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Inorganics 2017, 5(4), 71;

Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites

Graduate School of Engineering, Hokkaido University, N-13, W-8, Sapporo 060-8278, Japan
Author to whom correspondence should be addressed.
Received: 30 September 2017 / Revised: 19 October 2017 / Accepted: 23 October 2017 / Published: 25 October 2017
(This article belongs to the Special Issue Functional Materials Based on Metal Hydrides)
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Hexagonal boron nitride (h-BN) is known as an effective additive to improve the hydrogen de/absorption properties of hydrogen storage materials consisting of light elements. Herein, we report the unique hydrogen desorption properties of LiAlH4/h-BN composites, which were prepared by ball-milling. The desorption profiles of the composite indicated the decrease of melting temperature of LiAlH4, the delay of desorption kinetics in the first step, and the enhancement of the kinetics in the second step, compared with milled LiAlH4. Li3AlH6 was also formed in the composite after desorption in the first step, suggesting h-BN would have a catalytic effect on the desorption kinetics of Li3AlH6. Finally, the role of h-BN on the desorption process of LiAlH4 was discussed by comparison with the desorption properties of LiAlH4/X (X = graphite, LiCl and LiI) composites, suggesting the enhancement of Li ion mobility in the LiAlH4/h-BN composite. View Full-Text
Keywords: alanate; h-BN; hydrogen storage; catalyst; Li ion mobility alanate; h-BN; hydrogen storage; catalyst; Li ion mobility

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Nakagawa, Y.; Isobe, S.; Ohki, T.; Hashimoto, N. Unique Hydrogen Desorption Properties of LiAlH4/h-BN Composites. Inorganics 2017, 5, 71.

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