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Synthesis and characterization of novel
hydrogen storage materials
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Roberto Gobetto, Marcello Baricco, Michele R. Chierotti, Federico Franco, Carlo Nervi, Federico M. Paruzzo, Anna R. Wolczyk
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Department of Chemistry and NIS, University of Torino, via P. Giuria 7, 10125 Torino, Italy, e-mail: Roberto.gobetto@unito.it
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Borohydride- and nitride- based materials exhibit very high hydrogen storage capacities up to 18 wt%, and they also show excellent properties as novel solid room temperature ion conductors or negative electrode materials with improved capacity, thus allowing for very high energy storage densities.[1] For commercial use a prerequisite is the cost efficient large scale production from abundant and relatively cheap raw materials combined with scale-up-ability, and to demonstrate the techno-economical readiness on the prototype scale. The objectives of our study are therefore to obtain a fundamental understanding of metal hydride based energy storage materials, and to develop them towards industrial implementation, achieving high technical performance as well as cost effectiveness. One of the target on energy storage materials is the development of novel metal borohydrides in combination with nitrogen based hydrides, in order to obtain species having high hydrogen densities, low decomposition temperatures, high ion conductivities at low temperatures, and high electrochemical capacities.
A series of new hydrogen storage materials based on the complex hydrides have been synthesized and fully characterized by XRD, SEM, TEM, TGA, HP DSC, Raman, ssNMR, electrochemical techniques (voltammetry, impedance spectroscopy) and modelling (calphad, QE, Ab initio). An integrated experimental-theoretical approach for the SSNMR investigation of metal hydrides and borohydrides, mainly focusing on the computation of the 1H, 23Na, 11B, and 6Li
SSNMR parameters by means of the GIPAW method has been also developed.[2]
[1] a) Pinkerton, F.E., Meisner, G.P., Meyer, M.S., Balogh, M.P., Kundrat, M.D. J. Phys.
Chem. B, 109 (2005) 6–8. b) Guo, Y., Wu, H., Zhou, W., Yu, X. J. Am. Chem. Soc., 133 (2011)
4690–4693.
[2] Franco, F.; Baricco, M.; Chierotti, M.R.; Gobetto, R.; Nervi, C. J. Phys. Chem. C 117 (2013) 9991−9998.
