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
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume731Pages:172-180
Subtype期刊论文
AbstractLaNi5-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.
KeywordCapacity Degradation Mechanism Electrochemical Properties Cycling Performance Absorbing Alloys Sn-substitution Hydride System Ni Co Lani4.7al0.3
DOI10.1016/j.jallcom.2017.10.042
Indexed BySCI
Language英语
WOS IDWOS:000415930900025
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/29064
Collection中科院上海应用物理研究所2011-2018年
Affiliation1.Liu, JJ
2.Zheng, Z
3.Cheng, HH
4.Li, K
5.Yan, K
6.Han, XB
7.Wang, Y
8.Liu, Y
Recommended Citation
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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