Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride

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	Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride; Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride
	P. J. Wang; L. P. Ma; Z. Z. Fang; X. D. Kang; P. Wang
	2009 ; 2009
发表期刊	Energy & Environmental Science ; Energy & Environmental Science
ISSN	1754-5692 ; 1754-5692
卷号	2 期号:1 页码:120-123
摘要	The Li-Mg-B-H system that is prepared from 2LiH + MgB(2) or 2LiBH(4) + MgH(2) possesses high hydrogen capacity and relatively favorable thermodynamics, but it is greatly restricted in practical hydrogen storage applications by problematic H-exchange kinetics. In the present study, TiF(3) was mechanically milled with a 2LiH + MgB(2) mixture and examined with respect to its effect on reversible dehydrogenation of the Li-Mg-B-H system. Experimental study showed that TiF(3) is highly effective for promoting the two-step dehydrogenation reaction in the Li-Mg-B-H system. Compared to the neat 2LiH + MgB(2) sample, the 2LiH + MgB(2) + 0.01TiF(3) sample exhibits significantly reduced dehydrogenation temperature and markedly enhanced dehydriding rate at both steps. Furthermore, the catalytic enhancement arising upon adding TiF(3) additive was observed to persist well in the hydrogenation/dehydrogenation cycles. Based on the results of phase analysis and a series of designed experiments, the mechanism underlying the observed property improvement is discussed.; The Li-Mg-B-H system that is prepared from 2LiH + MgB(2) or 2LiBH(4) + MgH(2) possesses high hydrogen capacity and relatively favorable thermodynamics, but it is greatly restricted in practical hydrogen storage applications by problematic H-exchange kinetics. In the present study, TiF(3) was mechanically milled with a 2LiH + MgB(2) mixture and examined with respect to its effect on reversible dehydrogenation of the Li-Mg-B-H system. Experimental study showed that TiF(3) is highly effective for promoting the two-step dehydrogenation reaction in the Li-Mg-B-H system. Compared to the neat 2LiH + MgB(2) sample, the 2LiH + MgB(2) + 0.01TiF(3) sample exhibits significantly reduced dehydrogenation temperature and markedly enhanced dehydriding rate at both steps. Furthermore, the catalytic enhancement arising upon adding TiF(3) additive was observed to persist well in the hydrogenation/dehydrogenation cycles. Based on the results of phase analysis and a series of designed experiments, the mechanism underlying the observed property improvement is discussed.
部门归属	[wang, peijun; ma, laipeng; fang, zhanzhao; kang, xiangdong; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, pj (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;pingwang@imr.ac.cn ; [wang, peijun; ma, laipeng; fang, zhanzhao; kang, xiangdong; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, pj (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, 72 wenhua rd, shenyang 110016, peoples r china;pingwang@imr.ac.cn
关键词	Complex Hydrides Complex Hydrides Libh4 Libh4 Tif3 Tif3 Kinetics Kinetics Naalh4 Naalh4
URL	查看原文 ; 查看原文
WOS记录号	WOS:000263888700024 ; WOS:000263888700024
引用统计	被引频次：58[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/32369
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. J. Wang,L. P. Ma,Z. Z. Fang,et al. Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride, Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride[J]. Energy & Environmental Science, Energy & Environmental Science,2009, 2009,2, 2(1):120-123, 120-123.
APA	P. J. Wang,L. P. Ma,Z. Z. Fang,X. D. Kang,&P. Wang.(2009).Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride.Energy & Environmental Science,2(1),120-123.
MLA	P. J. Wang,et al."Improved hydrogen storage property of Li-Mg-B-H system by milling with titanium trifluoride".Energy & Environmental Science 2.1(2009):120-123.