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

doi:10.1016/j.jallcom.2017.10.042

CAS OpenIR > 中科院上海应用物理研究所2011-2018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
	2018
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	731 页码:172-180
文章类型	期刊论文
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.
关键词	Capacity Degradation Mechanism Electrochemical Properties Cycling Performance Absorbing Alloys Sn-substitution Hydride System Ni Co Lani4.7al0.3
DOI	10.1016/j.jallcom.2017.10.042
收录类别	SCI
语种	英语
WOS记录号	WOS:000415930900025
引用统计
文献类型	期刊论文
条目标识符	http://ir.sinap.ac.cn/handle/331007/29064
专题	中科院上海应用物理研究所2011-2018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.

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