On the dehydrogenation of LiAlH4 enhanced by Ti salts and cryogenic ball-milling |
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| Affiliation: | 1. Department of Nuclear and Plasma Physics, Vinča Institute of Nuclear Sciences – National Institute of the Republic of Serbia, University of Belgrade, P.O. Box 522, 11001 Belgrade, Serbia;2. Center of Excellence for Hydrogen and Renewable Energy CONVINCE, Serbia;3. Jozef Stefan Institute, Jamova Cesta 39, 1000, Ljubljana, Slovenia;1. Merlin Group, School of Chemical Engineering, The University of New South Wales, Sydney NSW 2052, Australia;2. Mark Wainwright Analytical Centre, The University of New South Wales, Sydney NSW 2052, Australia;3. Microscopy & Microanalysis Facility, John de Laeter Centre, Curtin University, WA 6102, Australia;1. Energy Storage Research Group, Faculty of Ocean Engineering Technology and Informatics, Universiti Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, Malaysia;2. Faculty of Innovative Design and Technology, Universiti Sultan Zainal Abidin, Gong Badak Campus, 21300, Kuala Nerus, Terengganu, Malaysia;1. Advanced Energy Storage Materials and Devices Laboratory, School of Physics and Electronic-Electrical Engineering, Ningxia University, Yinchuan, 750021, PR China;2. School of Materials Science and Engineering, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, South China University of Technology, Guangzhou, 510641, PR China |
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| Abstract: | Several mixtures of LiAlH4 and Ti salts (TiH2, TiF3, and TiCl4) were produced using short milling times and cryogenic (liquid nitrogen) cooling. The stoichiometric (2:1) and 5 mol% mixtures LiAlH4/TiH2 demonstrated minor improvements on the dehydrogenation temperature of LiAlH4. Conversely, an enhancement of the dehydrogenation reaction was observed in the LiAlH4 added with 5 mol% of TiCl4 and in the stoichiometric mixture 3LiAlH4 + TiF3. In these mixtures, an important reduction of the dehydrogenation temperature was observed (37 °C and 55 °C on-set temperature, respectively). This improvement was promoted by the use of cryogenic ball milling and careful control of the energy added to the mixtures during ball milling. |
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| Keywords: | Hydrogen storage Alanates Cryogenic ball-milling |
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