Improved reversible dehydrogenation of LiBH4-MgH2 composite by the synergistic effects of Al and MgO

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	Improved reversible dehydrogenation of LiBH4-MgH2 composite by the synergistic effects of Al and MgO
	Y. J. Thong; X. D. Kang; K. K. Wang; P. Wang
	2014
发表期刊	International Journal of Hydrogen Energy
ISSN	0360-3199
卷号	39 期号:5 页码:2187-2193
摘要	In this paper, we report a novel method of improving the reversible dehydrogenation properties of the 2LiBH(4)-MgH2 composite. Our study found that mechanically milling with small amount of Al powder can markedly shorten or even eliminate the problematic incubation period that interrupts the dehydrogenation steps of the 2LiBH(4)-MgH2 composite. But the resulting composite showed serious kinetics degradation upon cycling. In an effort to solve this problem, we found that combined usage of small amounts of Al and MgO enabled the 2LiBH(4)-MgH2 composite to rapidly and reversibly deliver around 9 wt% hydrogen at 400 degrees C under 0.3 MPa H-2, which compares favorably with the dehydrogenation performance of the composites with transition-metal additives. A combination of phase/microstructural analyses and series of control experiments has been conducted to gain insight into the promoting effects of Al and MgO. It was found that Al and MgO additives act as precursor and promoter for the formation of AlB2 heterogeneous nucleation sites, respectively. Copyright (C) 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
部门归属	[thong, yujie ; kang, xiangdong ; wang, kuikui ; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. [wang, kuikui] univ sci & technol china, hefei 230026, peoples r china. ; wang, p (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; pingwang@imr.ac.cn
关键词	Hydrogen Storage Lithium Borohydride Reactive Hydride Composite Aluminum Magnesium Oxide Reactive Hydride Composites Hydrogen-storage Materials Lithium Borohydride Complex Hydrides Recent Progress Ti Decomposition Additives 2libh(4) Kinetics
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72578
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. J. Thong,X. D. Kang,K. K. Wang,et al. Improved reversible dehydrogenation of LiBH4-MgH2 composite by the synergistic effects of Al and MgO[J]. International Journal of Hydrogen Energy,2014,39(5):2187-2193.
APA	Y. J. Thong,X. D. Kang,K. K. Wang,&P. Wang.(2014).Improved reversible dehydrogenation of LiBH4-MgH2 composite by the synergistic effects of Al and MgO.International Journal of Hydrogen Energy,39(5),2187-2193.
MLA	Y. J. Thong,et al."Improved reversible dehydrogenation of LiBH4-MgH2 composite by the synergistic effects of Al and MgO".International Journal of Hydrogen Energy 39.5(2014):2187-2193.