快淬Zr_(0.9)Ti_(0.1)(Ni,Co,Mn,V)_(2.1)贮氢合金的结构与性能  

Structure and Electrochemical Properties of Melt-spinning Zr_(0.9)Ti_(0.1)(Ni,Co,Mn,V)_(2.1) Alloy

作　　者：文明芬[1,2] 翟玉春[1] 陈廉[3] 佟敏[3] 陈德敏[3] 郑华[1,2] 马荣俊[4] 

机构地区：[1]东北大学材料与冶金学院 [2]中国科学院金属研究所,辽宁沈阳110015 [3]中国科学院金属研究所 [4]长沙矿冶研究院

出　　处：《过程工程学报》2001年第4期408-411,共4页The Chinese Journal of Process Engineering

基　　金：国家863计划资助项目(编号: 715-004-0233)

摘　　要：对比了熔体快淬合金和常规熔铸合金Zr0.9Ti01(Ni,Co,Mn,V)21的微结构和电化学性能.XRD分析表明:熔体快淬合金在退火前后的晶体结构与铸态合金一样,都为面心立方结构,由Laves C15主相组成;随快淬速度的增加,快淬合金中的非晶成份增多.电化学测试表明:快淬合金有较好的活化性能,经6～8次循环即可完全活化,但其最大放电容量较低,小于270 mA.h/g;而退火后的快淬合金需经30次循环才能完全活化,其最大放电容量皆为340 mA@h/g左右,高于铸态合金和退火前的快淬合金;在电流密度为300 mA/g下充放电循环,发现退火后的快淬合金循环稳定性明显高于铸态合金电极,并且随快淬速度增加,循环稳定性越好.The structure and electrochemical properties of Zr0.9Ti0.1(Ni,Co,Mn,V)2.1 alloys prepared by both the melt-spinning method and the conventional induction melting were investigated. XRD studies showed that Zr0.9Ti0.1(Ni,Co,Mn,V)2.1 alloys at as-cast, melt-spinning and annealing were all the face center cubic structure with Laves C15 phase, and the higher the melt-spinning rate, the more the amorphous content. The electrochemical measurements showed that melt-spinning alloys had better activity, low discharge capacity (<270 mAh/g); but after annealed, the alloys are activated completely with 30 cycles, the capacities about 340 mAh/g were higher than those of the as-cast and melt-spinning alloys; the annealed alloys had better cycle stability than that of the as-cast alloy, and the higher the melt-spinning rate, the more stable the alloy became.

关 键 词：XRD 熔体快淬 循环稳定性 贮氢合金 镍氢电池 

分 类 号：TM912.1[电气工程—电力电子与电力传动] TG139.7[一般工业技术—材料科学与工程]