Long-term hydrogen storage performance and structural evolution of LaNi4Al alloy

doi:10.1016/j.jallcom.2017.10.042

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017年

	Long-term hydrogen storage performance and structural evolution of LaNi4Al alloy
	Liu, JJ ; Zheng, Z ; Cheng, HH ; Li, K ; Yan, K ; Han, XB ; Wang, Y ; Liu, Y
刊名	JOURNAL OF ALLOYS AND COMPOUNDS
	2018
卷号	731 页码:172-180
关键词	Capacity Degradation Mechanism Electrochemical Properties Cycling Performance Absorbing Alloys Sn-substitution Hydride System Ni Co Lani4.7al0.3
ISSN号	0925-8388
DOI	10.1016/j.jallcom.2017.10.042
文献子类	期刊论文
英文摘要	LaNi5-based hydrogen storage alloys have a strong application potential in many areas such as gaseous hydrogen storage, hydrogen compressing, Ni/MH batteries etc. But the cycling stability is always an important issue of concern. In this study, the changes in the hydrogen storage performance of the LaNi4Al alloy at 403, 423 and 443 K during 1000 hydrogen absorption/desorption cycles are studied, and the degradation mechanism is explored using EXAFS as a main study method. It is found that with increasing cycle number, the P-C-T plateau first becomes flattened then steepened, the plateau pressure and the hysteresis are decreased, the entropy change for both hydrogen absorption and desorption first increases and then decreases, and the hydrogen storage capacity decreases. Testing temperature does not have notable influence in the variation trend of the long-term hydrogen storage properties. The degradation is mainly reflected by the tilted P-C-T plateau and the reduced hydrogen storage capacity. Structural analysis results suggest that the strain-induced nanocrystalization and the atomic mis-location during hydrogen absorption/desorption might cause a high disorder state and a partial destruction in LaNi5 crystal lattice, resulting in the degradation in the hydrogen storage properties. (C) 2017 Elsevier B.V. All rights reserved.
语种	英语
WOS记录号	WOS:000415930900025
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/29064]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
作者单位	1.Liu, JJ 2.Zheng, Z 3.Cheng, HH 4.Li, K 5.Yan, K 6.Han, XB 7.Wang, Y 8.Liu, Y
推荐引用方式 GB/T 7714	Liu, JJ,Zheng, Z,Cheng, HH,et al. Long-term hydrogen storage performance and structural evolution of LaNi4Al alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2018,731:172-180.
APA	Liu, JJ.,Zheng, Z.,Cheng, HH.,Li, K.,Yan, K.,...&Liu, Y.(2018).Long-term hydrogen storage performance and structural evolution of LaNi4Al alloy.JOURNAL OF ALLOYS AND COMPOUNDS,731,172-180.
MLA	Liu, JJ,et al."Long-term hydrogen storage performance and structural evolution of LaNi4Al alloy".JOURNAL OF ALLOYS AND COMPOUNDS 731(2018):172-180.