Effects of second phases in anode materials on discharge performance of Mg-air batteries

Discharge Behavior and Mechanism of Solid-Solution-Treated Alloy Anodes for Magnesium–Air Batteries

“…However, the specific energy density deteriorates when the current density increases from 5 to 10 mA·cm –2 . Figure c compares the battery performance of Mg–air batteries at a current density of 10 mA·cm –2 in the present study and recently published investigations. ,,− ,,,,,,,− The anodic efficiencies of solid-solution-treated alloys in this work are very good. However, their operating voltages are in the middle of range.…”

Organic/inorganic double solutions for magnesium–air batteries

“…Song 15 indicated that the b-phase can serve as an anode barrier to inhibit the corrosion expansion of the amatrix. As a continuation of earlier research activities, 7,28 Mg-6 wt% Al alloy was selected as the anode material. Fig.…”

Discharge properties of Mg-Sn-Y alloys as anodes for Mg-air batteries

“…The self-corrosion decreases the anodic efficiency, and the blocking of the surface decreases the fresh anode surface area and causes the polarization of Mg anode. In response, novel Mg alloy anodes have been explored [33][34][35], such as the Mg-Al-Pb [24,26,[36][37], Mg-Al-Zn [28][29][30][38][39], Mg-Ca [33][34], and Mg-Li [40][41][42]. These Mg anodes still have problems [28,32,34], such as security (Mg-Li) [28,34], toxicity (Mg-Al-Pb) [28,34], and only presenting a low unsteady discharge voltage [23,32] (Mg-Al-Zn and Mg-Ca).…”

“…In response, novel Mg alloy anodes have been explored [33][34][35], such as the Mg-Al-Pb [24,26,[36][37], Mg-Al-Zn [28][29][30][38][39], Mg-Ca [33][34], and Mg-Li [40][41][42]. These Mg anodes still have problems [28,32,34], such as security (Mg-Li) [28,34], toxicity (Mg-Al-Pb) [28,34], and only presenting a low unsteady discharge voltage [23,32] (Mg-Al-Zn and Mg-Ca). That is to say, it is of great significance to develop novel safety Mg anodes with excellent discharge properties.…”

“…Furthermore, the relatively Volta potential differences between the second phases and Mg matrix of the Mg-Sn-Y alloys were also measured. Herein, the Mg-1.4Y binary alloy has a single-phase structure [54][55][56][57] because the solid solubility of Y in Mg is 12.47wt%, so that the Mg-1.4Y binary alloy with a single-phase structure was not considered for the design of anode material candidate for a Mg-air battery, because usually, the Mg-air battery based on a Mg alloy with a single-phase structure (such as pure Mg) has a poor discharge property [32,34,36,40]. The aim of this present work was to explore the possibility of Mg-Sn-Y alloys as the anode materials for Mg-air batteries, and to analyze the relationship between microstructure (including the second phase, grain size, and texture) and discharge properties of the Mg-Sn-Y alloys.…”