|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
|Source Publication||Physical Chemistry Chemical Physics
|Abstract||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.|
; 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.
|Keyword||Reactive Hydride Composites
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.
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.
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.
|Files in This Item:||
||There are no files associated with this item.
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.