测试分析了稀土系AB5型贮氢合金MmNi3.8Co0.4Mn0.6Al0.2Bx(x=0, 0.1, 0.2, 0.3, 0.4)的微观结构及电化学性能, 研究了硼含量x对贮氢合金电化学性能及微观结构的影响.结果表明, 铸态贮氢合金具有双相组织, 主相为CaCu5型相, 还有少量CeCo4B第二相, 第二相的相丰度随x的增加而增大.对合金进行了不同淬速的快淬处理, 合金中第二相的量随淬速的增加而减少.硼的加入使合金的电化学容量下降, 但活化性能及循环寿命明显提高.特别是对于快淬态合金, 硼对因促进非晶的形成而显著提高循环寿命.
参考文献
| [1] | B.R.Kielbik;W.Iwasieczko .Hydrogenation equilibria characteristics of LaNi_(5- x)Zn_x intermetallics[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):237-243. |
| [2] | Smith G;Goudy A J;Thermodynamics .kinetics and modeling studies of the LaNi5-xCox hydride system[J].Journal of Alloys and Compounds,2001,316:93-98. |
| [3] | Kodama T .The thermodynamic parameters for the LaNi5-xAlx-H2 and MmNi5-xAlx-H2 system[J].Journal of Alloys and Compounds,1999,289:207-212. |
| [4] | 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. |
| [5] | Bowman R C;Witham Jr C;Fultz B.Hydriding behavior of gas-atomized AB5 alloys[J].Journal of Alloys and Compounds,1997:253-254613-616. |
| [6] | 周煜;雷永泉;罗永春 等.气体雾化贮氢电极合金Ml(Ni, Co, Mn, Ti)5的活化性能[J].金属学报,1996,32(08):857-861. |
| [7] | ZHOU Yu;LEI Yong-quan;LUO Yong-chun et al.Activation of hydrogen-storage electrode alloy Ml(Ni, Co, Mn, Ti)5 produced by gas atomization[J].Acta Metallurgica Sinica,1996,32(08):857-861. |
| [8] | 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. |
| [9] | Liu F J;Suda S .Hydriding properties of the ternary Mm-based AB5 alloys modified by surface treatment[J].Journal of Alloys and Compounds,1996,232:204-211. |
| [10] | M.S-Wu;H.-R.Wu .Surface treatment for hydrogen storage alloy of nickel/metal hydride battery[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2000(1/2):248-257. |
| [11] | Chartouni D;Meli F;Zuttel A et al.The influence of cobalt on the electrochemical cycling stability of LaNi5-based hydride forming alloys[J].Journal of Alloys and Compounds,1996,241:160-166. |
| [12] | Li CJ.;Li XM.;Wang CY.;Wang XL. .The hydrogen storage properties of MmNi(3.8)Co(0.6)Mn(0.55)Ti(0.05) compounds prepared by conventional and melt-spinning techniques[J].Electrochimica Acta,1998(12/13):1839-1842. |
| [13] | Ye H;Zhang H;Wu W Q et al.Influence of the boron additive on the structure[J].Journal of Alloys and Compounds,2000,312:68-76. |
| [14] | Sakai T;Oguro K;Miyamura H et al.Some factors affecting the cycle lives of LaNi5 based alloy electrodes of hydrogen batterie[J].Journal of the Less-Common Metals,1990,161:193-202. |
| [15] | Mishima R;Miyamura H;Sakai T et al.Hydrogen storage alloys rapidly solidified by the melt-spinning method and their characteristics and metal hydride electrodes[J].Journal of Alloys and Compounds,1993,192:176-178. |
| [16] | Lei Y Q;Zhou Y;Luo Y C .Preparation and electrochemical properties of unidirectionally solidified Ml(NiCoMnTi)5 alloys[J].Journal of Alloys and Compounds,1997,253-254:590-593. |
| [17] | Li Y;Cheng Y T .Amorphous La-Ni thin film electrodes[J].Journal of Alloys and Compounds,1995,223:6-12. |
| [18] | 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. |
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%