镁空气电池阳极用Mg-Sr合金的放电性能研究  

Study on the discharge performance of Mg-Sr alloy formagnesium-air battery anode

作　　者：原宇坤 栗东虎 侯利锋[1,2] 杜华云 王骞[1,2] 卫英慧 YUAN Yukun;LI Donghu;HOU Lifeng;DU Huayun;WANG Qian;WEI Yinghui(College of Materials Science&Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Corrosion and Protection Engineering Technology Research Center of Shanxi Province,Taiyuan 030024,China)

机构地区：[1]太原理工大学材料科学与工程学院,太原030024 [2]山西省金属材料腐蚀与防护工程技术中心,太原030024

出　　处：《功能材料》2024年第9期9111-9117,9126,共8页Journal of Functional Materials

基　　金：国家自然科学基金项目(52071227);吕梁市引进高层次科技人才重点研发项目(Rc2020-109)。

摘　　要：采用电化学技术和镁空气电池放电测试系统地研究了Mg-x Sr(x=0.2%,0.5%,1%,2%和4%)(质量分数)5种合金作为镁空气电池阳极材料的耐蚀性及放电性能。结果表明,在镁合金中添加适量的Sr元素时,可以有效的增强合金的耐蚀性和电化学活性。在所研究的阳极里,Mg-2Sr阳极在所有电流密度下都具有最高且相对稳定的放电电压且表现出最好的放电性能,在40 mA/cm 2下具有最高的阳极效率,为68%。随着Sr含量的进一步增加,过量的第二相加速了自腐蚀,合金的耐蚀性和放电性能下降。In this study,the corrosion resistance and discharge properties of five alloys of Mg-x Sr(x=0.2wt%,0.5wt%,1wt%,2wt%and 4wt%)as anode materials for magnesium-air batteries were systematically studied by electrochemical techniques and magnesium-air battery discharge test.The results show that the corrosion resistance and electrochemical activity of the alloy can be effectively enhanced when an appropriate amount of Sr is added to the magnesium alloy.Among the anodes studied,the Mg-2Sr anode had the highest and relatively stable discharge voltage and the best discharge performance at all current densities,and had the highest anode efficiency of 68%at 40 mA/cm.With the further increase of Sr content,the excess second phase accelerates self-corrosion,and the corrosion resistance and discharge performance of the alloy decrease.

关 键 词：镁合金 镁空气电池 微观组织 电化学性能 放电性能 

分 类 号：TG174.2[金属学及工艺—金属表面处理]