A novel three-step method for preparation of a TiB2-promoted LiBH4-MgH2 composite for reversible hydrogen storage

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	A novel three-step method for preparation of a TiB2-promoted LiBH4-MgH2 composite for reversible hydrogen storage
	X. D. Kang; K. K. Wang; Y. J. Zhong; B. Yang; P. Wang
	2013
发表期刊	Physical Chemistry Chemical Physics
ISSN	1463-9076
卷号	15 期号:6 页码:2153-2158
摘要	The reversible dehydrogenation properties of the 2LiBH(4)-MgH2 composite can be effectively improved by incorporating heterogeneous nucleation agents, typically transition metal borides. A careful study of the 2LiBH(4)-MgH2 composite with a titanium trifluoride (TiF3) additive finds that using the conventional one-step milling method renders only a partial conversion from TiF3 to titanium boride (TiB2) through an intermediate of titanium hydride (TiH2). Based on a fundamental understanding of the reaction processes of the system, we developed a three-step preparation method, which involves pre-milling the LiBH4-TiF3 mixture, isothermal treatment and milling together with MgH2. A combination of phase/chemical state/microstructural analyses using X-ray diffraction, X-ray photoelectron spectroscopy and transmission electron microscopy techniques shows that the newly developed method can effectively promote the formation of TiB2 and meanwhile, ensure a homogeneous dispersion of TiB2 nanoparticles in the composite matrix. As a consequence, the composite sample prepared by the new method exhibits a favorable combination of high hydrogen capacity, fast reaction kinetics and satisfactory cyclic stability.
部门归属	[kang, xiangdong ; wang, kuikui ; zhong, yujie ; yang, bing ; wang, ping] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, 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	Reactive Hydride Composites Lithium Borohydride Metal Borohydrides Sorption Kinetics Complex Hydrides Dehydrogenation Decomposition Carbon Mgh2 Ti
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/321006/71290
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. D. Kang,K. K. Wang,Y. J. Zhong,et al. A novel three-step method for preparation of a TiB2-promoted LiBH4-MgH2 composite for reversible hydrogen storage[J]. Physical Chemistry Chemical Physics,2013,15(6):2153-2158.
APA	X. D. Kang,K. K. Wang,Y. J. Zhong,B. Yang,&P. Wang.(2013).A novel three-step method for preparation of a TiB2-promoted LiBH4-MgH2 composite for reversible hydrogen storage.Physical Chemistry Chemical Physics,15(6),2153-2158.
MLA	X. D. Kang,et al."A novel three-step method for preparation of a TiB2-promoted LiBH4-MgH2 composite for reversible hydrogen storage".Physical Chemistry Chemical Physics 15.6(2013):2153-2158.