Mg_(1-x)Ti_xNi(0≤x≤0.4)系列合金的合成及性能研究  

Studies on Preparation and Properties of Mg_(1-x)Ti_x Ni (0≤x≤0.4) Alloys

作　　者：袁华堂[1] 宋赫男[1] 李秋荻[1] 冯艳[1] 李志云[1] 王一菁[1] 

机构地区：[1]南开大学新能源材料化学研究所

出　　处：《高等学校化学学报》2003年第4期584-587,共4页Chemical Journal of Chinese Universities

基　　金：国家重点基础研究发展规划项目 (批准号 :G2 0 0 0 0 2 64 0 5 );"八六三"计划 (批准号 :2 0 0 1AA 5 15 0 2 2 );天津市自然科学基金 (批准号 :0 1360 32 11);南开大学.天津大学联合研究院资助

摘　　要：采用机械合金化法成功制备了 Mg1 - x Tix Ni( 0≤ x≤ 0 .4)系列三元合金 .XRD结构分析表明 ,不同成分的合金在相同的球磨时间下非晶化程度有所区别 ,并且合金的非晶化程度随着球磨时间的增加而趋于完全 .少量 Ti的加入使得该系列合金的电化学性能及循环稳定性都有所提高 .在球磨 1 2 0 h的该系列合金中 ,Mg0 .9Ti0 .1 Ni合金的最大初始放电容量达到 3 5 6.85 m A·h· g- 1 ( 1 0 0 m A·g- 1 ,-0 .5 V vs.Hg/Hg O) ,而Mg0 .7Ti0 .3Ni合金的循环稳定性最好 .Ti的加入亦提高了合金的抗腐蚀性能 。The Mg based hydrogen storage alloys Mg 1- x Ti x Ni(0≤ x ≤0.4) were successfully synthesized by mechanical alloying(MA). The X ray diffraction showed that the amorphous structures of the alloys were different from the diverse components and would be completed with increasing the ball milling time. It was found that the discharge capacity and the cycle life of the alloys were improved with Ti partial substitution. Among the alloys which were prepared by ball milling for 120 h, the discharge capacity of the Mg 0.9 Ti 0.1 Ni alloy electrode was 356.85 mA·h ·g -1 (100 mA·g -1 , -0.5 V vs . Hg/HgO) in the first charge discharge cycle, and Mg 0.7 Ti 0.3 Ni showed the best cycle life. It was also found that the Ti partial substitution was more effective to improve the anti corrosion behavior.

关 键 词：合成 性能 镁基储氢合金 机械合金化法 非晶化 镍氢电池 负极材料 镁钛镍合金 

分 类 号：TM912[电气工程—电力电子与电力传动] TG139.7[一般工业技术—材料科学与工程]