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Journal Article

Beneficial effects of stoichiometry and nanostructure for a LiBH4–MgH2 hydrogen storage system

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Shao,  H.
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Felderhoff,  M.
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Hu, J., Witter, R., Shao, H., Felderhoff, M., & Fichtner, M. (2014). Beneficial effects of stoichiometry and nanostructure for a LiBH4–MgH2 hydrogen storage system. Journal of Materials Chemistry A, 2(1), 66-72. doi:10.1039/C3TA13775A.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-4B23-C
Abstract
The hydrogen storage system [MgH2–2 LiBH4] shows attractive properties such as favorable thermodynamics, high hydrogen capacity and reversibility. However, there exists an incubation period that amounts up to 10 hours in the dehydrogenation steps, which restricts this system as a practical material. In this study, the influences of stoichiometry and the nanoscale MgH2 were investigated for the system. Considerably shortened incubation times were achieved with deficit amounts of LiBH4 or by using nanoscale MgH2. In addition, the application of nanoscale MgH2 prevented or suppressed the formation of [B12H12]2− in the dehydrogenation, which is otherwise an issue concerning the re-cyclability.