稀土组元对储氢合金La(Ni3.5Co0.8Mn0.4Al0.3)电化学性能的影响  

EFFECT OF RARE-EARTH COMPONENT ON ELECTROCHEMICAL PROPERTY OF La(Ni3.5Co0.8Mn0.4Al0.3)BASED HYDROGEN STORAGE ALLOY

作　　者：贺维勇[1] 高国忠[1] 

机构地区：[1]中国科学院金属研究所

出　　处：《中国有色金属学报》1998年第1期24-27,共4页The Chinese Journal of Nonferrous Metals

基　　金：辽宁省科技基金

摘　　要：通过稀土族金属中铈、镨和钕部分替代ＡＢ５储氢合金中的镧，研究了稀土组元变化（共１３组成分变化）对合金电极电化学性能的影响。结果表明稀土组元含量变化明显影响合金电极的电化学性能。镨对保持储氢合金电极的高放电容量有利，当含０．２％（摩尔分数）时放电容量达２９０ｍＡ·ｈ／ｇ，铈则相反；随钕含量的增加，电池的放电容量也降低。The influences of rare earth Ce, Pr and Nd taking place of some La among AB5 hydrogen stroage alloy(13 samples) on the properties of electrochemistry were studied. The results showed that some change of rare earth component has a great effect on the electrochemical property of AB5based hydrogen storage alloy. The influence of Pr on the properties of electrochemistry of alloy electrode is smaller than that of Ce. Pr is useful for keeping the high discharge capacity of the hydrogen storage alloy electrode (The discharge capacity is 290 mAh/g when its content is 0.2% (mole fraction)), while Ce is harmful. The discharge capacity of hydrogen storage alloy electrode decreases with increasing content of Nd.

关 键 词：稀土 储氢合金 电极 放电容量 电极材料 

分 类 号：TG146.45[一般工业技术—材料科学与工程] TG139.7[金属学及工艺—金属材料]