Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 721, Issue -, Pages 392-404Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.05.267
Keywords
Mg-Al-Pb alloy; Lanthanum; TEM; Grain orientation; Corrosion behavior; Discharge performance
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Funding
- National Science Foundation of China [51401243]
- Natural Science Foundation of Hunan Province [2016JJ2147]
- Science and Technology Plan projects of Hunan Province [2015JC3004]
- China Postdoctoral Science Foundation [2015T80883, 2014 M552151]
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Mg-Al-Pb alloys are a typical anode material for seawater-activated batteries. The microstructure and electrochemical corrosion behavior of a Mg-Al-Pb alloy fabricated by extrusion, with and without lanthanum, were investigated in this study. The results indicated that the addition of lanthanum led to the formation of beta-Al11La3 and promoted recrystallization. The extruded Mg-Al-Pb-La exhibited less dislocations and twin defects than the extruded Mg-Al-Pb, contributing to its improved corrosion resistance. A single battery with a Mg-Al-Pb-La anode and CuCI cathode exhibited a higher cell voltage than that using a Mg-Al-Pb anode. The power density of the former was 260.8 mW cm(-2) discharged at 300 mA cm(-2), which were higher values than those of Mg-H2O2 semi -fuel batteries. (C) 2017 Elsevier B.V. All rights reserved.
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