Zr-Ti-V-Mn-Ni系贮氢合金的相结构与电化学性能研究  

Study on the microstructure and electrochemical properties of Zr-Ti-V-Mn-Ni hydride alloy

作　　者：文明芬[1] 翟玉春[1] 陈廉[2] 佟敏[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110006 [2]中国科学院金属研究所,辽宁沈阳110015

出　　处：《功能材料》2001年第4期379-381,共3页Journal of Functional Materials

基　　金：国家 8 63计划资助项目 71 5 0 0 4 0 2 33

摘　　要：优化合金组成 ,设计六种锆基AB2 型贮氢合金材料。XRD分析表明 ,当 0≤x≤ 0 .5时 ,Zr1-xTix(NiCoMnV) 2 .1贮氢合金的主相都是LavesC15 ,但随Ti含量的增加 ,LavesC14相含量增多 ;当用V Fe( 85 .6% )合金代替Zr0 .6 Ti0 .4(NiCoMnVFe Cr) 1.7中的V时 ,贮氢合金中LavesC14相的含量几乎可与LavesC15相当。电化学测试表明 :Zr0 .9Ti0 .1(NiCoMnV ) 2 .1贮氢电极的放电容量可达 34 0mAh/g左右 ,但是随着Ti含量的逐渐增加 ,合金电极的放电容量降低很快。以适量的 (V Fe)合金取代Zr0 .6 Ti0 .4(NiCoMnVFeCr) 1.7合金中的V和Fe ,发现合金电极的第一次放电容量就能达到 2 0 0mAh/g左右 ,并且其容量稍高于含纯V的合金电极 ,容量可达 315mAh/g左右。Six kinds of Zr based hydride alloy are designed in this paper. XRD analysis shows that the main phase of Zr 1- x Ti x (NiCoMnV) 2.1 alloy is Laves C15 when x is between 0 and 0.5,but the more the content of Ti, the more the Laves C14 phases increases; The amount of Laves C14 can be up to the amount of Laves C15 after substituted V and Fe by V Fe alloy in Zr 0.6 Ti 0.4 (NiCoMnVFeCr) 1.7 alloy. The electrochemical measurements show that the discharge capacity of Zr 0.9 Ti 0.1 (NiCoMnV) 2.1 electrode is about to 340mAh/g, but with increasing the amount of Ti, the discharge capacity of alloy electrode abruptly decreases. The discharge capacity of Zr 0.6 Ti 0.4 (NiCoMn(V Fe)Cr) 1.62 alloy electrode is about 200mAh/g at the first cycle, the maximum capacity is more than that of the electrode with pure V , and about 315mAh/g.

关 键 词：铅基贮氢合金 X射线衍射 LAVES相 放电容量 镍氢电池 相结构 

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]