稀土镧和钛取代镁基储氢合金电极电化学性能的研究  

Effect of Ti-La substitution on electrochemical properties of amorphous MgNi-based secondary hydride electrodes

作　　者：刘景旺[1] 

机构地区：[1]天津师范大学化学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2011年第3期67-70,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：甘肃省科技支撑计划基金资助项目(0708GKCA034)

摘　　要：利用机械合金化方法制成了MgNi,Mg0.7Ti0.3Ni和Mg0.7Ti0.225La0.075Ni非晶态镁基合金,XRD表明球磨100 h后已形成非晶;电化学容量测试表明:在此实验条件下添加Ti,La元素改善了电极的循环稳定性能.其中,La的取代提高了合金的抗腐蚀性能和合金的电化学氧化还原反应的可逆性能,进而提高了电极的充放电循环稳定性.The amorphous MgNi,Mg0.7Ti0.3Ni and Mg0.7Ti0.225La0.075Ni alloys were prepared by mechanical alloying（MA）.The amorphous states of the alloys by ball milling for 100 h were characterized by X-ray diffraction（XRD）.Study on anti-corrosion properties in alkaline solution of the alloy electrode shows that Ti and La substitution of Mg improved the anti-corrosion properties and reversibility of electrochemical REDOX reaction significantly,and stability of charge-discharge cycle of the electrodes was improved.

关 键 词：镧 储氢合金 机械合金化 电极 

分 类 号：TQ153[化学工程—电化学工业]