采用XRD和电化学测试的方法研究了Fe、Mn、Si部分替代Ni对LaNi3型贮氢合金氢致非晶化的影响.结果表明:LaNi2.5M0.5(M=Ni,Fe,Mn,Si)贮氢合金的主相均为LaNi3相；在第一次充电后,合金均有一定程度的氢致非晶化现象；LaNi3和LaNi2.5Fe0.5合金的放电曲线没有放电平台,表明合金充电后为非晶态；LaNi2.5Mn0.5和LaNi2.5Si0.5合金的放电曲线有一个倾斜的平台,这表明少量的Mn和Si可以在一定程度上抑制LaNi3型贮氢合金的氢致非晶反应.
Effects ofFe,Mn and Si on the hydrogen-induced amorphization in LaNi3 were investigated by XRD and electrochemical method.All the LaNi2.5M0.5 (M =Ni,Fe,Mn and Si) alloys were prepared by melt-spun plus annealing method and their main phase is LaNi3.It is found that the hydrogen-induced amorphization appears in all the alloys for the first charging cycle.During the discharge process,no plateau is observed in LaNi3 and LaNi2.5Fe0.5 but a plateau in LaNi2.sMn0.5 and LaNi2.5Si0.5,indicating that a small amount of Mn and Si suppresses the tendency of hydrogen-induced amorphization.
参考文献
| [1] | Willems J J G et al.[J].Philips Journal of Research,1984,39(01):1. |
| [2] | Sakai T et al.[J].Journal of the Electrochemical Society,1990,137:795. |
| [3] | Shen Xiangqian;Chen Yungui;Tao Mingda;Wu Chaoling;Deng Gang .The influence of Cu(OH){sub}2 addition on the low-temperature electrochemical performance of La{sub}0.75Mg{sub}0.25Ni{sub}3.5 hydrogen storage alloy[J].Electrochimica Acta,2009(9):2581-2587. |
| [4] | Chen J et al.[J].Journal of Alloys and Compounds,2000,302(1-2):304. |
| [5] | Chen J et al.[J].Electrochem Solid SL,2000,3:249. |
| [6] | Maeland A et al.[J].Journal of the Less-Common Metals,1976,45:347. |
| [7] | Zhang Jing et al.[J].Journal of Power Sources,2007,172:446. |
| [8] | Kohno T et al.[J].Journal of Alloys and Compounds,2004,363:249. |
| [9] | Liao B et al.[J].Journal of Alloys and Compounds,2004,376:186. |
| [10] | Zhang Yanghuan et al.[J].Journal of Alloys and Compounds,2008,458:340. |
| [11] | Zhang Jing et al.[J].Acta Materialia,2008,56:5388. |
| [12] | Chung U I et al.[J].PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANIC,1991,63:1119. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%