为了研究热处理对AB5型快淬态储氢合金的组织结构及电化学性能的影响,在773K和973K分别对三种成分的快淬态储氢合金La1-xAx(Ni,Co,Sn)5进行了热处理,利用XRD与TEM技术分析了合金热处理前后的组织结构,利用充放电测试装置,研究了合金热处理前后的电化学性能.研究结果表明:热处理使合金内部晶格应力得以释放,恢复了扭曲的晶胞形状,使合金可以吸收更多的氢;热处理使晶粒得以细化,晶界比例相应增加,抗粉化能力增强.经过热处理后合金的容量及循环寿命均有所提高.
参考文献
| [1] | WILLEMS J J G .Metal Hydride Electrodes Stability of LaNi5-related compounds[J].Philips Journal of Research,1984,39(01):1. |
| [2] | MISHIMA R;MIYAMURA H;SAKAI T et al.Hydrogen storage alloys rapidly solidified by the melt-spinning methods and their characteristics as metal hydride electrode[J].Journal of Alloys and Compounds,1993,192:176. |
| [3] | STEVEN W;LAMBERT DHANDRA;WILLIAM N .Cathey.Investigation of hydriding properties of LaNi4.8Sn0.2,LaNi4.27 Sn0.24 and La0.9 Gd0.1 Ni5 after thermal cycling and aging[J].Journal of Alloys and Compounds,1992,187:113. |
| [4] | Kaminaka Hideya;Shida Yoshiaki;Koushiro Kouichi .Characteristics of Hydrogen Storage Alloy Powder Prepared by Ar gas Atomization Process[J].Materia Japan(in Japanese),1997,36(02):105. |
| [5] | 王静.稀土在功能材料中的应用与新进展[J].化学推进剂与高分子材料,2003(05):29-33. |
| [6] | ZTTEL A .Hydrogen storage methods and materials[J].Die Naturwissenschaften,2004,91:157-72. |
| [7] | C. Audry;P. Bernard;Y. Champion .Effect of the cooling rate of superstoichiometric AB_5 alloys with low Co content on their electrochemical performances[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2002(0):871-874. |
| [8] | SAKAI T;YOSHINAGA H;MIYAMURA H;KURIYAMA N, H Ishikawa .Rechargeable hydrogen batteries using rare-earth-based hydrogen storage alloys[J].Journal of Alloys and Compounds,1992,180:37. |
| [9] | SAKAI T;HAZAMA T;HIYAMURA H et al.Ishikawa.Rare-earth-based alloy electrodes for a nickel-metal hydride battery[J].Less Common Met,1991,172-174:1175. |
| [10] | 吴建民,杨素媛,李蓉,周少雄.退火对富铈Mm（NiCoMnAl）5储氢合金电化学性能的影响[J].中国稀土学报,2003(06):725-728. |
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%