| Cycle stability of La0.7Mg0.3Ni2.55-xCo0.45Cux （x=0-0.4） electrode alloys |
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| 引用本文： | 张羊换,赵栋梁,李保卫,任慧平,董小平,王新林.Cycle stability of La0.7Mg0.3Ni2.55-xCo0.45Cux （x=0-0.4） electrode alloys[J].中国有色金属学会会刊,2007,17(4):816-822. |
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| 作者姓名： | 张羊换 赵栋梁 李保卫 任慧平 董小平 王新林 |
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| 作者单位： | [1]Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China [2]School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China [3]School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| 摘 要： | La0.7Mg0.3Ni2.55-xCo0.45Cux（x=0, 0.1, 0.2, 0.3, 0.4） electrode alloys were prepared by casting and rapid quenching. Ni in the alloy was partially substituted by Cu in order to improve the cycle stability of La-Mg-Ni system （PuNi3-type） hydrogen storage alloy. The effects of substituting Ni with Cu on the microstructures and cycle stability of the alloys were investigated in detail. The results obtained by XRD, SEM and TEM show that the substitution of Cu for Ni is favourable for the formation of an amorphous in the as-quenched alloy, and this leads to an obvious refinement of the as-quenched alloy grains and a growth of the lattice constants and cell volumes of the as-cast and quenched alloys. The results obtained by the electrochemical measurement indicate that the cycle stability of the alloys significantly rises with the incremental variety of Cu content. When Cu content changes from 0 to 0.4, the cycle lives of the as-cast and quenched （30 m/s） alloys are enhanced from 72 to 88 cycles and from 100 to 121 cycles, respectively.
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| 关 键 词： | 镧镁镍合金 微观结构 周期稳定性 电极合金 |
| 收稿时间： | 17 October 2006 |
| 修稿时间： | 2006-10-172007-06-18 |
Cycle stability of La0.7Mg0.3Ni2.55-xCo0.45Cux (x=0-0.4) electrode alloys |
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| ZHANG Yang-huan,ZHAO Dong-liang,LI Bao-wei,REN Hui-ping,DONG Xiao-ping,WANG Xin-lin.Cycle stability of La0.7Mg0.3Ni2.55-xCo0.45Cux (x=0-0.4) electrode alloys[J].Transactions of Nonferrous Metals Society of China,2007,17(4):816-822. |
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| Authors: | ZHANG Yang-huan ZHAO Dong-liang LI Bao-wei REN Hui-ping DONG Xiao-ping WANG Xin-lin |
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| Affiliation: | 1. Department of Functional Material Research, Central Iron and Steel Research Institute, Beijing 100081, China; 2. School of Material and Metallurgy, Inner Mongolia University of Science and Technology, Baotou 014010, China; 3. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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| Abstract: | The La0.7Mg0.3Ni2.55-xCo0.45Cux (x=0, 0.1, 0.2, 0.3, 0.4) electrode alloys were prepared by casting and rapid quenching. Ni in the alloy was partially substituted by Cu in order to improve the cycle stability of La-Mg-Ni system (PuNi3-type) hydrogen storage alloy. The effects of substituting Ni with Cu on the microstructures and cycle stability of the alloys were investigated in detail. The results obtained by XRD, SEM and TEM show that the substitution of Cu for Ni is favourable for the formation of an amorphous in the as-quenched alloy, and this leads to an obvious refinement of the as-quenched alloy grains and a growth of the lattice constants and cell volumes of the as-cast and quenched alloys. The results obtained by the electrochemical measurement indicate that the cycle stability of the alloys significantly rises with the incremental variety of Cu content. When Cu content changes from 0 to 0.4, the cycle lives of the as-cast and quenched (30 m/s) alloys are enhanced from 72 to 88 cycles and from 100 to 121 cycles, respectively. |
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| Keywords: | La-Mg-Ni alloy La0 7Mg0 3Ni2 55-x alloy Ni microstructures cycle stability |
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