Reversible hydrogen storage from 6LiBH4–MCl3 (M = Ce, Gd) composites by in-situ formation of MH2
✍ Scribed by F.C. Gennari; L. Fernández Albanesi; J.A. Puszkiel; P. Arneodo Larochette
- Publisher
- Elsevier Science
- Year
- 2011
- Tongue
- English
- Weight
- 752 KB
- Volume
- 36
- Category
- Article
- ISSN
- 0360-3199
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✦ Synopsis
Different destabilized LiBH 4 systems with several interacting components are being explored for hydrogen storage applications. In this study, hydrogen sorption properties of as-milled 6LiBH 4 eMCl 3 composites (M ¼ Ce, Gd) are investigated by X-ray diffraction, differential scanning calorimetry and thermovolumetric measurements. The chemical interaction between metal halides and LiBH 4 decreases the dehydrogenation temperature in comparison with as-milled LiBH 4 . Hydrogen release starts at 220 C from the decomposition of M(BH 4 ) 3 formed during milling and proceeds through destabilization of LiBH 4 by in-situ formed MH 2 . The dehydrogenation products CeB 6 eLiH and GdB 4 eLiH can be rehydrided under moderate conditions, i.e 400 C and 6.0 MPa of hydrogen pressure for 2 h without catalyst. A new 6LiBH 4 eCeCl 3 e3LiH composite shows promissory hydrogen storage properties via the formation by milling of CeH 2þx . Our study is the first work about reversible hydrogen storage in LiBH 4 eMCl 3 composites destabilized by in-situ formed MH 2 .