| 引用本文： |
-
刘奕新,陈秋萍,刘淑辉,黎光旭,韦文楼,郭进.La-Mg-Ni基合金储氢性能的研究[J].广西科学,2007,14(4):393-396. [点击复制]
- LIU Yi-xin,CHEN Qiu-ping,LIU Shu-hui,LI Guang-xu,WEI Wen-lou,GUO Jin.Study on Hydrogen Storage Characteristics of La-Mg-Ni Based Alloy[J].Guangxi Sciences,2007,14(4):393-396. [点击复制]
|
|
| 摘要: |
| 采用高频感应熔炼制备La0.7Ca0.3Ni2.8-xMgx(x=0.1、0.2、0.3、0.4)合金,进行X射线衍射(XRD)实验,气相储氢性能测试和电化学性能测试,分析Mg部分替代Ni对合金的储氢和电化学性能的影响。分析结果表明,合金具有多相结构,当x=0.1、0.3时,合金的主相是CaCu5-型结构的LaNi5相,当x=0.2、0.4时,合金的主相是AB2-型Laves相LaNi2相。随x=0.1、0.2、0.3、0.4合金电极的放电容量(mAh/g)依次为244.7、140.8、257.6、164。当x=0.1时,在2MPa氢压、25℃时,合金La0.7Ca0.3Ni2.7Mg0.1的储氢量达到1.1wt%。 |
| 关键词: 合金 La-Mg-Ni基 储氢性能 电化学性能 |
| DOI： |
| 投稿时间：2006-12-22修订日期：2007-01-12 |
| 基金项目:国家自然科学基金项目(50561002);广西科学基金项目(桂科自0728028);广西大学科研重点项目(2004ZD04);广西教育厅科研项目(桂教科研[2006]26-8)资助 |
|
| Study on Hydrogen Storage Characteristics of La-Mg-Ni Based Alloy |
|
LIU Yi-xin, CHEN Qiu-ping, LIU Shu-hui, LI Guang-xu, WEI Wen-lou, GUO Jin
|
| (College of Physics Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China) |
| Abstract: |
| The effect of substituting Ni with Mg in La0.7Ca0.3Ni2.8-xMgx alloy on the hydrogen storage and the electrochemical properties were investigated. XRD analysis shows that the alloys consist of multi-phases.The main phase of La0.7Ca0.3Ni2.8-xMgx alloy (x=0.1, 0.3) is LaNi5 phase with a hexagonal CaCu5-type structure. The main phase of La0.7Ca0.3Ni2.8-xMgx (x=0.2 0.4) is LaNi2 phase with AB2-type laves phase.Electrochemical experimental results show that when x=0.1, 0.2, 0.3 and 0.4 the discharge capacities of the alloy electrodes are 244.7, 140.8, 257.6 and 164 mAh/g, respectively.The P C isotherms experimental results show that the hydrogen absorption capacities of the La0.7Ca0.3Ni2.7Mg0.1 alloy is 1.1wt% at 25℃ and 2MPa hydrogen pressure. |
| Key words: alloy La-Mg-Ni based hydrogen storage characteristic electrochemical property |
