摘要本文从国内外储氢合金的历史发展和研究现状出发，综合描述了稀土系，镁系，钛系，锆系及钒基固溶体系等储氢合金的发展与研究，在此基础上选取La0。85Mg0。15Ni2。75Co1。05储氢合金作为研究对象，在氩气保护下的磁悬浮炉中进行熔炼，熔炼后手工研磨，将不同元素粉末混合均匀后压片，制作成电极片，然后把合金放到真空容器中在1223K温度下进行退火处理，退火时间分别为4h、8h、16h，测试其退火时间的不同对电化学性能和动力学性能所产生的影响。退火处理后，合金主要由LaNi5相、La4MgNi19相(A5B19型结构：Ce5Co19+Pr5Co19)和Ce2Ni7相组成。经电化学测试研究发现，储氢合金电极电化学性能与A5B19型相的相丰度有紧密关系。主相A5B19的相丰度最大时，电化学性能最好。但从实验数据中可以看出，A5B19的相丰度不是随退火时间的延长一直增加，而是先减后增的变化趋势，这是因为部分合金元素在高温时的产生烧损和挥发使得主相的减少降低了合金综合性能。87087

毕业论文关键词：储氢合金 La0。85Mg0。15Ni2。75Co1。05  退火时间 合金相结构 

Abstract In this paper, From the history of the development and research status at home and abroad starting hydrogen storage alloy, a comprehensive description of the research and development of rare-earth-based, magnesium-based, titanium-based, zirconium and vanadium-based solid solution system, and hydrogen storage alloys, on this basis, select La0。85Mg0。15Ni2。75Co1。05 hydrogen storage alloy as the research object, the magnetic levitation furnace under an argon atmosphere in the melting, melting after hand-grinding, the powder was mixed different elements tablet, made into an electrode sheet, and then put the alloy into the vacuum container in the 1223K temperature annealing treatment, the annealing time is 4h, 8h, 16h, electrochemical properties and different effects on the dynamic performance of the generated test the annealing time at 1223K。 After annealing, an alloy mainly composed of LaNi5 phase, La4MgNi19 phase (A5B19 structure: Ce5Co19 + Pr5Co19) and Ce2Ni7 phase。 After electrochemical study found that compared the abundance of hydrogen storage alloy electrode electrochemical characteristics and A5B19 type phase has a close relationship。 Maximum relative abundance of the main phase A5B19, the best electrochemical performance。 However, the experimental data can be seen, A5B19 relative abundance is not always increased with annealing time, but the first reduction after increasing trend, because a portion of alloying elements in the production of high temperature burning and volatile so that the main reduction phase alloy reduces the overall performance。

Key words: Hydrogen storage alloy  La0。85Mg0。15Ni2。75Co1。05  Annealing time Alloy phase structure 

目录

第一章 绪论 1

1。1引言 1

1。2 储氢合金的发展历史 2

1。2。1 储氢合金的发展 2

1。2。2 储氢方式 2

1。2。3 储氢合金的基本类型 3

1。2。4 A侧元素对储氢合金性能的影响 6

1。2。5 B侧元素对储氢合金性能的影响 6

1。3 MH/Ni电池 7

1。3。1 MH/Ni电池的的发展及应用 7

1。3。2 MH/Ni电池的工作原理 7

1。4 本课题的研究意义和内容 9