| La_(15-x)Nd_xFe_(14)Ni_(64)Mn_5B_2(x=0～6)储氢合金的结构和电化学性能 |
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| 引用本文： | 张秀飞,李宝犬,李金,王利,闫慧忠,赵增祺.La_(15-x)Nd_xFe_(14)Ni_(64)Mn_5B_2(x=0～6)储氢合金的结构和电化学性能[J].稀土,2010,31(6). |
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| 作者姓名： | 张秀飞 李宝犬 李金 王利 闫慧忠 赵增祺 |
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| 作者单位： | 内蒙古科技大学材料及冶金学院;包头稀土研究院;稀土冶金及功能材料国家工程研究中心; |
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| 基金项目： | 科技型中小企业技术创新基金无偿资助项目，内蒙古科技创新引导奖励资金项目 |
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| 摘 要： | 采用中频感应熔炼-快淬炉制备了La15-xNdxFe14Ni64Mn5B2(x=0、2、4、6)储氢合金。扫描电镜(SEM)及能谱(EDS)分析表明,这些合金由(La,Nd)Ni5相、(Fe,Ni)相和(La,Nd)3Ni13B2相组成。X射线衍射(XRD)分析表明,Nd含量对合金的相组成没有影响,但随Nd含量的增加,衍射峰向高角度方向轻微位移。电化学测试表明,随x值的增大,合金电极的放电容量及高倍率放电能力(HRD)先增加后减小,x=2时的放电容量(302mAh.g-1)最高,HRD值(1050 mA.g-1放电时为65.6%)最大。充放电循环稳定性随x值的增大而增加。适量的Nd替代La有利于改善LaFeNiMnB储氢合金的综合电化学性能。
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| 关 键 词： | La-Fe-B系储氢合金 相结构 电化学性能 HRD |
Structural and Electrochemical Properties of La15-xNdxFe14Ni64Mn5B2(x=0～6)Hydrogen Storage Alloys |
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| ZHANG Xiu-fei,LI Bao-quan,LI Jin,WANG Li,YAN Hui-zhong,ZHAO Zeng-qi.Structural and Electrochemical Properties of La15-xNdxFe14Ni64Mn5B2(x=0～6)Hydrogen Storage Alloys[J].Chinese Rare Earths,2010,31(6). |
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| Authors: | ZHANG Xiu-fei LI Bao-quan LI Jin WANG Li YAN Hui-zhong ZHAO Zeng-qi |
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| Affiliation: | ZHANG Xiu-fei1,3,LI Bao-quan2,LI Jin2,WANG Li2,YAN Hui-zhong2,ZHAO Zeng-qi2,3(1.College of Material and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China,2.National Engineering Research Centre of Rare Earth Metallurgy and Functional Materials,Baotou 014030,3.Baotou Research Institute of Rare Earths,China) |
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| Abstract: | La15-xNdxFe14Ni64Mn5B2(x=0,2,4,6) hydrogen storage alloys were prepared by mid-frequency induction melting and rapid quenching.SEM and EDS results showed that all alloys consist of(La,Nd)Ni5,(Fe,Ni) and(La,Nd)3Ni13B2 phases.XRD patterns illustrated Nd substitution had no impact on phase composition except for slight movement of diffraction peaks to high angle direction with increasing x value.Electrochemical investigation indicated that the maximum capacity and HRD of the alloy electrodes first increased an... |
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| Keywords: | La-Fe-B system hydrogen storage alloy phase structure electrochemical properties HRD |
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