改性活性炭/AB_5合金复合材料的电化学储氢性能  

Study on electrochemical hydrogen absorbing performance of modified activated carbon/AB_5 alloy composite

作　　者：李晓峰[1] 尚青[1] 董会超[1] 夏同驰[1] 宋延华[1] 

机构地区：[1]郑州轻工业学院材料与化工学院河南省表界面重点实验室,河南郑州450002

出　　处：《电源技术》2015年第3期494-497,共4页Chinese Journal of Power Sources

基　　金：河南省高等学校青年骨干教师资助计划(2011GGJS-101)

摘　　要：分别采用球磨法、液相还原法和水热法在活性炭(AC)中引入金属镍,将改性后的活性炭与AB5型储氢合金组成复合材料。恒电流充放电测试表明,水热法改性活性炭/AB5合金(质量分数90%)制成的复合材料表现出最佳的电化学储氢性能,当改性活性炭含20%金属镍时,复合电极的0.2 C比容量达到316 m Ah/g,且大电流放电性能明显优于AB5合金电极。Activated carbon（AC） was modified with metal nickel by using a simple ball milling method, liquid reduction method and hydrothermal process. Then the modified AC was mixed with AB5 alloy to form a composite material. The results of galvanostatic charge-discharge tests indicate that the material which composed of 10% AC modified by hydrothermal method and 90% AB5 alloy show the optimal electrochemical hydrogen absorbing performance. When the modified AC contained 20% nickel, the discharge capacity of the composite electrode was at 0.2 C reached 316 m Ah/g and its high power performance was obviously exceeded the AB5 alloy electrode.

关 键 词：活性炭 AB5合金 水热法 复合材料 电化学储氢 

分 类 号：TM91[电气工程—电力电子与电力传动]