采用熔铸方法制备母合金Zr0.9Ti0.1(Ni， Co， Mn， V)2.1， 进而在母合金基础上添加吸氢剂B， 利用球磨制得4种复合贮氢合金。 X射线衍射结果表明， 随着球磨时间的增加， 复合合金由晶态转化为非晶态； 电化学测试结果表明， 复合合金经过1～2次球磨就能完全活化， 具有很好的活化性能； 在60 mA/g电流下， 复合贮氢合金C和D的稳定容量均可达到440 mA.h/g左右， 比母合金高出80 mA.h/g； 但随着球磨时间的延长， 所得的复合合金容量比铸态母合金的还低； 在300 mA/g电流下， 复合合金D具有较好的循环稳定性， 经过200次循环后其容量仅衰减3%。
Zr0.9Ti0.1(Ni， Co， Mn， V)2.1 as-cast alloy was prepared by melting under an argon atmosphere; and then， four composite alloy were prepared by ball-milling after adding hydrogen storage agent B. XRD results show that composite alloys become micro-crystalline or amorphous from crystalline with ball-milling time increasing; the electrochemical results indicate that composite alloys have a good active behavior， which can be active completely with one or two cycles. At 60 mA/g current mass density， the stability capacities of C and D composite alloys could be up to 440 mA*h/g， which are 80 mA*h/g more than that of as-cast alloy; at 300 mA/g current mass density， the cycle stability of composite alloy D is worse than those of as-cast alloy and LaNi5 hydrogen storage.
参考文献
| [1] | Cracco D.;Percheron-Guegan A. .Morphology and hydrogen absorption properties of an AB(2) type alloy ball milled with Mg2Ni[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):248-255. |
| [2] | Yan D Y;Sandroch G;Suda S .Surface Modification of Zr0.5Ti0.5V0.75Ni1.25 Alloy Electrode in 6 mol/L KOH[J].Journal of Alloys and Compounds,1994,216:237-242. |
| [3] | Ikoma M.;Yuasa K.;Kaida S.;Matsumoto I.;Iwakura C.;Yuasa S. .Charge characteristics of sealed-type nickel/metal-hydride battery[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):252-256. |
| [4] | GAO X P;Zhang W;Yang H B et al.Electrochemical properties of the Zr(V0.4Ni0.6)2.4 hydrogen storage alloy electrode[J].Journal of Alloys and Compounds,1996,235:225-231. |
| [5] | GAO X P;Song D Y;Zhang Y S et al.Effects of pretreatment on the activation behavior of Zr(V0.25Ni0.75)2 metal hydride electrodes in alkaline solution[J].Journal of Alloys and Compounds,1995,229:268. |
| [6] | IWAKURA C;Kim I;Matsue N et al.Surface modification of laves-phase ZrV0.5Mn0.5Ni alloy electrodes with alkaline solution containing potassium borohydride[J].Electrochimica Acta,1995,40:561. |
| [7] | JUNG J H;Lee H H;Kim D M et al.New activation process for Zr-Ti-Cr-Mn-V-Ni alloy electrodes:the hot-charging treatment[J].Journal of Alloys and Compounds,1997,253-254:652-655. |
| [8] | Liu B H;Jung J H;Lee H H et al.Improved electrochemical performance of AB2-type metal hydride electrodes activated by the hot-charging process[J].Journal of Alloys and Compounds,1996,245:132-141. |
| [9] | Benjamin J S .Mechanical alloying[J].Scientific American,1995,234:40. |
| [10] | Bobet J L;Even C;Nakamura Y et al.Synthesis of magnesium and titanium hydride via reactive mechanical alloying[J].Journal of Alloys and Compounds,2000,298:279-284. |
| [11] | 朱文辉,朱敏,高岩,车晓舟,李祖鑫.机械合金化Mg/MmNi5-x（CoAlMn）x复合储氢合金的组织结构与吸氢特性[J].中国稀土学报,1999(04):313-317. |
| [12] | Zuttel A.;Nutzenadel C.;Gross K.;Schlapbach L.;Chartouni D. .Bulk and surface properties of crystalline and amorphous Zr-36(V0.33Ni0.66)(64) alloy as active electrode material[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,1998(1/2):321-326. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%