摘要
制备了三种Mg-0.5Zn-xY(x=0.1,0.3,0.5)合金,通过光学显微镜和X射线衍射仪分析了合金的微观组织,通过极化曲线、电化学阻抗谱和恒电流放电曲线分析了合金的电化学性能和其作为镁空气电池负极材料的性能。结果表明,三种合金均为单相结构,且随着Y含量的增加,合金的晶粒逐渐细化,腐蚀电位逐渐负移,腐蚀电流密度逐渐减小,电荷传递阻抗值R_t和膜阻抗值R_f之和逐渐增大,说明添加微量Y在不引入第二相的前提下细化了晶粒,提高了合金的电化学活性和耐腐蚀性能。此外,Y的添加还同时提升了镁空气电池的放电电压与阳极效率,改善了镁空气电池Mg-0.5Zn合金负极材料的性能。
After three kinds of Mg-0.5Zn-x Y(x=0.1,0.3 and 0.5)alloys had been pre-pared,the microstructure of the alloys was analyzed by optical microscope and X-ray diffrac-tometer,and the electrochemical properties of the alloys and their performance as negative e-lectrode materials for magnesium air batteries were analyzed through polarization curves,electrochemical impedance spectroscopy and constant current discharge curves.The results show that all the three alloys have single-phase structures,and with the increase of Y con-tent,the grain size is gradually refined,the corrosion potential gradually shifts negatively,the corrosion current densities gradually decrease,and the sum of charge transfer impedance R,and film impedance R gradually increase.It indicates that the addition of trace Y refines the grain structure without introducing the second phase,and improves the electrochemical activity and corrosion resistance.It also increases the discharge voltage and the anode effi-ciency of the magnesium air batteries,and improves Mg-0.5Zn alloy performance as negative electrode materials for magnesium air batteries.
作者
崔言明
赵炎春
张诚
CUI Yanming;ZHAO Yanchun;ZHANG Cheng(Zhejiang Funlithium New Energy Technology Co.,Ltd.,Ningbo 315100,China;School of Metallurgy and Materials Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《轻合金加工技术》
CAS
2024年第7期49-56,共8页
Light Alloy Fabrication Technology
