制备方法对LaMg11Zr+200%Ni储氢合金电化学性能的
影响
刘子利;闫新春;刘希琴
【期刊名称】《南京航空航天大学学报》 【年(卷),期】2011(043)006
【摘要】LaMgnZr+200%Ni hydrogen storage alloys are prepared by means of mechanical alloying and melting-mechanical alloying methods respectively, and the structure and the electrochemical properties of LaMgnZr+200%Ni alloys are studied. The results indicate that the alloys prepared by mechanical alloying method are nearly amorphous after 20 h ball-milling, and have a weak diffraction peak of LaMg. The grain size of the alloys particles is about 2-5 ^m, and the particles of alloys have slightly clustering phenomenon. The alloys prepared by melting-mechanical alloying method are completely amorphous after 20 h ball-milling, and the particles are more uniform with spherical or near-spherical shape. The maximum discharge capacities of the alloys prepared by melting-mechanical alloying method are smaller than that of the alloys prepared by mechanical alloying method, but the cyclic stability and the high rate discharge (HRD) are better.%分别采用机械合金化和熔炼-机械合金化制备了LaMg11Zr+200%Ni储氢合金,研究了合金结构和电化学性能.结果表明,由机械合金化制备的合金经球磨20h后近于非晶化,但还存在一个微弱的LaMg衍射峰,合金颗粒的粒度为2~5μm,且有轻微的团聚
现象.熔炼-机械合金化制备的合金球磨20h后达到完全非晶化,合金颗粒大小更为均匀,呈规则的球状或近球状形态.熔炼-机械合金化制备的合金的最大放电容量比机械合金化制备的合金小,但循环稳定性和高倍放电性能好. 【总页数】5页(827-831)
【关键词】LaMg11Zr+200%Ni合金;制备方法;性能 【作者】刘子利;闫新春;刘希琴
【作者单位】南京航空航天大学材料科学与技术学院,南京,211106;南京航空航天大学材料科学与技术学院,南京,211106;南京航空航天大学材料科学与技术学院,南京,211106 【正文语种】中文
【中图分类】TM911;O646 【文献来源】
https://www.zhangqiaokeyan.com/academic-journal-cn_journal-nanjing-university-aeronautics-astronautics_thesis/0201210087298.html 【相关文献】
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制备方法对LaMg11Zr+200%Ni储氢合金电化学性能的影响
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