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刘淑辉,覃铭,卿培林,黄显吞,黄红强,郭进.(La1-xNdx)2Mg(Ni0.8Co0.15Mn0.05)9(x=0~0.3)合金的储氢与电化学性能研究[J].广西科学,2011,18(3):242-245. [点击复制]
- LIU Shu-hui,QIN Ming,QING Pei-lin,HUANG Xian-tun,HUANG Hong-qiang,GUO Jin.Study on the Hydrogen Storage and Electrochemical Characteristics of (La1-xNdx)2Mg (Ni0.8Co0.15Mn0.05)9(x=0~0.3) Alloys[J].Guangxi Sciences,2011,18(3):242-245. [点击复制]
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| (La1-xNdx)2Mg(Ni0.8Co0.15Mn0.05)9(x=0~0.3)合金的储氢与电化学性能研究 |
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刘淑辉1,2, 覃铭1,2, 卿培林1,2, 黄显吞1,2, 黄红强1,2, 郭进1
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| (1.广西大学物理科学与工程技术学院, 广西南宁 530004;2.百色学院物理与电信工程系, 广西百色 533000) |
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| 摘要: |
| 采用高频悬浮感应熔炼方法制备(La1-xNdx)2Mg (Ni0.8Co0.15Mn0.05)9(x=0~0.3)系列合金,分析Nd部分取代La对合金的相结构、吸放氢性能和电化学性能的影响。结果表明,铸态合金的主相为具有六方CaCu5结构的LaNi5相,并存在具有立方MgCu2结构的LaNi2相以及LaMg3相。合金主相的晶格常数和晶胞体积随着Nd取代量的增加相应减小。Nd部分取代La后,合金的最大储氢容量降低,从x=0时的1.39wt%逐渐降低至x=0.3时的1.04wt%,同时吸放氢平台压升高;合金的最大放电容量从361.5mA·h/g (x=0)依次降低至352.8mA·h/g (x=0.3),但是循环稳定性能得到改善。 |
| 关键词: 储氢合金 PCT性能 电化学性能 |
| DOI： |
| 投稿时间：2011-01-07 |
| 基金项目:国家自然科学基金项目(50561002、50861003);广西自然科学基金重点项目(2010GXNSFD013004);广西教育厅科研项目(200911MS226);百色学院科研项目(2010KB15);广州大学-百色学院科研合作项目(GBK2010007、GBK2010008)资助 |
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| Study on the Hydrogen Storage and Electrochemical Characteristics of (La1-xNdx)2Mg (Ni0.8Co0.15Mn0.05)9(x=0~0.3) Alloys |
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LIU Shu-hui1,2, QIN Ming1,2, QING Pei-lin1,2, HUANG Xian-tun1,2, HUANG Hong-qiang1,2, GUO Jin1
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| (1.College of Physical Science and Technology, Guangxi University, Nanning, Guangxi, 530004, China;2.Department of Physics and Telecom Engineering, Baise University, Baise, Guangxi, 533000, China) |
| Abstract: |
| (La1-xNdx)2Mg (Ni0.8Co0.15Mn0.05)9 (x=0~0.3)hydrogen storage alloys were prepared by inductive melting, the effects of substitution of Nd for La on the phase structure, hydrogen storage properties and electrochemical characteristics of the alloys were studied systematically.The results show that the alloys are mainly consisted of the LaNi5 phase with the hexagonal CaCu5-type structure, the LaNi2 and the LaMg3 phase.The lattice parameters and cell volumes of the component phases gradually decrease as the increase in addition of Nd content.With substitution of Nd for La, the hydrogen storage capacity and discharge capacity decrease from 1.39 wt% (x=0) to 1.04 wt% (x=0.3) and from 371.7mA·h/g (x=0) to 366.1mA·h/g (x=0.3), respectively.However, the cycling life can be improved by Nd added. |
| Key words: hydrogen storage alloy PCT properties electrochemical characteristics |
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