研究了铸态及经加热温度为1273～1373K、保温时间8 h和水冷处理后AB5型MlNi 3.60Co 0.85Mn0.40Al0.15贮氢电极合金的微结构和电化学性能.结果表明:铸态合金的显微组织为典型的树枝晶结构,经1273 K处理后合金的显微组织仍为树枝晶,但树枝结构不明显,经1 373 K处理后合金的显微组织为柱状晶;与铸态合金相比,经1 273 K处理后合金的活化性能降低,电化学容量和高倍率放电性能基本保持不变,循环寿命改善;经1 373 K处理的合金活化性能降低,电化学容量明显减小,高倍率放电性能降低,循环寿命显著改善.热处理引起合金电化学性能的变化与合金的微结构的改变有关.
参考文献
| [1] | Willems J J .Metal hydride electrodes stability of LaNi5related compounds[J].Philips Journal of Research,1984,39(01) |
| [2] | Sakai T;Yoshinaga H;Miyamura H et al.Rechargeable hydrogen batteries using rare-earth-based hydrogen storage alloys[J].Journal of Alloys and Compounds,1992,37:180. |
| [3] | Pan H;Ma J;Wang C et al.Effect of Co content on the kinetic properties of the MlNi4 3-xCoxAl0 7 hydride electrodes[J].Electrochimica Acta,1999,44:3977. |
| [4] | Pan H G;Ma J X;Wang C S et al.Study on theelectrochemical properties of MmNi4 3- xCoxAI0 7 hydride alloys[J].Journal of Alloys and Compounds,1999,293-295:648. |
| [5] | Natten P H L;Latrode M;Percheron-Guegan A .The influence of Mn on the crystallography and electrochemistry of nonstoichiometric AB5-type hydride-forming compounds[J].Journal of the Electrochemical Society,1999,146:3181. |
| [6] | GENG Ming-ming .Electrode characterization of MmNi5based alloys for nickel-metal hydride batteries[J].Journal of Alloys and Compounds,1994,206:L3. |
| [7] | Wu Mao-sung;Wu Hong-rong;Wang Yung-yun et al.Surface treatment for hydrogen storage alloy of nickel/metal hydride battery[J].Journal of Alloys and Compounds,2000,302:248. |
| [8] | Pan H;Chen Y;Wang C et al.Effect of alloys modified by an alkaline solution containing potassium borohydride on the kinetic properties of MlNi3 7Co0 6Mn0 4Al0 3 hydride electrode[J].Electrochimica Acta,1999,44:2263. |
| [9] | Imoto T;Kato K;Higashiyama N et al.Influence of surface treatment by HCl aqueous solution on electrochemical characteristics of an Mm [Ni-Co-Al-Mn[J].Journal of Alloys and Compounds,1999,282:274. |
| [10] | Chen Weixiang,Qi Jianqin,Chen Changpin.Effects of Ca-substitution and surface treatment on electrochemical performances of Ml1.0- xCax Ni4.0Co0.6Al0.4 hydrogen storage alloy electrodes[J].中国有色金属学会会刊（英文版）,1999(03):487-492. |
| [11] | Nakamura H;Nakamura Y;FujitaniS et al.Influence of annealing on hydrogenation characteristics and microstructure of LaNi4 55Al0 45 alloy[J].Journal of Alloys and Compounds,1995,218:216. |
| [12] | Hu Wei-kang;Kim Dong-Myumg;Jeon Seok-Won et al.Effect of annealing treatment on electrochemical properties of Mm-based hydrogen storage alloys for Ni/ MH batteries[J].Journal of Alloys and Compounds,1998,270:255. |
| [13] | Chartouni D et al.Influence of the alloy morphology on the kinetics of AB5-type metal hydride electrodes[J].Journal of Alloys and Compounds,1999,285:292. |
| [14] | Li C;Wang X .Investigations on the cycle stability and the structure of the MmNi3 6 Co0 75 Mn0 55 Al0 15 hydrogen storage alloy[J].Journal of Alloys and Compounds,1999,284:270. |
| [15] | Shlapboch L.Hydrogen in Intermetallic Compounds, Topics in Appl Phys[M].Springer,Berlin,1992:15. |
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%