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

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

作　　者：项中毅[1] 韩选利[1] 樊星[1] 孙强强[1] 

机构地区：[1]西安建筑科技大学理学院化学系,陕西西安710055

出　　处：《电镀与涂饰》2012年第3期8-11,共4页Electroplating & Finishing

摘　　要：在LaMgNi3.7Co0.3储氢合金粉末表面进行化学镀镍处理。镀覆镍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Ni2+为40 g/L、温度为50°C、镀液pH为8.0、反应时间为30 min时,合金电极在6 mol/L KOH电解液中的最大放电容量和循环稳定性都有显著提高,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 nickel plating was carried out on the surface of LaMgNi3.7Co0.3 hydrogen storage alloy powder. The mixture of the nickel-coated alloy powder and nickel powder was coated on nickel foam to prepare an electrode. Under the conditions of Ni2＋ 40 g/L, temperature 50 ℃, pH 8.0, and time 30 min, the maximum discharge capacity and cyclic stability of the alloy electrode are greatly improved in an electrolyte containing 6 mol/L KOH. Moreover, the exchange current density is increased, the polarization resistance decreased, and the kinetic performance improved.

关 键 词：镧-镁-镍-钴合金 储氢 化学镀镍 电化学 

分 类 号：TQ153.12[化学工程—电化学工业]