物理化学学报 >> 2003, Vol. 19 >> Issue (12): 1167-1170.doi: 10.3866/PKU.WHXB20031216

研究简报 上一篇    下一篇

储氢合金电极的表面修饰研究

杨凯;吴锋;李丽;王敬   

  1. 北京理工大学化工与环境学院,国家高技术绿色材料发展中心,北京 100081
  • 收稿日期:2003-05-16 修回日期:2003-08-07 发布日期:2003-12-15
  • 通讯作者: 吴锋 E-mail:wufeng863@vip.sina.com

Research on the Surface Modification of the Metal-Hydride Electrode

Yang Kai;Wu Feng;Li Li;Wang Jing   

  1. School of Chemical Engineering and Environment, Beijing Institute of Technology, National Development Center of Hi-Tech Green Materials, Beijing 100081
  • Received:2003-05-16 Revised:2003-08-07 Published:2003-12-15
  • Contact: Wu Feng E-mail:wufeng863@vip.sina.com

摘要: 利用等离子体技术对AA型MH/Ni电池的储氢合金电极进行了镀覆导电膜层的表面修饰,用XRD及SEM对电极结构进行了表征.极片经过表面修饰的电池,其内阻降低了24%,放电容量有了明显提高,5C (7.5 A) 放电容量提高了200 mA•h,放电平台电压提高了约0.14 V,导电膜层还起到了电极保护层的作用,抑制了合金的粉化,提高了电池的循环稳定性.同时,电池内压显著降低,电池性能有了较大改善.

关键词: MH/Ni电池, 等离子体技术, 表面修饰, 电极

Abstract: The metal-hydride electrode of MH/Ni batteries was modified with a thin conductive film using plasma technology. The experimental results demonstrated that the resistance of the batteries with the modified electrode was decreased by 24%,the discharge capacity was remarkably increased, discharge capacity at 5C (7.5 A) was increased by 200 mA•h and discharge voltage was increased by 0.14 V, the conductive film also restrained the pulverization of the hydrogen storage alloy and the battery with modified electrode exhibited satisfactory durability, the inner pressure of batteries was also decreased . The performance of the batteries showed an obvious improvement.

Key words: MH/Ni batteries, Plasma technology, Surface modification, Electrode