Effect of Lithium on the Discharge and Corrosion Behavior of Mg-3 wt.% Al Alloy as the Anode for Seawater Activated Battery

Journal Article · Sat Dec 15 04:00:00 EST 2018 · Journal of Materials Engineering and Performance

DOI:https://doi.org/10.1007/S11665-018-3750-7· OSTI ID:22971067

Wang, Ri-chu; Li, Qi ^[1]; Wang, Nai-guang ^[2]; Peng, Chao-qun; Feng, Yan ^[1]

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1. Central South University, School of Materials Science and Engineering (China)
2. Guangdong University of Technology, School of Materials and Energy (China)

The discharge and corrosion behavior of Mg-3 wt.% Al alloys added with different contents of lithium in 3.5 wt.% NaCl aqueous solution is studied by electrochemical methods and microstructure characterization. The results indicate that adding 4 wt.% lithium severely promotes the self-corrosion and the addition of 12 wt.% lithium is not valuable to the spalling of discharge products. In contrast, doping Mg-3 wt.% Al with 8 wt.% lithium negatively shifts the discharge potentials and inhibits the self-discharge, attributed to the dual-phase structure of α-Mg plus β-Li that removes the discharge products and favors the uniform dissolution in the course of discharge. Moreover, the multi-pass rolling with 40% reduction could tailor the microstructure of Mg-3 wt.% Al-8 wt.% Li alloy and further enhance its discharge activity, even though the corrosion resistance is slightly reduced. This means that the rolled Mg-3 wt.% Al-8 wt.% Li sheet is suitable to serve as the anode for seawater activated battery.

• OSTI ID: 22971067
• Journal Information: Journal of Materials Engineering and Performance, Journal Name: Journal of Materials Engineering and Performance Journal Issue: 12 Vol. 27; ISSN 1059-9495; ISSN JMEPEG
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ALLOYS
ANODES
AQUEOUS SOLUTIONS
CORROSION RESISTANCE
DOPED MATERIALS
ELECTROCHEMISTRY
LITHIUM
SEAWATER
SODIUM CHLORIDES