Nanoconfined 2LiBH4–MgH2–TiCl3 in carbon aerogel scaffold for reversible hydrogen storage

Nanoconfinement of 2LiBH4–MgH2–TiCl3 in resorcinol–formaldehyde carbon aerogel scaffold (RF–CAS) for reversible hydrogen storage applications is proposed. RF–CAS is encapsulated with approximately 1.6 wt. % TiCl3 by solution impregnation technique, and it is further nanoconfined with bulk 2LiBH4–MgH...

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Published in:International journal of hydrogen energy 2013-03, Vol.38 (8), p.3275-3282
Main Authors: Gosalawit-Utke, Rapee, Milanese, Chiara, Javadian, Payam, Jepsen, Julian, Laipple, Daniel, Karmi, Fahim, Puszkiel, Julián, Jensen, Torben R., Marini, Amedeo, Klassen, Thomas, Dornheim, Martin
Format: Article
Language:English
Subjects:
Alternative fuels. Production and utilization
Applied sciences
Carbon aerogel scaffold
Cross-disciplinary physics: materials science
rheology
Energy
Exact sciences and technology
Fuels
Hydrogen
Hydrogen storage
Lithium borohydride
Magnesium hydride
Materials science
Nanoconfinement
Other topics in materials science
Physics
Titanium trichloride
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Summary:Nanoconfinement of 2LiBH4–MgH2–TiCl3 in resorcinol–formaldehyde carbon aerogel scaffold (RF–CAS) for reversible hydrogen storage applications is proposed. RF–CAS is encapsulated with approximately 1.6 wt. % TiCl3 by solution impregnation technique, and it is further nanoconfined with bulk 2LiBH4–MgH2 via melt infiltration. Faster dehydrogenation kinetics is obtained after TiCl3 impregnation, for example, nanoconfined 2LiBH4–MgH2–TiCl3 requires ∼1 and 4.5 h, respectively, to release 95% of the total hydrogen content during the 1st and 2nd cycles, while nanoconfined 2LiBH4–MgH2 (∼2.5 and 7 h, respectively) and bulk material (∼23 and 22 h, respectively) take considerably longer. Moreover, 95–98.6% of the theoretical H2 storage capacity (3.6–3.75 wt. % H2) is reproduced after four hydrogen release and uptake cycles of the nanoconfined 2LiBH4–MgH2–TiCl3. The reversibility of this hydrogen storage material is confirmed by the formation of LiBH4 and MgH2 after rehydrogenation using FTIR and SR-PXD techniques, respectively. ► TiCl3 doped in nanoconfined 2LiBH4–MgH2 via simple solution impregnation technique. ► At least twice faster desorption kinetics obtained from only 1.6 wt. % TiCl3 doping. ► Up to 98.6% H2 content reproduced after four H2 release and uptake cycles.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2012.12.123