Air-stable metal hydride-polymer composites of Mg(NH$_{2}$)$_{2}$–LiH and TPX™
| Autor: | Michael T. Wharmby, Prokopios Georgopanos, Hujun Cao, Fynn Weigelt, Martin Dornheim, Volker Abetz, Anna-Lisa Chaudhary, Volkan Filiz, Thomas Klassen, Giovanni Capurso, Claudio Pistidda, Jo-Chi Tseng |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Hydrogen Materials Science (miscellaneous) Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology reactive hydride composite air stability hydrogen storage polymethylpentene 010402 general chemistry 01 natural sciences Redox Metal Hydrogen storage ddc:620.11 Moisture Renewable Energy Sustainability and the Environment Hydride Thermal decomposition 021001 nanoscience & nanotechnology Light metal 0104 chemical sciences Fuel Technology Nuclear Energy and Engineering chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology ddc:600 |
| Zdroj: | Materials today 10, 98-107 (2018). doi:10.1016/j.mtener.2018.08.008 Cao, H.; Georgopanos, P.; Capurso, G.; Pistidda, C.; Weigelt, F.; Chaudhary, A.-L.; Filiz, V.; Tseng, J.-C.; Wharmby, M.T.; Dornheim, M.; Abetz, V.; Klassen, T.: Air-stable metal hydride-polymer composites of Mg(NH2)2–LiH and TPX™. In: Materials Today : Energy. Vol. 10 (2018) 98-107. (DOI: /10.1016/j.mtener.2018.08.008) |
| ISSN: | 2468-6069 |
| Popis: | Materials today 10, 98 - 107 (2018). doi:10.1016/j.mtener.2018.08.008 Light metal hydrides are prone to react with oxygen and/or water to produce oxides and/or hydroxides leading to reduction of hydrogen capacities, and deterioration of the hydrogen storage properties. It is therefore critical to address these issues when the materials are to be exposed to air or moisture. In this work, the combination of light metal hydrides, Mg(NH$_{2}$)$_{2}$–nLiH with polymethylpentene (TPX™), an air/moisture protective barrier is presented. It was found that the fabricated composites exhibit significant improvement of the metal hydrides stability in air. No oxidation reactions in air can be proven even after air exposure for 90 min. Extending the air-exposure time to 12 h, the reversible hydrogen capacities of these composites are much higher and more stable than they are in the case of the pure metal hydrides. In comparison to the pure metal hydrides, the composites retain the same hydrogen loading capacities and kinetic properties, with respect to the metal hydrides contents. Further, in situ synchrotron radiation powder X-ray radiation diffraction (SR-PXRD) experiments reveal that the thermal decomposition reaction pathways of the 90 min air-exposed composites are the same under air or H$_2$ atmosphere. Moreover, morphology analysis confirms that the metal hydrides remain stable in the polymeric matrix and the three-dimensional integrity is retained, even after performing tens of de/re-hydrogenation cycles. The present study shows a promising way to fabricate air-stable metal hydride-polymer composite hydrogen storage materials that can be handled in ambient conditions. Published by Elsevier Ltd., Amsterdam [u.a.] |
| Databáze: | OpenAIRE |
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