Effect of hydrogen absorption/desorption cycling on hydrogen storage performance of LaNi4.25Al0.75

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	Effect of hydrogen absorption/desorption cycling on hydrogen storage performance of LaNi4.25Al0.75
	H. H. Cheng ; H. G. Yang ; S. L. Li ; X. X. Deng ; D. M. Chen ; K. Yang
刊名	Journal of Alloys and Compounds
	2008
卷号	453 期号:1-2 页码:448-452
关键词	hydrogen storage alloy metal hydride gas-solid reactions hydrogenation cycling hydriding alloys metal-hydrides lani5 degradation lani4.7al0.3 stability impurity mmni4.5al0.5 oxygen h2o
ISSN号	0925-8388
中文摘要	The effect of hydrogen absorption/desorption cycling on the hydrogen storage properties of LaNi4.25Al0.75 was investigated. The pressure-composition (PC) isotherms for absorption/desorption and absorption kinetics were measured at 363, 383 and 403 K, for both after initial activation and 1000 absorption/desorption cycles. The plateau pressures and storage capacity absorption kinetics were slightly changed after long-term cycles, while significant degradation of absorption kinetics was observed. Cycling could result in pulverization of the bulk alloy. The particle size distribution after 1000 cycles was narrower (0.36-103 mu m) compared to that after initial activation (0.78-301 mu m), with volume mean diameter decreasing from 34.81 to 11.34 mu m. The change of hydrogen absorption/desorption properties of LaNi4.25Al0.75 over 1000 cycles has been explained by considering the disproportionation property of LaNi4.25Al0.75, the pulverization phenomena and the impurities from charging hydrogen employed in cycling. (c) 2006 Elsevier B.V. All rights reserved.
原文出处	://WOS:000254899700082
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://210.72.142.130/handle/321006/32687]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	H. H. Cheng,H. G. Yang,S. L. Li,et al. Effect of hydrogen absorption/desorption cycling on hydrogen storage performance of LaNi4.25Al0.75[J]. Journal of Alloys and Compounds,2008,453(1-2):448-452.
APA	H. H. Cheng,H. G. Yang,S. L. Li,X. X. Deng,D. M. Chen,&K. Yang.(2008).Effect of hydrogen absorption/desorption cycling on hydrogen storage performance of LaNi4.25Al0.75.Journal of Alloys and Compounds,453(1-2),448-452.
MLA	H. H. Cheng,et al."Effect of hydrogen absorption/desorption cycling on hydrogen storage performance of LaNi4.25Al0.75".Journal of Alloys and Compounds 453.1-2(2008):448-452.