| CuxBy表面修饰对Mg50Ni50合金循环稳定性的影响 |
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| 引用本文： | 杨桂玲,李星国,李 楠,韩 飞,杨晓民,谢 镭. CuxBy表面修饰对Mg50Ni50合金循环稳定性的影响[J]. 稀有金属材料与工程, 2009, 38(8): 1373-1377 |
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| 作者姓名： | 杨桂玲 李星国 李 楠 韩 飞 杨晓民 谢 镭 |
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| 作者单位： | 1. 河北北方学院,河北,张家口,075000
2. 北京大学,北京,100871 |
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| 基金项目： | 张家口市科学技术研究与发展计划 |
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| 摘 要： | 用机械合金化法合成了CuxBy合金和非晶态Mg50Ni50储氢合金.用同样的方法以CuxBy对非晶态Mg50Ni50合金进行表面修饰.探索了不同组成的CuxBy合金、同一组成不同比例(质量比,下同)的修饰对Mg50Ni50合金电极循环稳定性的影响.结果表明:不同组成的CuxBy合金对Mg50Ni50合金的表面修饰,都不同程度地提高了Mg50Ni50合金电极的循环稳定性.同一组成不同比例的修饰,对Mg50Ni50合金电极循环稳定性改性效果差异较大.当Mg50Ni50:Cu0..9B0.1=5:1时,初始放电容量为465 mAh·g-1,第50个循环放电容量为222 mAh·g-1.在保持高放电容量的前提下,有效地提高了非晶态Mg50Ni50合金电极的循环稳定性.
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| 关 键 词： | 非晶态镁基储氢合金 表面修饰 循环稳定性 |
| 收稿时间： | 2008-07-31 |
| 修稿时间： | 2009-05-25 |
Effect of Surface Modification by CuxBy on Cycle Stability of Mg50Ni50 Alloy |
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| Yang Guiling,Li Xingguo,Li Nan,Han Fei,Yang Xiaomin and Xie Lei. Effect of Surface Modification by CuxBy on Cycle Stability of Mg50Ni50 Alloy[J]. Rare Metal Materials and Engineering, 2009, 38(8): 1373-1377 |
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| Authors: | Yang Guiling Li Xingguo Li Nan Han Fei Yang Xiaomin Xie Lei |
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| Affiliation: | Hebei North University, Zhangjiakou 075000, China;Peking University, Beijing 100871, China;Hebei North University, Zhangjiakou 075000, China;Hebei North University, Zhangjiakou 075000, China;Hebei North University, Zhangjiakou 075000, China;Peking University, Beijing 100871, China |
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| Abstract: | The CuxBy alloy and amorphous Mg50Ni50 hydrogen storage alloy were synthesized by mechanical alloying method (MA). And then surface modification of the amorphous Mg50Ni50 alloy was done using CuxBy by the same method. Effects of CuxBy with different composition and different doping ratio of CuxBy (the same composition) on the cycle stability of Mg50Ni50 alloy electrode were investigated. Results show that the surface modification through CuxBy with different composition can increase the cycle stability of Mg50Ni50 alloy electrode to different extent. However, the surface modification effects of CuxBy with the same composition but different doping ratio on the cycle stability of Mg50Ni50 alloy electrode have obvious difference. When Mg50Ni50:Cu0.9B0.1=5:1, the initial discharge capacity was 465 mAh·g-1, and the 50th one was 222 mAh·g-1. On the condition of keeping high discharge capacity, the cycle stability of amorphous Mg50Ni50 alloy was improved effectively. |
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| Keywords: | amorphous Mg-based hydrogen storage surface modification cycle stability |
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