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Study on the dehydrogenation properties and reversibility of Mg(BH4)(2)-AlH3 composite under moderate conditions
Zheng, JG; Xiao, XZ; Zhang, LT; He, Y; Li, SQ; Ge, HW; Chen, LX
2017
Source PublicationINTERNATIONAL JOURNAL OF HYDROGEN ENERGY
ISSN0360-3199
Volume42Issue:12Pages:8050-8056
Subtype期刊论文
AbstractMg(BH4)(2) has been considered as one of the promising light metal complex hydrides due to its high hydrogen capacity and low cost. But its higher thermal stability (dehydrogenation at above 300 degrees C) needs to be improved for the practical application. In this study, the aluminum hydride AlH3 was introduced into complex borohydride Mg(BH4)(2) to synthesize a new Mg(BH4)(2)-AlH3 composite by ball milling method. It is found that the active Al* formed from the self-decomposition of AlH3 can effectively improve the dehydrogenation properties of Mg(BH4)(2), the Mg(BH4)(2) AlH3 composite starts to release hydrogen at 130.8 degrees C with a total hydrogen capacity of 11.9 wt.%. The dehydrogenated products of the composite is composed of Mg2Al3 and B at 350 degrees C, resulting in the improved hydrogen desorption properties of Mg(BH4)(2) AlH3 composite. The Mg2Al3 and B products would be further transformed into MgAlB4 and Al at 500 degrees C. Moreover, the Mg2Al3 and B dehydrogenated products show better reversible hydrogen storage property than that of the MgAlB4 and Al products. This research shows a way to alter hydrogen de/hydrogenation route and reversibility of Mg(BH4)(2) complex hydride by compositing with AlH3 and controlling the dehydrogenation temperature. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
KeywordHydrogen Storage Mg(Bh4)(2) Alh3 Composite
DOI10.1016/j.ijhydene.2016.12.045
Indexed BySCI
Language英语
WOS IDWOS:000401889800028
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Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/27456
Collection中科院上海应用物理研究所2011-2018年
Recommended Citation
GB/T 7714
Zheng, JG,Xiao, XZ,Zhang, LT,et al. Study on the dehydrogenation properties and reversibility of Mg(BH4)(2)-AlH3 composite under moderate conditions[J]. INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,2017,42(12):8050-8056.
APA Zheng, JG.,Xiao, XZ.,Zhang, LT.,He, Y.,Li, SQ.,...&Chen, LX.(2017).Study on the dehydrogenation properties and reversibility of Mg(BH4)(2)-AlH3 composite under moderate conditions.INTERNATIONAL JOURNAL OF HYDROGEN ENERGY,42(12),8050-8056.
MLA Zheng, JG,et al."Study on the dehydrogenation properties and reversibility of Mg(BH4)(2)-AlH3 composite under moderate conditions".INTERNATIONAL JOURNAL OF HYDROGEN ENERGY 42.12(2017):8050-8056.
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