Details

Autor(en) / Beteiligte

• Zhao, Jun
• Yu, Kun
• Hu, Yanan
• Li, Shaojun
• Tan, Xin
• Chen, Fuwen
• Yu, Zhiming

Titel

Discharge behavior of Mg–4 wt%Ga–2 wt%Hg alloy as anode for seawater activated battery

Ist Teil von

• Electrochimica acta, 2011-10, Vol.56 (24), p.8224-8231

Ort / Verlag

Kidlington: Elsevier Ltd

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• ► Produced the Mg–Ga–Hg alloy anode and researched its microstructures in different conditions. ► Researched the electrochemical discharged behavior of Mg–Ga–Hg alloy in different conditions. ► Compared the electrochemical properties of Mg–Ga–Hg alloy with AZ31 and AP65 alloys. ► Assembled the prototype battery with Mg–Ga–Hg anode and studied its electrochemical properties. Magnesium–gallium–mercury alloy is one of the new developed anode materials for seawater activated batteries. The potentiodynamic polarization, galvanostatic discharge and electrochemical impedance spectroscopy of Mg–4%Ga–2%Hg alloy in seawater are studied and compared with commercial AZ31 and AP65 alloys in this study. The results show that Mg–4%Ga–2%Hg alloy exhibits different discharge behaviors in as-cast, homogenizing, rolling and annealing conditions. The annealing Mg–4%Ga–2%Hg sheet obtains the most negative corrosion potentials in different current densities. And the Mg–4%Ga–2%Hg alloy provides more negative corrosion potentials than AZ31 and AP65 alloys. EIS studies reveal that the Mg–Ga–Hg alloy/seawater interfacial process is determined by an activation-controlled reaction. The Mg 3Hg and Mg 21Ga 5Hg 3 phases improve the electrochemical properties of Mg–4%Ga–2%Hg alloy. The assembled prototype battery with Mg–4%Ga–2%Hg alloy as anode and CuCl as cathodes exhibits a satisfactory discharge performance because of the advantages in discharge characterizations and microstructure of the Mg–4%Ga–2%Hg alloy.