【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·更多还原

【Abstract】 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.更多还原