感应熔炼法制备了(La0.78 Mg0.22)(Ni(0.9-x)Co0.1Mnx)3.5(x=0.00,0.01,0.03,0.05,0.07)合金,并在氩气气氛下,以1173 K温度退火处理.XRD相结构分析表明,合金具有多相结构,随着Mn含量的不同分别含有:La2Ni7相、LaNi5相和LaNi3相.P-C-T性能测试表明,合金在3 MPa压力和298 K温度下的吸氢量高达1.6 wt.%.电化学测试表明,合金放电容量随着Mn含量的增大而减小,由X=0时的394.2 mAh/g下降到x=0.07时的363.3 mAh/g,充放电循环性能是先下降,后上升,再下降.合金的倍率性能随着Mn含量的增加先上升,后下降,然后又上升.当放电电流密度为3 000 mA/g时,高倍率性能由x=0时的201.6 mAh/g变为X=0.07时的182.9 mAh/g.研究表明当x=0.03时合金具有比较好的综合性能.
参考文献
| [1] | Kohno T;Yamamoto M;Kanda M .Electrochemical properties of mechanically ground Mg2Ni alloy[J].Journal of Alloys and Compounds,1999,293:643. |
| [2] | 张法亮,罗永春,孙凯,康龙,陈剑虹.La1.5Mg0.5Ni7-xCox（x=0～1.8）贮氢合金结构和电化学性能研究[J].功能材料,2006(02):265-269. |
| [3] | Kono Ryuko;Sakai Isao;Yamamoto Masaaki et al.Hydrogen storage alloy and secondary battery[P].JP.11323469 |
| [4] | Kawashima Fumiyuki;Sakamoto Toshiya;Arai Tomohisa .Hydrogen storage alloy and nickel-hydrogen secondary battery using the same[P].JP,2002105563 |
| [5] | Faliang Zhang;Yongchun Luo;Kai Sun .Effect of Co content on the structure and electrochemical properties of La_(1.5)Mg_(0.5)Ni_(7-x)Co_x (x = 0. 1.2. 1.8) hydrogen storage alloys[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2006(1/2):218-224. |
| [6] | Yongfeng Liu;Honge Pan;Mingxia Gao .Effect of Co content on the structural and electrochemical properties of the La_(0.7)Mg_(0.3)Ni_(3.4-x)Mn_(0.1)Co_x hydride alloys. I. The structure and hydrogen storage[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):296-303. |
| [7] | Yongfeng Liu;Hognge Pan;Mingxia Gao .Effect of Co content on the structural and electrochemical properties of the La_(0.7)Mg_(0.3)Ni_(3.4-x)Mn_(0.1)Co_x hydride alloys. II. Electrochemical properties[J].Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics,2004(1/2):304-313. |
| [8] | Yongfeng Liu;Hongge Pan;Mingxia Gao;Yunfeng Zhu;Yongquan Lei;Qidong Wang .The effect of Mn substitution for Ni on the structural and electrochemical properties of La_(0.7)Mg_(0.3)Ni_(2.55-x)Co_(0.45)Mn_x hydrogen storage electrode alloys[J].International journal of hydrogen energy,2004(3):297-305. |
| [9] | Yongfeng Liu;Hongge Pan;Yunfeng Zhu .Influence of Mn content on the structural and electrochemical properties of the La_(0.7)Mg_(0.3)Ni_(4.25-x)Co_(0.75)Mn_x hydrogen storage alloys[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2004(1/2):163-172. |
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%