作　　者： ; ; ; ; ;

机构地区： 四川大学

出　　处： 《稀有金属材料与工程》 2013年第5期905-908,共4页

摘　　要： 研究了在6mol/LKOH电解液中添加不同浓度KF对商用AB5-型贮氢合金的电化学性能的影响,研究发现合金的循环性能和循环后期的高倍率性能提高,通过XRD,SEM,SEI等分析表明,在电解液中添加KF生成的LaF3能显著提高合金耐腐蚀的能力,同时阻止合金电极在循环过程中析氢过电位降低,提高合金的动力学性能。 The influence of the added KF concentration in the 6 mol/L KOH electrolyte on the electrochemical performances of the commercial AB5-type hydrogen storage alloy was investigated. The cycle life and high-rate performance of the commercial AB5-type hydrogen storage alloy can be improved by adding KF to the electrolyte. The analyses of XRD, SEM and SEI show that the formation of LaF3 in KF-added electrode can obviously decrease the corrosion of the metal hydride electrode compared with that of the KF-free electrode which prevents the dropping of the hydrogen evolution reaction voltage of the electrode and results in the improvement of electrochemical dynamics of the electrode.

关 键 词： 金属氢化物电极 循环性能 高倍率性能

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]