In situX-ray Raman spectroscopy of LiBH4

Literature Information

Publication Date 2012-02-27
DOI 10.1039/C2CP24025D
Impact Factor 3.676
Authors

Piter S. Miedema, Peter Ngene, Ad M. J. van der Eerden, Tsu-Chien Weng, Dennis Nordlund, Dimosthenis Sokaras, Roberto Alonso-Mori, Amélie Juhin, Petra E. de Jongh, Frank M. F. de Groot


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Abstract

X-Ray Raman Spectroscopy (XRS) is used to study the electronic properties of bulk lithium borohydride (LiBH4) and LiBH4 in porous carbon nano-composites (LiBH4/C) during dehydrogenation. The lithium (Li), boron (B) and carbon (C) K-edges are studied and compared with calculations of the starting material and intermediate compounds. Comparison of the B and C K-edge XRS spectra of the as-prepared samples with rehydrogenated samples shows that the B and C electronic structure is largely regained after rehydrogenation. Both Li and C K-edge spectra show that during dehydrogenation, part of the Li intercalates into the porous carbon. This study shows that XRS in combination with calculations is a promising tool to study the electronic properties of nano-crystalline light-weight materials for energy storage.

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