摘要
将Zr0.9Ti0.1V0.2Mn0.6Co0.1Ni1.1合金与20%Mg50Ni50非晶球磨,制备AB2-Mg50Ni50复合贮氢合金。采用XRD物相分析、扫描电镜、EDS分析及电化学性能测试,研究球磨时间对AB2-Mg50Ni50复合贮氢材料的结构和电化学吸放氢性能的影响。结果表明,随复合球磨时间增加,复合合金电极放电性能有所提高。经24h球磨的复合材料在常温250mA/g充电3h,50mA/g放电至1.0V的充放电制度下,经过6次循环,放电容量达到435mAh/g。由于AB2与Mg50Ni50非晶合金组元材料之间可能产生的协同耦合作用,使得复合材料Zr0.9Ti0.1V0.2Mn0.6Co0.1Ni1.1-Mg50Ni50出现复合诱导效应,从而改善了AB2合金电极的放电性能。
The composite hydrogen storage alloy are prepared by ball-milling of Zr0.9Ti0.1V0.2Mn0.6Co0.1Ni1.1 with 20 % Mg50Ni50 amorphous alloy. The effects of ball-milling time on the microstructure and the electrodes characteristics are investigated by XRD, SEM, EDS analysis and electrode test method. The results show that the discharge capacity of the composite hydrogen storage alloy is improved with the increase of the milling time. The maximum discharge capacity 435mAh/g of the composite hydrogen storage alloy prepared by milling 24h is achieved by 6 activation cycles under the condition of charging at 250mA/g for 3h in ambient temperature and discharging to 1.0V at 50mA/g. The activity property and the discharge characteristics of the AB2 alloy electrode are improved by the abduction domino effect of the Zr0.9Ti0.1V0.2Mn0.6Co0.1Ni1.1-Mg50Ni50 composite resulted from the coupling cooperation function of the AB2 alloy and the Mg50Ni50 amorphous alloy.
出处
《有色金属》
CSCD
北大核心
2008年第4期48-51,共4页
Nonferrous Metals
基金
上海市科委纳米科技专项项目(0452NM002)
