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Issue 19, 2010
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Hydrogen tracer diffusion in LiBH4 measured by spatially resolved Raman spectroscopy

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Abstract

The hydrogen tracer diffusion in LiBH4 has been determined by spatially resolved Raman spectroscopy. The measurements give direct evidence of a macroscopic diffusion of BH4 ions as well as atomic exchange of hydrogen between the anions. An effective tracer diffusion coefficient of deuterium in LiBH4 of D ≃ 7 × 10−14m2 s−1 at 473 K is derived. The direct exchange rate of hydrogen between BH4 units is 10 orders of magnitude slower, i.e. the relatively fast effective hydrogen diffusion has its origin in the fast diffusion of BH4 units.

Graphical abstract: Hydrogen tracer diffusion in LiBH4 measured by spatially resolved Raman spectroscopy

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Publication details

The article was received on 05 Jan 2010, accepted on 12 Feb 2010 and first published on 29 Mar 2010


Article type: Paper
DOI: 10.1039/C000229A
Citation: Phys. Chem. Chem. Phys., 2010,12, 5061-5066
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    Hydrogen tracer diffusion in LiBH4 measured by spatially resolved Raman spectroscopy

    A. Borgschulte, R. Gremaud, Z. Łodziana and A. Züttel, Phys. Chem. Chem. Phys., 2010, 12, 5061
    DOI: 10.1039/C000229A

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