Magnesium-rare earth intermetallic compounds for high performance high power aqueous Magnesium-Air batteries

被引：2

作者：

Ma B. ^{[1
]}

Ouyang L. ^{[1
]}

Zheng J. ^{[2
]}

机构：

[1] School of Materials Science and Engineering, Guangdong Engineering Technology Research Center of Advanced Energy Storage Materials, South China University of Technology, Guangzhou

[2] Beijing National Laboratory for Molecular Science (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing

来源：

Journal of Magnesium and Alloys | / 12卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Anodic efficiency; Discharge activity; Intermetallic compounds; Mg-air batteries; Rare earth;

D O I：

10.1016/j.jma.2023.06.010

中图分类号：

学科分类号：

摘要：

Magnesium alloys are light structural materials and promising anode candidates for Mg-air batteries. However, application of Mg-air batteries is limited by poor performance at large current density and severe H2 generation side reactions. In this study, we pioneered magnesium-rare earth Mg3RE (RE=La, Ce, Pr and Nd) intermetallic compounds as anodes to provide higher power density and more stable discharge performance. Especially, Mg3Pr alloy exhibits high discharge voltage of 0.91 V and peak power density of 54.4 mW cm−2 at 60 mA cm−2 with anodic efficiency of 60%, far better than other Mg alloys. We reveal an activation mechanism of Mg3RE-based anodes during discharge, which significantly accelerates mass transfer process as well as enhances discharge activity. The results improve the performance of high-power Mg-air batteries and promote the value-added application of abundant rare earth elements such as Ce and La. © 2023

引用

页码：4191 / 4204