| LaMg11Zr+200%Ni+x%La(x=O,5,10)储氢合金结构及电化学性能 |
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| 引用本文： | 刘子利,闫新春,刘希琴. LaMg11Zr+200%Ni+x%La(x=O,5,10)储氢合金结构及电化学性能[J]. 稀土, 2011, 32(3) |
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| 作者姓名： | 刘子利 闫新春 刘希琴 |
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| 作者单位： | 南京航空航天大学材料科学与工程学院,江苏南京,211100 |
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| 基金项目： | 中国博士后基金，江苏省自然科学基金 |
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| 摘 要： | 采用机械合金化法(MA)制备了非晶态LaMg11Zr+200%(质量分数,下同)Ni+x%La(x=0,5,10)系列储氢合金,并详细研究了La添加对该系列合金的相结构及电化学性能的影响.结构分析表明,球磨20h该系列合金都呈非晶态,La添加后合金颗粒得到明显细化;电化学研究表明,La添加后,合金电极充电阻力减小,放电容量随La含量的增加而增大,适量v的添加一定程度上改善了合金电极的循环稳定性和动力学性能,LaMg11Zr+200%Ni+5%La合金电极达到最大放电容量597.2mAh·g-1,循环30次后的容量保持率仍为53.5%.
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| 关 键 词： | 储氢合金 La添加 相结构 电化学性能 |
Structure and Electrochemical Performance of LaMg11Zr + 200 %Ni + x%La( x =0,5,10) Hydrogen Storage Alloys |
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| LIU Zi-li,YAN Xin-chun,LIU Xi-qin. Structure and Electrochemical Performance of LaMg11Zr + 200 %Ni + x%La( x =0,5,10) Hydrogen Storage Alloys[J]. Chinese Rare Earths, 2011, 32(3) |
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| Authors: | LIU Zi-li YAN Xin-chun LIU Xi-qin |
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| Affiliation: | LIU Zi-li,YAN Xin-chun,LIU Xi-qin(College of Material Science and Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China) |
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| Abstract: | The LaMg11Zr+200%Ni+x%La(x=0,5,10) amorphous alloys were prepared by mechanical alloying(MA),and the effect of La content on the structure and electrochemical properties of MA amorphous alloys had been investigated.The structure analysis of alloys showed that alloys were amorphous after 20h ball-milling,and the La addition significantly refined the alloy particles.The electrochemical test showed that the charging resistance of the alloy electrodes decreased with La addition;the maximum discharge capacity of... |
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| Keywords: | hydrogen storage alloy La addition phase structure electrochemical characteristics |
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