| Electrochemical properties of cobalt-free La0.80Mg0.20Ni2.85Al0.11M0.53 （M=Ni, Si, Cr, Cu, Fe） alloys |
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| 引用本文： | 徐国昌,韩树民,蒿建生,冯忠厚,李媛,谢丹阳. Electrochemical properties of cobalt-free La0.80Mg0.20Ni2.85Al0.11M0.53 （M=Ni, Si, Cr, Cu, Fe） alloys[J]. 中国稀土学报(英文版), 2009, 27(2): 250-254. DOI: 10.1016/S1002-0721(08)60229-X |
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| 作者姓名： | 徐国昌 韩树民 蒿建生 冯忠厚 李媛 谢丹阳 |
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| 作者单位： | XU Guochang,HAN Shumin(State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China;College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China);HAO Jiansheng(College of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao 066004,China);FENG Zhonghou,LI Yuan,XIE Danyang(State Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao 066004,China) |
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| 基金项目： | 国家自然科学基金，河北省自然科学基金，Support Program for Hundred Excellent Innovation Talents from the Universities and Colleges of Hebei Province |
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| 摘 要： |
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| 关 键 词： | 镍基合金 电化学性能 无钴 LaNi5 铬 铜 铁 硅 |
| 收稿时间： | 2008-09-02 |
Electrochemical properties of cobalt-free La0.80Mg0.20Ni2.85Al0.11M0.53 (M=Ni, Si, Cr, Cu, Fe) alloys |
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| XU Guochang,HAN Shumin,HAO Jiansheng,FENG Zhonghou,LI Yuan,XIE Danyang. Electrochemical properties of cobalt-free La0.80Mg0.20Ni2.85Al0.11M0.53 (M=Ni, Si, Cr, Cu, Fe) alloys[J]. Journal of Rare Earths, 2009, 27(2): 250-254. DOI: 10.1016/S1002-0721(08)60229-X |
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| Authors: | XU Guochang HAN Shumin HAO Jiansheng FENG Zhonghou LI Yuan XIE Danyang |
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| Affiliation: | [1]State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China [2]College of Environmental and Chemical Engineering, Yanshan University, Qinhnangdao 066004, China |
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| Abstract: | In order to investigate the effect of different B-site additions on phase structure and electrochemical properties of cobalt-free La-Mg-Ni based alloys, La0.80Mg0.20Ni2.85Al0.11M0.53 (M=Ni, Si, Cr, Cu, Fe) hydrogen storage alloys were prepared and studied systemati-cally. X-ray powder diffraction showed that the alloys consisted mainly of LaNi3 phase and LaNi5 phase except that Cr addition caused a minor Cr phase. Electrochemical testing indicated that alloys with additional Ni, Cr, Cu or Fe were activated within only 1-2 cycles, while that with Si addition needed 4 cycles. Adding Si, Cu and Fe increased cycling stability of La-Mg-Ni based alloys. However, maximum discharge capacity decreased from 362 mAh/g to 215 mAh/g in the order of Ni>Fe>Cu>Cr>Si. In addition, electrochemical kinetics of alloy electrodes was also researched by measuring high rate discharge ability (HRD), hydrogen diffusion coefficient (D) and limiting current density (IL). |
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| Keywords: | hydrogen storage alloy La-Mg-Ni based alloys electrochemical properties cycling stability rare earths |
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