Abstract
A wet loading method was developed to produce nano-sized LiBH4 combined with nano- SiO2 templates. The multicomponent LiBH4/SiO2 material synthesized by the wet method has been found to dehydrogenate at much lower temperatures than the pure LiBH4, as well as LiBH4/SiO2 mixtures prepared by ball milling. For example, the onset of dehydrogenation was decreased to about 200 °C for a wet-treated LiBH4/SiO2 mixture with a mass ratio of 1:1, and the majority of the hydrogen could be released below 350°C. The improved dehydrogenation of the wet-treated LiBH4/SiO2 mixtures can be attributed to the destabilization of SiO2, resulting in the formation of lithium metasilicate (Li2SiO3) upon heating, and the confinement of LiBH4 to form nanoscale particles.
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Chen, X.Y., Guo, Y.H., Gao, L. et al. Improved dehydrogenation of LiBH4 supported on nanoscale SiO2 via liquid phase method. Journal of Materials Research 25, 2415–2421 (2010). https://doi.org/10.1557/jmr.2010.0301
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DOI: https://doi.org/10.1557/jmr.2010.0301