Microstructure and hydrogen storage property of Mg/MWNTs composites

IMR OpenIR

	Microstructure and hydrogen storage property of Mg/MWNTs composites
	Chen, D ; Chen, L ; Liu, S ; Ma, CX ; Chen, DM ; Wang, LB
通讯作者	Chen, D(dchen@imr.ac.cn)
	2004-06-09
发表期刊	JOURNAL OF ALLOYS AND COMPOUNDS
ISSN	0925-8388
卷号	372 期号:1-2 页码:231-237
摘要	The Mg-x wt.% multi-walled nanotubes (MWNTs) (x = 5, 20) composites were made by catalytic reacting ball-milling under the hydrogen atmosphere. Their microstructures were characterized by using XRD and TEM-SAED techniques. The absorption/desorption kinetics for Mg/MWNTs were examined by taking the hydriding/dehydriding apparatus. It was found that under 2.0 MPa hydrogen pressure, the maximum hydrogen storage capacities of the composites were both very low and similar at 298 K; at 373, 473 and 553 K, the maximum hydrogen storage capacities of Mg-5 wt.% MWNTs were 5.34, 5.89 and 6.08 wt.%, respectively; but only 2.11, 2.68 and 2.75 wt.% for Mg-20 wt.% MWNTs. Compared with other hydrogen storage composite materials, the Mg-5 wt.% MWNTs not only keeps the maximum hydrogen storage capacities better but also has good hydrogen absorption/desorption rates. It absorbed 4.27, 4.86 wt.% (80% maximum hydrogen storage capacity) within 15 and 1 min at 373 and 553 K under 2.0 MPa, while it desorbed 3.62 wt.% within 30 min at 473 K in vacuum. The carbon component (the broken MWNTs) in the composite may play an important role in the hydrogen uptake and release. A favorable discussion was given in this paper. (C) 2003 Elsevier B.V. All rights reserved.
关键词	Mg/MWNTs composite catalytic reacting ball-milling microstructure hydrogen absorption/desorption kinetics
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000221704800046
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/81128
通讯作者	Chen, D
作者单位	1.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China 2.NE Univ Technol, Coll Sci, Shenyang 110006, Peoples R China
推荐引用方式 GB/T 7714	Chen, D,Chen, L,Liu, S,et al. Microstructure and hydrogen storage property of Mg/MWNTs composites[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2004,372(1-2):231-237.
APA	Chen, D,Chen, L,Liu, S,Ma, CX,Chen, DM,&Wang, LB.(2004).Microstructure and hydrogen storage property of Mg/MWNTs composites.JOURNAL OF ALLOYS AND COMPOUNDS,372(1-2),231-237.
MLA	Chen, D,et al."Microstructure and hydrogen storage property of Mg/MWNTs composites".JOURNAL OF ALLOYS AND COMPOUNDS 372.1-2(2004):231-237.