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Pressure and temperature dependence of the decomposition pathway of LiBH_4

Yan, Yigang and Remhof, Arndt and Hwang, Son-Jong and Li, Hai-Wen and Mauron, Philippe and Orimo, Shin-ichi and Züttel, Andreas (2012) Pressure and temperature dependence of the decomposition pathway of LiBH_4. Physical Chemistry Chemical Physics, 14 (18). pp. 6514-6519. ISSN 1463-9076.

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The decomposition pathway is crucial for the applicability of LiBH_4 as a hydrogen storage material. We discuss and compare the different decomposition pathways of LiBH_4 according to the thermodynamic parameters and show the experimental ways to realize them. Two pathways, i.e. the direct decomposition into boron and the decomposition via Li_2B_(12)H_(12), were realized under appropriate conditions, respectively. By applying a H_2 pressure of 50 bar at 873 K or 10 bar at 700 K, LiBH_4 is forced to decompose into Li_2B_(12)H_(12). In a lower pressure range of 0.1 to 10 bar at 873 K and 800 K, the concurrence of both decomposition pathways is observed. Raman spectroscopy and ^(11)B MAS NMR measurements confirm the formation of an intermediate Li_2B_(12)H_(12) phase (mostly Li_2B_(12)H_(12) adducts, such as dimers or trimers) and amorphous boron.

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Hwang, Son-Jong0000-0002-3210-466X
Additional Information:© 2012 Owner Societies. Received 13 Jan 2012, Accepted 07 Mar 2012. First published on the web 08 Mar 2012. Financial support from the Swiss National Science Foundation (SNF 200021_129603/1), from the Korea Research Council of Fundamental Science and Technology and by a grant from Switzerland through the Swiss Contribution to the enlarged European Union is gratefully appreciated. S.-J. H. kindly acknowledges the partial support from the U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, through the Hydrogen, Fuel Cells & Infrastructure Technologies Program under contract number DE-AI-01- 05EE11105 (JPL-Caltech). The NMR facility at Caltech was supported by the National Science Foundation (NSF) under Grant Number 9724240 and partially supported by the MRSEC Program of the NSF under Award Number DMR- 520565. S. O. kindly acknowledges the support by "funding Program for Next Generation World-Leading Researchers (No. GR008)" and "ICC-IMR".
Funding AgencyGrant Number
Swiss National Science Foundation (SNSF)SNF 200021_129603/1
Korea Research Council of Fundamental Science and TechnologyUNSPECIFIED
Department of Energy (DOE)DE-AI-01-05EE11105
Program for Next Generation World-Leading ResearchersGR008
Swiss ContributionUNSPECIFIED
Issue or Number:18
Record Number:CaltechAUTHORS:20120525-071657678
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Official Citation:Pressure and temperature dependence of the decomposition pathway of LiBH4 Yigang Yan, Arndt Remhof, Son-Jong Hwang, Hai-Wen Li, Philippe Mauron, Shin-ichi Orimo and Andreas Züttel Phys. Chem. Chem. Phys., 2012, 14, 6514-6519 DOI: 10.1039/C2CP40131B
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:31643
Deposited By: Ruth Sustaita
Deposited On:25 May 2012 15:34
Last Modified:03 Oct 2019 03:53

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