稀土学报（英文版）
稀土學報（英文版）
희토학보（영문판）
JOURNAL OF RARE EARTHS
2014年
6期
526-531
,共6页
姚青荣%唐莹%周怀营%邓健秋%王仲民%潘顺康%饶光辉%朱其明
姚青榮%唐瑩%週懷營%鄧健鞦%王仲民%潘順康%饒光輝%硃其明
요청영%당형%주부영%산건추%왕중민%반순강%요광휘%주기명
hydrogen storage alloy%electrochemical properties%rapid solidification%quenching rate%rare earths
The effect of rapid solidification on structure and electrochemical performance of the LaNi4.5Co0.25Al0.25 hydrogen storage alloy was investigated by X-ray powder diffraction and a simulated battery test, including maximum capacity, cycling stability, self-discharge, and high-rate discharge ability (HRD). All the melt-spun alloys were single-phase with the CaCu5-type structure (space groupP6/mmm). In comparison to the as-cast alloy, the rapidly quenched alloys manifested an improved homogeneity of com-position and expanded lattice parameters. The electrochemical measurements showed that the activation property, cycling stability and self-discharge of the alloy electrodes were also improved for the rapid solidified alloys. The HRDof the as-cast alloy was better than those of all the rapidly solidified alloys. As the quenching rate increased, the HRD and exchange current density first decreased and then increased.
