文献类型：期刊文献

英文题名：Discharge performance of Mg-Y binary alloys as anodes for Mg-air batteries

作者：Zhang, Yuwenxi[1];Fan, Lingling[1];Guo, Yangyang[2];Zhou, Mingyang[3];Ren, Lingbao[4];Yang, Huabao[5];Quan, Gaofeng[1]

机构：[1]Southwest Jiaotong Univ, Sch Mat Sci & Engn, Key Lab Adv Technol Mat, Minist Educ, Chengdu 610031, Peoples R China;[2]XIAN Rare Met Mat Inst Co Ltd, Xian 710049, Peoples R China;[3]Nucl Power Inst China, Sci & Technol Reactor Syst Design Technol Lab, Chengdu 610213, Peoples R China;[4]Xi An Jiao Tong Univ, Ctr Adv Mat Performance Nanoscale, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China;[5]Shaoxing Univ, Sch Mech & Elect Engn, Shaoxing 312000, Peoples R China

年份：2023

卷号：460

外文期刊名：ELECTROCHIMICA ACTA

收录：SCI-EXPANDED(收录号：WOS:001011406000001)、、EI(收录号：20232114146376)、Scopus(收录号：2-s2.0-85159850581)、WOS

基金：This work was supported by the China Scholarship Council (No. 202207000080) , the National Natural Science Foundation of China (No: 52061040) , and China Postdoctoral Science Foundation (No: 2021M692512) .

语种：英文

外文关键词：Mg-air battery; Mg-Y anodes; Discharge performance; Electrochemical behaviors

外文摘要：In this work, the electrochemical properties and discharge performance of Mg-xY (x = 0, 0.5, 1, 2, 3, and 5 wt.%) binary alloys have been systematically investigated as anodes for Mg-air batteries, using electrochemical techniques and Mg-air battery tests. The results reveal that the Mg24Y5 and Y-rich phases in Mg-Y alloys play the micro-cathode and micro-anode roles, respectively. By adding a small amount of Y (0.5 and 1 wt.%), the electrochemical activity of the anode can be effectively enhanced, and hydrogen evolution during discharge can be inhibited. Among the investigated anodes, the Mg-1Y anode possesses the highest discharge voltage at all current densities. The Mg-0.5Y anode exhibits excellent comprehensive discharge performance, with the highest anodic efficiency, specific capacity, and energy density of 63%, 1376 mAh center dot g(-1), 1899 mWh center dot g(-1) at 10 mA center dot cm(-2), respectively. The discharge voltage and anodic efficiency decrease as the Y content increase further, attributed to the excessive second phases accelerating the self-corrosion and causing the "chunk effect".