Influence of Ga/Hg Ratio on Phase Constituents and Electrochemical Performance of Mg-Hg-Ga Anode Materials

2017 2nd International Conference on Advanced Materials Research and Manufacturing Technologies

材料科学;机械制造

Wang, Libo^1,2 ; Li, Peijie^2 ; He, Liangju^3

China Special Equipment Inspection and Research Institute, Beijing

100029, China^1

Department of Mechanical Engineering, Tsinghua University, Beijing

100084, China^2

School of Aerospace, Tsinghua University, Beijing

100084, China^3

关键词: Anode material;    Discharge process;    Discharge time;    Electrochemical performance;    Galvanostatics;    Phase constituent;    Potentiodynamic polarization curves;    Seawater batteries;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/229/1/012008/pdf
DOI  :  10.1088/1757-899X/229/1/012008

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This study investigated the impacts of Mg-Hg-Ga alloys of various Ga/Hg ratios on phase constituents and electrochemical performance. The relationship between composition and phase constituents of the casting alloys were investigated by SEM and XRD Potentiodynamic polarization curves and the galvanostatic curves of the alloys in 3.5wt% NaCl solution were obtained. With a Ga/Hg ratio greater than 0.97, the second phase changes from Mg3Hg to Mg5Ga2, and the normal eutectic becomes a divorced eutectic. Additionally, corrosion is inhibited and passivation appears with an increase in the Ga/Hg ratio increase. With a starting Ga/Hg ratio of less than 0.68, the discharge process becomes steadier and discharge time simultaneiously increases with the Ga/Hg ratio. Mg-Hg-Ga alloys with a 0.68 Ga/Hg ratio are suitable as the anode material for seawater batteries.