对低钴稀土系贮氢合金Ml(Ni0.78Co0.08Al0.06Mn0.08)x(4.8≤x≤5.4)的相结构及电化学性能进行了研究.结果表明:在4.8≤x≤5.2的合金中除CaCu5型结构的主相之外,还出现LaNi3第二相,而且合金中第二相(LaNi3)的析出量随着x值的增大而减少,化学计量比x=5.4的合金则有富镍相析出,B侧合金化使低钴贮氢合金形成单相AB5型合金的化学计量比由x=5.0增大至5.2～5.4之间.四种不同化学计量比合金的活化性能都较好,合金的最大放电容量随化学计量比x的增大而增加,过化学计量比(x=5.4)合金具有最大的放电容量,最优的放电电压特性及最佳的循环稳定性,且其高倍率放电性能也较好.
参考文献
| [1] | Nogami M;Tadokoro M;Chikkano Y et al.Development of hydrogen-absorbing alloys for nickel-metal hydride secondary batteries[J].Journal of Alloys and Compounds,1993,61:1088. |
| [2] | Notten P H L;Einerhand R E F;Daams J L C .On the nature of the electrochemical cycling stability of non-stoichiometric LaNi5-based hydride-forming compounds(I).Crystallography and elctrochemistry[J].Journal of Alloys and Compounds,1994,210:221-223. |
| [3] | 李平,王新林,林玉芳,李蓉,吴建民.低钴AB5型稀土系贮氢电极合金的研究[J].中国稀土学报,2003(01):61-65. |
| [4] | 李全安,桑革,李建文,陈云贵,唐定骧,涂铭旌.多元低钴稀土基贮氢合金及其电极特性[J].稀土,2000(04):30-33,46. |
| [5] | Kadama T .The thermodynamic parameters for the LaNi5-xAlx-H2 and MmNi5-xAlx-H2 system[J].Journal of Alloys and Compounds,2000,297:73-80. |
| [6] | 王超群;靳红梅 等.稀土贮氢合金相结构研究[J].电源技术,1998,22(03):107-110. |
| [7] | 吕建国,黄靖云,叶志镇.AB5型贮氢合金及其优化设计[J].金属功能材料,2001(04):5-12. |
| [8] | 张羊换,陈梅艳,林玉芳,祁焱,王新林.非化学计量比对贮氢合金Mm（NiCoMnAl）5Bx电化学性能的影响[J].包头钢铁学院学报,2003(01):36-41. |
| [9] | Takaguchi Y.;Tanaka K. .Hydriding-dehydriding characteristics of NdNi_5 and effects of Sn- substitution[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):73-80. |
| [10] | 李全安,陈云贵,涂铭旌,桑革,韩满贵,李宁,唐定骧.高性能贮氢合金电极的成分设计[J].电源技术,2000(04):246-250. |
| [11] | Bala S Haran;Branko N Popov;Ralph E White .Studies on electroless cobalt coating for microencapsulation of hydrogen storage alloys[J].Journal of the Electrochemical Society,1998,145(09):3000. |
| [12] | 田娜,井晓天,卢正欣.稀土-镍系贮氢合金研究与开发现状[J].稀土,2001(02):53-58. |
| [13] | 李平,王新林,赵韦人,吴建民.低钴无钴贮氢合金研究的进展[J].电池,2002(04):238-241. |
| [14] | Yuexiang Huang;Hui Ye;Hong Zhang .Characteristics of a cobalt-free ML(NiCuAl)_(5.2) alloy obtained by different casting processing methods[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(0):851-854. |
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