; Fu-sheng Pan

doi:10.1007/s12613-021-2258-6

Volume 28 Issue 10

Oct. 2021

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2021 > 28(10): 1705-1715

Hua-bao Yang, Liang Wu, Bin Jiang, Bin Lei, Ming Yuan, Hong-mei Xie, Andrej Atrens, Jiang-feng Song, Guang-sheng Huang, and Fu-sheng Pan, Discharge properties of Mg–Sn–Y alloys as anodes for Mg-air batteries, Int. J. Miner. Metall. Mater., 28(2021), No. 10, pp. 1705-1715. https://doi.org/10.1007/s12613-021-2258-6

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Hua-bao Yang, Liang Wu, Bin Jiang, Bin Lei, Ming Yuan, Hong-mei Xie, Andrej Atrens, Jiang-feng Song, Guang-sheng Huang, and Fu-sheng Pan, Discharge properties of Mg–Sn–Y alloys as anodes for Mg-air batteries, Int. J. Miner. Metall. Mater., 28(2021), No. 10, pp. 1705-1715. https://doi.org/10.1007/s12613-021-2258-6

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Research Article

Discharge properties of Mg–Sn–Y alloys as anodes for Mg-air batteries

+ Author Affiliations

Corresponding authors:
Liang Wu E-mail: wuliang@cqu.edu.cn

Bin Jiang E-mail: jiangbinrong@cqu.edu.cn
Received: 28 July 2020; Revised: 21 January 2021; Accepted: 22 January 2021; Available online: 26 January 2021

Abstract

Abstract

Mg–Sn–Y alloys with different Sn contents (wt%) were assessed as anode candidates for Mg-air batteries. The relationship between microstructure (including the second phase, grain size, and texture) and discharge properties of the Mg–Sn–Y alloys was examined using microstructure observation, electrochemical measurements, and galvanostatic discharge tests. The Mg–0.7Sn–1.4Y alloy had a high steady discharge voltage of 1.5225 V and a high anodic efficiency of 46.6% at 2.5 mA·cm⁻². These good properties were related to its microstructure: small grain size of 3.8 μm, uniform distribution of small second phase particles of 0.6 μm, and a high content (vol%) of (
\begin{document}$ 11\overline{2}0 $\end{document}
)/(
$ 10\overline{1}0 $
) orientated grains. The scanning Kelvin probe force microscopy (SKPFM) indicated that the Sn₃Y₅ and MgSnY phases were effective cathodes causing micro-galvanic corrosion which promoted the dissolution of Mg matrix during the discharge process.
- magnesium–stannum–yttrium alloy;
- microstructure;
- micro-galvanic corrosion;
- discharge properties;
- magnesium-air battery

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