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The Stability and Reversibility of TiCl3 Doped LiBH4

Published online by Cambridge University Press:  01 February 2011

Ming Au ,
Arthur R Jurgensen ,
William A Spenser ,
Donald L Anton  and
Frederick E Pinkerton
Ming Au
Affiliation:
[email protected], Savannah River National Laboratory, Energy Security, 999-2w, Aiken, SC, 29808, United States, 8035078547
Arthur R Jurgensen
Affiliation:
[email protected], Savannah River National Laboratory, Aiken, SC, 29808, United States
William A Spenser
Affiliation:
[email protected], Savannah River National Laboratory, Aiken, SC, 29808, United States
Donald L Anton
Affiliation:
[email protected], Savannah River National Laboratory, Aiken, SC, 29808, United States
Frederick E Pinkerton
Affiliation:
[email protected], General Motor, Warren, MI, 48088, United States
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Abstract

In an effort to develop reversible metallic borohydrides with high hydrogen storage capacities and low dehydriding temperature, modifications to LiBH4 with metal halides TiCl3 have been conducted. Adding TiCl3 to LiBH4 effectively reduced the dehydriding temperature through an ion exchange interaction by producing instable transition metal borohydrides and lithium salts. The material LiBH4+0.1TiCl3 desorbed 3.5wt% and 8.5wt% hydrogen at 150°C and 450°C respectively. Subsequent re-absorption of 6wt% hydrogen at 500°C and 70 bars was observed. The XRD analysis of the rehydrided samples confirmed the partial reformation of LiBH4. However, adding more TiCl3 made material more volatile and irreversible. TGA-RGA analyses indicated diborane evolution during dehydrogenation resulting in unrecoverable capacity loss and irreversibility. TiCl3 reduced LiBH4 stability and also made material irreversible.

Keywords

energy-storagehydrogenationchemical reaction
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1042: Symposium S – Materials and Technology for Hydrogen Storage , 2007 , 1042-S05-05
Copyright
Copyright © Materials Research Society 2008

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