物理化学学报 >> 1999, Vol. 15 >> Issue (05): 420-425.doi: 10.3866/PKU.WHXB19990507

研究论文 上一篇    下一篇

一种快速凝固AB2型储氢合金的球磨改性

邓庆洲, 陈德敏, 杨柯, 陈廉, 李滨慧, 张绥生, 刘实, 佟敏, 李依依   

  1. 辽宁省材料与氢重点实验室，中国科学院金属研究所，沈阳 110015|辽宁省交通高等专科学校，沈阳 110122
  • 收稿日期:1998-07-27 修回日期:1998-11-10 发布日期:1999-05-15
  • 通讯作者: 邓庆洲

Modification of a Rapidly Solidifide AB2 Type Hydrogen Storage Alloy by Ball-milling

Deng Qing-Zhou, Chen De-Min, Yang Ke, Chen Lian, Li Bin-Hui, Zheng Sui-Sheng, Liu Shi, Tong Min, Li Yi-Yi   

  1. Liaoning key Laboratory for Materials and Hydrogen,Institute of Metal Research,Chinese Acdemy of Sciences,Shenyang 110015|Liaoning Province Communications College,Shenyang 110122
  • Received:1998-07-27 Revised:1998-11-10 Published:1999-05-15
  • Contact: Deng Qing-Zhou

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摘要：

通过熔纺（melt-spinning）法制备了Zr0.9Ti0.1（Ni0.57V0.1Mn0.28C0.05）2.1合金，并与Co3Mo混合球磨以改善其动力学性能. 结果发现，经过球磨，储氢合金与作为催化剂的Co3Mo接触更加紧密，电化学容量和活化性能得到明显改善交流. 阻抗测试表明，球磨大大改善了合金的表面活性．但长时间的球磨可使合金进一步非晶化，导致容量及活性的下降．实验结果还表明，将快速凝固合金与具有电催化作用的Co3Mo球磨得到的电极材料，其活性要高于合金与只作为导体的铜粉进行球磨或在无添加剂条件下进行球磨得到的电极材料．

关键词: 金属-氢化物电极, 负极添加剂, 球磨处理

Abstract:

Zr0. 9Ti0. 1 (Ni0.57V0.1Mn0. 28Co0. 05 )2.1 alloy was prepared by melt-spinning and ball-milled with Co3Mo additive to improve its kinetic characteristics. It was shown that after 2 h milling the alloy exhibited a much improved activation performance as well as electrochemical capacity. Electrochemical impedance experiments also showed that ball-milling of the alloy with Co3Mo could improve the surface activity to a great extent. This can be attributed to the catalytic effect of Co3Mo, which had a much closer contact with the alloy powder after ball-milling, on hydrogen oxidation. However, long time milling could decrease the capacity gradually due to the further amorphization of the alloy. The experimental results also showed that the alloy ball-milled with electrochemically catalytic material such as Co3Mo exhibited a better activity than those milled without any additives or with a metal powder such as Cu acting only as a conductor.

Key words: Metal-hydride electrodes, Negative electrode additives, Ball-milling treatment