Hai JING
,
Hong GUO
,
Shuguang ZHANG
,
Zili MA
,
Shaoming ZHANG
材料科学技术（英文）
The fine structure of hydrogen storage alloy powders MlNi4.3-xCoxMn0.4Al0.3(x=0.75, 0.45, 0.10; Ml: La-rich misch metal) prepared by rapidly solidifying gas atomization was investigated using a Rietveld analysis method. Two sets of CaCu5-type crystal constants were observed in the studied alloys and one set was larger than the other. With decreasing powder radius the solidification rate of powder increased, and so did the percentage of a particle part with larger crystal constants. The reason why there were two sets of crystal constants might be the difference of solidification rate between the outside and inside of a particle.
关键词:
Hydrogen storage alloys
,
null
,
null
,
null
黄建灵
,
邱树君
,
褚海亮
,
邹勇进
,
向翠丽
,
张焕芝
,
徐芬
,
孙立贤
材料科学与工程学报
doi:10.14136/j.cnki.issn 1673-2812.2016.03.019
首先采用化学还原法制备了CoZnB非晶合金,随后用机械球磨法将其引入到稀土基合金La0.7Mg0.3Ni3.5中制备成复合物,考察了CoZnB的添加量对La0.7Mg0.3Ni3.5合金电化学性能的影响.实验结果表明,加入CoZnB非晶合金后,复合物合金电极首次放电即可达到最大放电容量,高倍率放电性能得到了显著改善,电荷转移阻抗和极限电流密度均高于La0.7Mg0.3Ni3.合金电极.复合物合金电极La0.7Mg0.3Ni3.5-CoZnB(质量比1∶1)的最大放电容量高达487.5 mAh/g,800 mA/g放电电流密度下的复合物合金电极La0.7Mg0.3Ni3.5-CoZnB(质量比2∶1)的高倍率放电性能(HRD)可达94.8％.
关键词:
储氢合金
,
金属硼化物
,
放电容量
,
电化学性能
