Preparation and electrochemical properties of   La0.70MgxNi2.45Co0.75Al0.30 (x=0, 0.30, 0.33, 0.36, 0.39) hydrogen   storage alloys

doi:10.1016/j.jallcom.2016.02.167

CORC > 北京大学 > 化学与分子工程学院

	Preparation and electrochemical properties of La0.70MgxNi2.45Co0.75Al0.30 (x=0, 0.30, 0.33, 0.36, 0.39) hydrogen storage alloys
	Tian, Xiao ; Wei, Wei ; Duan, Ruxia ; Zheng, Xinyao ; Zhang, Huaiwei ; Tegus, O. ; Li, Xingguo
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2016
关键词	Hydrogen storage La-Mg-Ni-based alloy Phase structure Electrochemical property NI SYSTEM ALLOYS NEGATIVE ELECTRODE NI/MH BATTERIES PHASE-STRUCTURE MG LA SUBSTITUTION STABILITY NANOCRYSTALLINE MICROSTRUCTURE
DOI	10.1016/j.jallcom.2016.02.167
英文摘要	The as-cast alloy with the composition of La0.70Ni2.45Co0.75Al0.30 was prepared by vacuum arc melting. La-Mg-Ni-based La0.70MgxNi2.45Co0.75Al0.30 hydrogen storage alloy has been synthesized by high-energy vibratory milling blending of the La0.70Ni2.45Co0.75Al0.30 as-cast alloy and elemental Mg, followed by an isothermal annealing. The microstructures and electrochemical properties of the La0.70Ni2.45Co0.75Al0.30 and La0.70MgxNi2.45Co0.75Al0.30 alloys were investigated by XRD, SEM and electrochemical measurements. The XRD analysis and Rietveld refinement showed that the as-cast La0.70Ni2.45Co0.75Al0.30 alloy consists of single LaNi5 phase, whereas the La0.70MgxNi2.45Co0.75Al0.30 alloys contain the LaNi5 and (La, Mg)(2)Ni-7. The electrochemical measurements indicated that the maximum discharge capacity and discharge potential characteristic of the La0.70MgxNi2.45Co0.75Al0.30 alloys increases first and then decreases with increasing x. The maximum discharge capacity and discharge potential characteristic of alloy reaches the optimum when x is 0.36. The cyclic stability of the La0.70MgxNi2.45Co0.75Al0.30 alloy with a smaller quantity of Mg is better than that of the alloy with a larger quantity of Mg. (C) 2016 Elsevier B.V. All rights reserved.; Natural Science Foundation of Inner Mongolia Autonomous Region [2014MS0542]; Talent Development Foundation of Inner Mongolia Autonomous Region; MOST of China [2012CBA01207]; NSFC [51431001]; SCI(E); ARTICLE; nsdtx@126.com; xgli@pku.edu.cn; 104-109; 672
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/438091]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Tian, Xiao,Wei, Wei,Duan, Ruxia,et al. Preparation and electrochemical properties of La0.70MgxNi2.45Co0.75Al0.30 (x=0, 0.30, 0.33, 0.36, 0.39) hydrogen storage alloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2016.
APA	Tian, Xiao.,Wei, Wei.,Duan, Ruxia.,Zheng, Xinyao.,Zhang, Huaiwei.,...&Li, Xingguo.(2016).Preparation and electrochemical properties of La0.70MgxNi2.45Co0.75Al0.30 (x=0, 0.30, 0.33, 0.36, 0.39) hydrogen storage alloys.JOURNAL OF ALLOYS AND COMPOUNDS.
MLA	Tian, Xiao,et al."Preparation and electrochemical properties of La0.70MgxNi2.45Co0.75Al0.30 (x=0, 0.30, 0.33, 0.36, 0.39) hydrogen storage alloys".JOURNAL OF ALLOYS AND COMPOUNDS (2016).