KH plus Ti co-doped NaAlH(4) for high-capacity hydrogen storage

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	KH plus Ti co-doped NaAlH(4) for high-capacity hydrogen storage
	P. Wang; X. D. Kang; H. M. Cheng
	2005
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	98 期号:7
摘要	A method for preparation of Ti-doped NaAlH(4) with high hydrogen capacity was developed, in which the NaH/Al mixture was mechanically milled with a catalytic amount of KH together with metallic Ti. The addition of KH was found to result in a pronounced improvement in the dehydriding performance of the Na(3)AlH(6)/NaH+Al step. As a result, the practical cycling hydrogen capacity has been markedly enhanced from 3.3 wt % for the Ti-doped hydride to 4.7 wt % for KH+Ti co-doped material. Moreover, the pronounced enhancement on hydrogen capacity arising upon adding KH was observed to persist in the following dehydrogenation/hydrogenation cycles. Structural investigation shows that the addition of KH has led to a lattice expansion. Moreover, it was found that the enthalpy change of the Na(3)AlH(6)/NaH+Al decomposition step underwent a considerable decrease upon adding KH. Therefore, the observed property improvement may be ascribed to a favorable thermodynamic adjustment arising upon the addition of KH. (c) 2005 American Institute of Physics.
部门归属	univ hawaii, dept chem, honolulu, hi 96822 usa. chinese acad sci, inst met res, mat sci lab, shenyang 110016, peoples r china. chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china.;wang, p (reprint author), univ hawaii, dept chem, honolulu, hi 96822 usa;pingwang@imr.ac.cn
关键词	Sodium Aluminum-hydride X-ray-diffraction Metal-hydrides Titanium Alanates Zirconium State Behavior Powder Dehydrogenation
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35088
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	P. Wang,X. D. Kang,H. M. Cheng. KH plus Ti co-doped NaAlH(4) for high-capacity hydrogen storage[J]. Journal of Applied Physics,2005,98(7).
APA	P. Wang,X. D. Kang,&H. M. Cheng.(2005).KH plus Ti co-doped NaAlH(4) for high-capacity hydrogen storage.Journal of Applied Physics,98(7).
MLA	P. Wang,et al."KH plus Ti co-doped NaAlH(4) for high-capacity hydrogen storage".Journal of Applied Physics 98.7(2005).