化学镀铜对LaMgNi_(3.7)Co_(0.3)储氢合金电化学性能的影响  

Effect of electroless copper plating on electrochemical properties of LaMgNi_(3.7)Co_(0.3) hydrogen storage alloy

作　　者：朱彦平[1] 韩选利[1] 樊星[1] 

机构地区：[1]西安建筑科技大学化学系,陕西西安710055

出　　处：《电镀与涂饰》2011年第4期31-34,共4页Electroplating & Finishing

摘　　要：在LaMgNi3.7Co0.3储氢合金粉末表面进行化学镀铜处理。覆铜后的合金粉末与镍粉混合后涂于泡沫镍上制成电极。当镀液中Cu2+为1.2g/L,温度为30°C,pH为3.0,反应时间为2min时,合金电极在6mol/LKOH电解液中的最大放电容量和循环稳定性能都有显著提高,合金电极的交换电流密度增大,极化电阻降低,其动力学性能增强。Electroless copper plating was carried out on the surface of LaMgNi3.7Co0.3 hydrogen storage alloy powder.The mixture of the copper-coated alloy powder and nickel powder was coated on nickel foam to form an electrode.Under the conditions of Cu^2＋ 1.2 g/L,temperature 30 °C,pH 3.0 and time 2 min,the maximum discharge capacity and cyclic stability of the alloy electrode were greatly improved in an electrolyte of 6 mol/L KOH.Moreover,the exchange current density is increased,the polarization resistance decreased and the kinetic performance improved.

关 键 词：储氢合金 化学镀铜 电化学性能 

分 类 号：TQ153.14[化学工程—电化学工业]