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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
Source PublicationInternational Journal of Hydrogen Energy
ISSN0360-3199
Volume39Issue:5Pages:2187-2193
AbstractIn 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.
description.department[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
KeywordHydrogen 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
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/72578
Collection中国科学院金属研究所
Recommended Citation
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.
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