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Hydrogen Storage Properties of a Combined Li3AlH6-LiBH4 System

Author(s):
Young Joon Choi, Jun Lu, Hong Yong Sohn, Zak Fang

Lithium based complex hydrides, including lithium aluminum hydrides and lithium borohydride (LiAlH4, Li3AlH6 and LiBH4), are among the most promising materials due to their high hydrogen contents. In the present work, we investigated the hydrogen storage properties of a new combined system of Li3AlH6-LiBH4. The samples were made with small amounts of catalyst under low energy milling conditions. Thermogravimetric analysis (TGA) of a Ti-doped Li3AlH6/2LiBH4 indicated that the degree of hydrogen release reached 7.3 wt. % by the time the sample reached 450”ĘC under a heating rate of 2”ĘC/min. This increased to 8.8 wt. % when the sample was held at 450”ĘC for additional 8 hours minutes under this condition. The dehydrogenation product was a mixture of LiH and AlB2. This product could be rehydrogenated up to 3.8 wt. % under 24.1 MPa hydrogen pressure and 450”ĘC.

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Track ID:
Paper #: 1098-HH03-36
DOI: