锆基纳米复合储氢材料HTQAB_(2.1)/Mg的微结构与电化学性能  

The Microstructure and Electrochemical Performance of HTQAB_(2.1)/Mg Zr-Based Nanocomposite Hydrogen Storage Materials

作　　者：陈东[1] 马常祥[1] 陈廉[2] 陈德敏[2] 

机构地区：[1]东北大学理学院,辽宁沈阳110004 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《东北大学学报（自然科学版）》2003年第1期79-82,共4页Journal of Northeastern University(Natural Science)

基　　金：国家"八六三"高技术计划资助项目(715 004 0233);国家重点基础研究发展规划项目(G2000026403).

摘　　要：采用球磨复合+烧结处理(BMS)及机械复合+烧结处理(MMS)两种方法制备了Zr0.9Ti0.1(Ni0.57V0.10Mn0.28Co0.05)2.1 X%Mg(X=10,20)锆基纳米复合储氢材料·经XRD、TEM SAED分析表明,BMS和MMS的复合储氢材料皆由MgCu2型立方结构的单一C15 Laves相Zr基合金和密排六方结构的Mg金属构成,未发现两者之间的合金化效应·电化学测试表明,在60mA/g电流密度下,复合材料(MMS、BMS)活化性能好·MMS电极的最大放电容量为410mAh/g(X=20),而BMS的放电容量为360mAh/g(X=20)·在大电流密度下(≥3000mA/g),BMS电极的容量明显高于MMS电极,以BMS(HTQAB2 1 10%Mg)电极的大电流放电性能为最好·因此,HTQAB2 1锆基纳米复合材料不仅适用于高能量型NiMH动力电池而且更适用于高功率型NiMH动力电池·The Zrbased nanocomposite hydrogen storage materials Zr09Ti01(Ni055V012Mn028Co005)21X%Mg(X=10,20) were prepared by two ways: ballmilling+sintering treatment (BMS) and mechanical alloying+sintering treatment(MMS). XRD and TEMSAED examinations show that microstructure of the materials is composed of MgCu5type cubic structure C15Laves phase and hexagonal structure Mg. Their electrochemical performance tests show that the composite electrodes (MMS,BMS) have good activation properties at 60?mA/g current density. The maximum discharge capacity of MMS electrodes is 410?mAh/g(x=20),while BMS electrodes is 360?mAh/g(x=20). At high current density(≥3?000?mA/g),the discharge capacity of BMS electrodes is obviously higher than those of the MMS eletrodes. The BMS(HTQAB2110%Mg) electrode shows the best current density discharge performance. Therefore,HTQAB2.1 type Zrbased nanocomposite materials are suitable for not only highenergy NiMH batteries but also highpower NiMH batteries.

关 键 词：储氢材料 锆基纳米复合材料 HTQAB2.1/Mg 球磨复合 烧结处理 微结构 电化学性能 电动汽车 动力电池 蓄电池 

分 类 号：TB33[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]