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  Improved hydrogen storage properties of LiBH4 via nanoconfinement in micro- and mesoporous aerogel-like carbon

Surrey, A., Minella, C. B., Fechler, N., Antonietti, M., Grafe, H.-J., Schultz, L., et al. (2016). Improved hydrogen storage properties of LiBH4 via nanoconfinement in micro- and mesoporous aerogel-like carbon. International Journal of Hydrogen Energy, 41(12), 5540-5548. doi:10.1016/j.ijhydene.2016.01.163.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-10BD-9 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-10BE-7
Genre: Journal Article

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 Creators:
Surrey, Alexander, Author
Minella, Christian Bonatto, Author
Fechler, Nina1, Author              
Antonietti, Markus2, Author              
Grafe, Hans-Joachim, Author
Schultz, Ludwig, Author
Rellinghaus, Bernd, Author
Affiliations:
1Nina Fechler, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2173643              
2Markus Antonietti, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863321              

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Free keywords: Nanoconfinement
 Abstract: Herein, we present the effect of the nanoconfinement of LiBH4 within porous aerogel-like carbon on its hydrogen storage properties. The carbon scaffold is prepared by salt templating – a facile and sustainable technique for the production of micro- and mesoporous carbon-based materials. A loading of up to 40 wt. of LiBH4 is achieved by melt infiltration, and the hydride remains amorphous as shown by differential scanning calorimetry (DSC), X-ray diffractometry (XRD) and scanning transmission electron microscopy (STEM). Simultaneous thermogravimetry and mass spectroscopy (TG-MS) reveal that the nanoconfined LiBH4 starts to desorb hydrogen already at 200 °C with the main release at 310 °C. A partial rehydrogenation at moderate conditions (100 bar and 300 °C) is demonstrated. In contrast to recent reports, in-situ heating in the transmission electron microscope (STEM) and electron energy loss spectroscopy (EELS) indicate that both decomposition products (B and LiH) remain within the carbon pores. Nuclear magnetic resonance (NMR) measurements reveal the presence of amorphous and partially oxidized boron in the dehydrogenated sample that may impede the reversibility of the (de)hydrogenation process.

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 Dates: 2016-03-042016-04-06
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.1016/j.ijhydene.2016.01.163
BibTex Citekey: Surrey2016
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Title: International Journal of Hydrogen Energy
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: - Volume / Issue: 41 (12) Sequence Number: - Start / End Page: 5540 - 5548 Identifier: ISSN: 0360-3199