储氢合金电极的表面修饰研究  

Research on the Surface Modification of the Metal Hydride Electrode

作　　者：杨凯[1] 吴锋[1] 李丽[1] 王敬[1] 

机构地区：[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

出　　处：《物理化学学报》2003年第12期1167-1170,共4页Acta Physico-Chimica Sinica

基　　金：国家重点基础研究发展规划项目资助(2002CB211800)~~

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(7.5A)放电容量提高了200mA·h,放电平台电压提高了约0.14V,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.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 5 C (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.

关 键 词：储氢合金电极 表面修饰 等离子技术 MH/NI电池 电极结构 电化学性能 

分 类 号：TG139.7[一般工业技术—材料科学与工程]