期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 765, 期 -, 页码 736-746出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.05.070
关键词
Magnesium anode; Hot rolling; Texture evolution; Discharge properties
资金
- National Science Foundation of China [51101171]
- National Science Foundation of Hunan Province [2016JJ2147]
Mg-Hg-Ga alloys are typical anode materials used in high-power seawater-activated batteries. In this work, the effect of hot rolling on the microstructure and discharge properties of Mg-1.6 wt%Hg-2wt%Ga alloy was studied. The results indicate that hot rolling refines and deforms the grains, weakens the basal texture, and facilitates the dispersive precipitation of Mg5Ga2 and nano-scaled Mg21Ga5Hg3 phases. The precipitation of secondary phases during rolling reduces the solid solubility of Hg and Ga in the Mg matrix, thus deteriorating discharge activity and thickening the discharge product film in the Mg-Hg-Ga alloy. Nevertheless, the 0.35 mm-thick hot-rolled Mg-Hg-Ga alloy exhibits an excellent corrosion resistance and high specific discharge capacity (1903 mAh g(-1)) during discharge at the current density of 20 mA cm(-2). Therefore, the rolled Mg-Hg-Ga alloy is a promising anode material for application in low-power and long-term seawater batteries. (C) 2018 Elsevier B.V. All rights reserved.
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