采用恒电位法、EIS分析及双电极系统对La0.8Mg0.2(Ni2.7 C%o.6 Al0.1Mn0.1)x(x=0.9～1.10)系列合金进行电化学性能分析.结果表明,x=1.05的合金具有较好的自放电性能(CR=97.3％),而x=1.10的合金有较高的电化学容量(369 mAh·g-1).合金电极的电化学阻抗谱(EIS)表明,随着化学计量比x的增大,合金电极的电荷迁移电阻先减小后增大,动力学性能先增强后减弱.线性极化测试表明,随着化学计量比x的增大,合金电极表面的电化学反应速率先增大后减小.通过合金电极阳极电流对时间响应的半对数曲线计算的氢扩散系数D随着化学计量比x的增大先增大后降低,说明合金内部的氧扩散能力先增强后降低.
参考文献
| [1] | 陈立新.贮氢电极合金Ml（NiMnTi）4.2Co0.8-xFex（x=0～0.8）的电化学性能[J].稀有金属材料与工程,1999(05):302. |
| [2] | Hu WK .Studies on cobalt-free AB sub 5 -type hydrogen storage alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1999(1/2):299-305. |
| [3] | 李世群,陈立新,郭蕊,张书凯,应窕,雷永泉.RENi4.3-xCoxMn0.4Al0.3贮氢合金（x=0.5～1.3）的相结构及高温电化学性能[J].稀有金属材料与工程,2003(03):228-231. |
| [4] | 魏范松,雷永泉,陈立新,廖彬,应窕,葛红卫,吕光烈.低Co贮氢合金ReNi3.5Co0.3Mn0.3Al0.4Fe0.5-xSnx（x=0～0.4）的相结构和电化学性能[J].材料科学与工程学报,2003(03):323-326. |
| [5] | 李甜甜,李琳,刘宝林,王艳.La0.8Mg0.2（Ni27Co0.6Al0.1Mn0.1）x贮氢合金的节能分析[J].电池工业,2011(01):33-36. |
| [6] | Kohno T.;Yoshida H. .Hydrogen storage properties of new ternary system alloys: La_2MgNi_9, La_5Mg_2Ni_(23), La_3MgNi_(14)[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(2):L5-L7. |
| [7] | Zhang G;Chen J .Batteries,fuel cells and energy conversion-synthesis and application of La0.59 Ca0.41CoO3Nanotubes[J].Journal of the Electrochemical Society,2005,152(10):2695-2700. |
| [8] | 闫慧忠,孔繁清,熊玮,李宝犬,李金,朱敏.La0.55Pr0.05NdxMg0.4-xNi3.3Al0.1（x = 0.10～0.20）储氢合金的研究Ⅱ：电化学性能[J].稀土,2008(02):1-6. |
| [9] | Kuriyama N;Sakai T;Miyamura H et al.Surface treatment of a LaNi5-type metal-hydride electrode with an alkaline solution dissolving cobalt (Ⅱ) hydroxide[J].Journal of Alloys and Compounds,1993,238(01):183-197. |
| [10] | Higuchi E;Toyoda E;Peng Li Z et al.Effects of fluorination of AB2-type alloys and of mixing with AB5-type alloys on the charge-disharge characteristics[J].Electrochimica Acta,2001,46(08):4383-4386. |
| [11] | Khaldi C;Mathlouthi H;Lamloumi J et al.Electrochemical study of cobalt-free AB5-type hydrogen storage alloys[J].International Journal of Hydrogen Energy,2004,29:307-401. |
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