| 钇替代镧对La-Mg-Ni系储氢合金晶体结构及其电化学性能的影响 |
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| 引用本文： | 黄勇平,杨琨,谢亚林,王彤,吴建民. 钇替代镧对La-Mg-Ni系储氢合金晶体结构及其电化学性能的影响[J]. 中国稀土学报, 2011, 29(4) |
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| 作者姓名： | 黄勇平 杨琨 谢亚林 王彤 吴建民 |
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| 作者单位： | 北京宏福源科技有限公司,北京,100101 |
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| 基金项目： | 国家高技术研究发展计划(863计划)资助项目(2009AA03Z230) |
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| 摘 要： | 通过少量Y对La的取代,研究了La0.75-xYxMg0.25Ni3.17Al0.13和La0.75-xYxMg0.25Ni3.37Al0.13(其中x=0.00,0.05,0.10)体系中Y对合金晶体结构及电化学性能的影响。通过X射线衍射实验、电化学性能测试,结果表明上述两体系主相为Ce2Ni7相、Pr5Co19相。少量的取代对活化性能、最大放电容量影响不大,但对循环稳定性、放氢平台压影响显著,而且在不同主相结构中,影响效果不一样。当x从0.00增大到0.10时:主相为Ce2Ni7相La0.75-xYxMg0.25Ni3.17Al0.13的S80%由222周下降到112周,放氢平台压则由0.015 MPa上升到0.045 MPa;而主相为Pr5Co19相La0.75-xYxMg0.25Ni3.37Al0.13的S80%由172周下降到127周,放氢平台压则由0.019 MPa上升到0.076 MPa。
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| 关 键 词： | La-Mg-Ni系储氢合金 循环稳定性 P-C-T曲线 晶体结构 稀土 |
Effect of Substituting Yttrium for Lanthanum on Crystal Structure and Electrochemical Properties of La-Mg-Ni Hydrogen Storage Alloy |
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| Huang Yongping,Yang Kun,Xie Yalin,Wang Tong,Wu Jianmin. Effect of Substituting Yttrium for Lanthanum on Crystal Structure and Electrochemical Properties of La-Mg-Ni Hydrogen Storage Alloy[J]. Journal of the Chinese Society of Rare Earths, 2011, 29(4) |
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| Authors: | Huang Yongping Yang Kun Xie Yalin Wang Tong Wu Jianmin |
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| Affiliation: | Huang Yongping,Yang Kun,Xie Yalin,Wang Tong,Wu Jianmin(Beijing Harmofinery Technology Co.LTD,Beijing 100101,China) |
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| Abstract: | The effects of partially substituting Y for La on the crystal structure as well as on the electrochemical properties of the La0.75-xYxMg0.25Ni3.17Al0.13 and La0.75-xYxMg0.25Ni3.37Al0.13(x=0.00,0.05,0.10) were investigated by means of powder X-ray diffraction(XRD) and electrochemical measurements.The XRD results suggested that the La0.75-xYxMg0.25Ni3.17Al0.13 were mainly composed of Ce2Ni7-type structure,while the La0.75-xYxMg0.25Ni3.37Al0.13 were mainly composed of Pr5Co19-type structure.By the partially su... |
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| Keywords: | La-Mg-Ni hydrogen storage alloy cycle stability P-C-T curves crystal structure rare earths |
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