LiF−MgB2 System for Reversible Hydrogen Storage

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• 作者：R. Gosalawit-Utke ; J. M. Bellosta von Colbe ; M. Dornheim ; T. R. Jensen ; Y. Cerenius ; Christian Bonatto Minella ; Maik Peschke ; R. Bormann
• 刊名：Journal of Physical Chemistry C
• 出版年：2010
• 出版时间：June 10, 2010
• 年：2010
• 卷：114
• 期：22
• 页码：10291-10296
• 全文大小：285K
• 年卷期：v.114,no.22(June 10, 2010)
• ISSN：1932-7455

文摘

LiF−MgB₂ composites are proposed for reversible hydrogen storage. With respect to pure LiBH₄, a significantly kinetic destabilization regarding hydrogenation and dehydrogenation is accomplished. The reversible hydrogen storage capacity is up to 6.4 wt %. The kinetic properties are improved significantly during cycling. The formations of the hydridofluoride phases (LiBH_4−yF_y and LiH_1−xF_x) are observed by in situ synchrotron X-ray diffraction (XRD) and attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR). Hydrogenation and dehydrogenation mechanisms are described on the basis of the formation and decomposition of the hydridofluoride phases, respectively.