Volume 44, Issue 11 pp. 8865-8876
RESEARCH ARTICLE

The role of long-period stacking ordered phase on the discharge and electrochemical behaviors of magnesium anode Mg-Zn-Y for the primary Mg-air battery

Xingrui Chen

Xingrui Chen

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia, Queensland, Australia

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Henan Wang

Henan Wang

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

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Qichi Le

Corresponding Author

Qichi Le

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

Correspondence

Qichi Le, Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, 314 Mailbox, Shenyang 110819, People's Republic of China.

Email: [email protected]

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Yonghui Jia

Yonghui Jia

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

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Xiong Zhou

Xiong Zhou

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

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Fuxiao Yu

Fuxiao Yu

Key Lab of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University, Shenyang, China

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Andrej Atrens

Andrej Atrens

School of Mechanical and Mining Engineering, The University of Queensland, St. Lucia, Queensland, Australia

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First published: 09 June 2020
Citations: 33

Funding information: National Natural Science Foundation of China, Grant/Award Number: 51974082; Programme of Introducing Talents of Discipline Innovation to Universities 2.0 (the 111 Project of China 2.0) , Grant/Award Number: BP0719037; National Key Research and Development Program of China: 2016YFB0301104

Summary

This work investigated and discussed the role of long-period stacking ordered (LPSO) phase on discharge performance and electrochemical behaviors of Mg-Zn-Y anode for Mg-air battery in detail. The volume fraction of LPSO phase increases with the increasing Y and Zn content. Compared with Mg-2Zn anode, Mg-Zn-Y anode with low content of LPSO phase has better discharge properties due to high open-circuit potential and low corrosion rate. However, anodes contained a high volume of LPSO phase exhibit poor corrosion resistance and discharge properties. The ZW12 alloy shows the best discharge capacity and anodic efficiency as high as 1612.9 mAh·g−1 and 74.49% at the 40 mA·cm−2. It also outputs a high peak specific energy 1859.15 mWh·g−1 at 10 mA cm−2, which is 37.56% higher than Mg-2Zn anode and 249.44% higher than ZW39 anode. The LPSO phase totally changes the decomposition process of Mg matrix, displaying the lamellar peeling surface in LPSO-affect zone. This lamellar peeling mode can help to take away the discharge products from the anodic surface, improving the anode performance.

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