75%La(Ni_(0.85)Co_(0.15))_(5-x)(Mn_(0.4)Al_(0.3))_x+12.5%Mg_2Ni(x=0,0.3,0.6)合金储氢性能研究  

Study on the Hydrogen-storage Characteristics of 75%La(Ni_(0.85)Co_(0.15))_(5-x)(Mn_(0.4)Al_(0.3))_x+12.5%Mg_2Ni(x=0,0.3,0.6)Alloys

作　　者：张丹丹[1] 高召习[1] 伍倩倩[1] 冉辉[1] 蓝志强[1] 郭进[1] 

机构地区：[1]广西大学物理科学与工程技术学院,广西南宁530004

出　　处：《广西科学》2010年第2期129-131,137,共4页Guangxi Sciences

基　　金：国家自然科学基金项目(50561002;50861003);广西自然科学基金项目(桂科自0728028);广西研究生科研创新项目(编号:10593090308)资助

摘　　要：利用高频感应熔炉制备摩尔比率为75%La(Ni0.85Co0.15)5-x(Mn0.4Al0.3)x+12.5%Mg2Ni(x=0,0.3,0.6)合金,测试合金的储氢性能,分析Mn、Al元素组合对合金储氢性能的影响。结果发现,合金均由多相组成,其中主相分别是CaCu5型的LaNi5相和PuNi3型的(La,Mg)Ni3相。随着元素(Mn,Al)含量增大,合金电极的循环稳定性有一定的改善,80次循环放电容量保持率从x=0时的59.1%提高到x=0.6时的74.5%。The 75%La（Ni0.85Co0.15）5-x（Mn0.4Al0.3）x＋12.5%Mg2Ni（x=0,0.3,0.6）alloys were prepared by high frequency induction furnace and their hydrogen-storage characteristics were tested systematically.The result showed that the alloys consist of multi-phases,and the main phases were LaNi5 phase with a hexagonal CaCu5-type structure and LaNi3 phase with PuNi3-type structure,and the stability of charging-discharging cycle was improved as the content of metals（Mn,Al）increased.The discharge capacity retention after 80 charging-discharging cycles increased from 59.1%（x=0）to 74.5%（x=0.6）.

关 键 词：合金 La-Mg-Ni基储氢合金 储氢性能 循环寿命 

分 类 号：TG113.2[金属学及工艺—物理冶金]