摘要
对LaxCe0 .9-x(PrNd) 0 .1 (Ni3 .5 5 Co0 .75 Mn0 .4Al0 .3)合金 (x =0 .4~ 0 .9)在不同温度下( 2 98K~ 333K)的电化学性能进行了系统的研究 .结果表明 ,随着温度由 2 98K升高到 333K ,合金的活化性能得到改善 ;合金的最大放电容量增大 ,并在 313K时达到最大值 (平均提高了 2 2 .9mAh/g) ,而当温度提高到 3 33K时 ,各合金的最大放电容量又大幅度下降 (平均降低了 83 .9mAh/g) ;随着温度的升高 ,合金的高倍率放电性能得到改善 ,但合金的循环稳定性明显降低 (在 1C充放电电流下经2 2 0次充放电循环后的容量保持率平均降低了 4 0 %以上 ) .
The electrochemical performances of La xCe 0.9-x (PrNd) 0.1 (Ni 3.55 Co 0.75 Mn 0.4 Al 0.3 )(x=0.4~0.9)alloys on 298K~333K are systematically studied.The results show that the increase of temperature results in the improvement of activation property of alloys.The C max of alloys reaches the extreme value at 313K (with an average increayse of 22.9mAh/g ) but decreases markedly at 333K (with an average decrease of 83.9mAh/g).With the temperature increasing,the HRD of alloys increases but the cycle stability decreases evidently (the capacity retention of alloys after 220 charge discharge cycles decreases up 40% on average).\;
出处
《鞍山师范学院学报》
2000年第3期17-21,共5页
Journal of Anshan Normal University
基金
国家"8 63"计划资助项目 !( 715 0 0 4 0 0 60 )