| Phase Structure and Electrochemical Properties of RE-Mg Based Composite Hydrogen Storage Alloys |
| |
| 引用本文： | 韩树民,刘宝忠,张忠,朱惜林,王晓铁,荆天辅. Phase Structure and Electrochemical Properties of RE-Mg Based Composite Hydrogen Storage Alloys[J]. 中国稀土学报(英文版), 2004, 22(6): 878-881 |
| |
| 作者姓名： | 韩树民 刘宝忠 张忠 朱惜林 王晓铁 荆天辅 |
| |
| 作者单位： | Department of Environmental and Chemical Engineering，Yanshan University，Department of Environmental and Chemical Engineering，Yanshan University，Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Corporation Limited，Baotou 014030，China，Key Laboratory of Metastable Materials Science and Technotogy，Qinhuangdao O66004，China，Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Corporation Limited，Baotou 014030，China，Key Laboratory of Metastable Materials Science and Technotogy，Qinhuangdao O66004，China，Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Corporation Limited，Baotou 014030，China，Key) Laboratory of Metastable Materials Science and Technotogy，Qinhuangdao O66004，China Qinhuangdao 066004，China，Inner Mongolia Rare Earth Ovonic High-Power MH/Ni Battery Corporation Limited，Baotou 014030，China，Key Laboratory of Metastable Materials Science and Technotogy，Qinhuangdao O66004，China，Qinhuangdao 066004，China |
| |
| 基金项目： | ProjectsupportedbytheNaturalScienceFoundationofHebeiProvince(B2 0 0 40 0 0 188)，theChinaPostdoctoralScienceFounda tion(2 0 0 40 3 5 0 5 8) |
| |
| 摘 要： | Rareearth basedAB5 typealloy ,akindofhy drogenstoragealloyusedasnegativeelectrodemateri alsofthenickel/metalhydride (Ni/MH )secondarybattery ,haseasyinitialactivation ,longcyclelifeandlowcost ,butstillasmalldischargecapacity ,poorhigh ratedischargeability(HRD)andpoorpropertiesatlowtemperature[1,2 ] .Therefore ,howtoincreaseitsdischargecapacityandtoimproveotherelectrochemi calpropertiesismeaningfulbothintheoryandinpracticalapplication .Mg basedhydrogenstorageal loysareremarkablebecauseofitsr…
|
| 关 键 词： | 相位结构 电化学性质 储氢合金 RE-Mg 稀土元素 |
Phase Structure and Electrochemical Properties of RE-Mg Based Composite Hydrogen Storage Alloys |
| |
| Han ShuminLiu Baozhong. Phase Structure and Electrochemical Properties of RE-Mg Based Composite Hydrogen Storage Alloys[J]. Journal of Rare Earths, 2004, 22(6): 878-881 |
| |
| Authors: | Han ShuminLiu Baozhong |
| |
| Abstract: | A new type of AB5-x%LaMg3(x=2, 3, 4, 5, 6, 7, 8)composite hydrogen storage alloys were prepared by sintering the powder mixtures of a commercial AB5 alloy and LaMg3 alloy. The phase structure and electrochemical characteristics of the composite hydrogen storage alloys were also studied. It is shown that AB5-x%LaMg3(x=2, 3, 4, 5, 6, 7, 8)composites have mult; phase structure. The matrix phase has CaCu5 structure, the second phase is LaNi3 phase. The maximum discharge capacity, discharge capacity at low temperature and HRD of AB5 alloy electrodes are greatly improved after the composite. The maximum discharge capacity of the composite electrodes increases from 325 mAh·g-1 for x=0 to 358 mAh·g-1 for x=5, and the HRD of the composites for x=5 at the current density of 1200 mA·g-130% of that of the alloy at 60 mA·g-1. The discharge capacity of AB5-x%LaMg3 composite alloy electrode at 233 K is up to 174 mAh·g-1. The improvement of the electrochemical characteristics of the composite electrodes seems to be related with formation of the LaNi3 second phase. |
| |
| Keywords: | RE-Mg composite hydrogen storage materials electrochemical properties sintering nickel/metal-hydride battery rare earths |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
