选择AB2型Laves相合金Zr0.9Ti0.1(Mn0.35Ni0.55V0.15)2作为添加剂与稀土基AB5型合金进行熔炼处理,制备了AB5-AB2复合合金.XRD表明,制备的AB5-AB2复合合金具有AB5合金的CaCu5主相结构,同时含有少量的AB2合金的C14型Laves相存在.并且,随着AB2含量的增加,复合合金中的第二相含量逐渐增加.通过复合处理,AB5合金的放电容量、循环寿命和倍率放电性能均得到明显提高.AB5-x%AB2复合合金电极的最大放电容量由x=0时的322 mAh·g-1升高到x=1时的331mAh·g-1.AB5-1%AB2复合合金电极,在1500mA·g-1电流密度下的放电容量从62 mAh·g-1提高到185 mAh·g-1,经300次充/放电循环后的容量保持率从44.24%提高到78.51%.
参考文献
| [1] | Seo C Y;Choi S J;Choi J et al.The Influence of titanium on the electrochemical properties of the AB5-type metal hydrides[J].Journal of Alloys and Compounds,2003,350:324. |
| [2] | Hong K .The development ofhydrogen storage alloys and the progress of nickel hydride batteries[J].Journal of Alloys and Compounds,2001,321:307. |
| [3] | Sun D;Latroche M;Guegan A P .Activation behavior of mechanically Ni-coated Zr-based laves phase hydride electrode[J].Journal of Alloys and Compounds,1997,257:302. |
| [4] | 韩树民,赵敏寿,吴耀明,郑炀曾.利用球磨制备AB2-AB5复合贮氢合金及其电极性能和微观结构研究[J].无机化学学报,2003(03):262-266. |
| [5] | Seo C Y;Choi S J;Choi J et al.Effect of Ti and Zr addition on the characteristics of AB5-type hydride electrode for Ni-MH secondary battery[J].Journal of Hydrogen Energy,2003,28:317. |
| [6] | SeoCY;ChoiSJ;ChoiJ et al.Effect of V and Zr on the electrochemical properties of La-based AB5-type metal hydride electrodes[J].Journal of Alloys and Compounds,2003,351:255. |
| [7] | LI C J;Wang X L .Hydrogen storage in mechanically milled MgLaNi5 and MgH2-LaNi5 composites[J].Journal of Alloys and Compounds,1999,284:270. |
| [8] | Bououdina M;Sun D L;Enoki H et al.Improved kinetics by the mult-phase alloys prepared from laves phases and LaNi5[J].Journal of Alloys and Compounds,1999,288:229. |
| [9] | Zhang W K;Ma C A;Yang X G .Crystal structure and electrochemical propertics of Zr ( Mn1 - xNix )2 ( x = 0.40 ～ 0.75 )hydrogen storage alloys[J].Acta Metallurgica Sinica(English Lett),2001,14(01):56. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%