| 高功率Ni/MH电池用AB5 型负极储氢合金的研究（英文） |
| |
| 作者姓名： | 叶辉 张宏 |
| |
| 作者单位： | 中国科学院上海微系统与信息技术研究所, 上海 200050 |
| |
| 摘 要： | 研究和开发具有优异高倍率特性的储氢电极合金是发展高功率型Ni/MH电池的技术关键,具有重大的理论意义和商业价值。基于合金热力学和动力学行为的讨论,研究了AB5型储氢电极合金的微结构对其倍率放电性能的影响。结果表明,由于非化学计量(B/A >5 )和高催化活性第二相的引入,B侧添加硼或钼可以显著提高合金的高倍率放电容量和低温放电容量。进一步结合A侧稀土成分优化,发展出一类具有优异倍率性能的MmNi3.55Co0.75Mn0.4Al0.3Bx(Mm为混合稀土)合金。该系列合金有望应用于高功率Ni/MH电池和低温(-35℃)Ni/MH电池。
|
| 关 键 词： | AB5型储氢合金 高倍率放电性能 低温放电性能 微结构 高功率Ni/MH电池 |
| 收稿时间： | 2002-12-31 |
Study on AB5-Type Hydrogen Storage Alloys for High-Power Nickel-Metal Hydride Batteries |
| |
| Authors: | YE Hui ZHANG Hong |
| |
| Institution: | Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China |
| |
| Abstract: | Developing hydrogen storage alloys with high-rate dischareability is the key to extend the application of nickel/metal-hydride (Ni/MH)batteries to high-power fields.Based on the discussion of the thermodynamic and kinetic behaviors, the influence of the microstructure on discharge rate behavior of AB-type hydrogen storage alloys has been investigated.The results show that the addition of B and Mo can significantly improve the discharge capability at high-rate and also at low temperature due to the introduction of the non-stoichiometry with B/A >5 and secondary phase with catalytic activity.Again combined with the optimization of the rare earth composition in A side, a kind of MmNi3.55Co0.75Mn0.4Al0.3Bx alloy (Mm:mischmetal)with excellent rate characteristics has been developed.This kind of alloy is promising for Ni/MH batteries in both high power and low temperature applications. |
| |
| Keywords: | AB5-type hydrogen storage alloy high-rate discharge capability low temperature performance microstructure high-power Ni/MH battery |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
