Regensburg 2016 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 26: Poster session II
MM 26.30: Poster
Dienstag, 8. März 2016, 18:30–20:30, Poster B3
Thermal decomposition of sodium borohydride covered with polyethyleneimine — •Hendrik Rahmann1, Christian Sternemann1, Sebastian Dahle2, Georgia Sourkouni2, Christos Argirusis2,3, Karin Esch1, Florian Wirkert1, Holger Göhring1, Wolfgang Maus-Friedrichs2, and Metin Tolan1 — 1Twchnische Dortmund, 44221 Dortmund, Germany — 2Technische Universität Clausthal, 38678 Clausthal-Zellerfeld, Germany — 3National Technical University of Athens, 15773 Zografou/Athens, Greece
In order to use hydrogen as an energy carrier in the future as part of real-life technologies, efficient hydrogen storage media are necessary. Borohydrides are an attractive hydrogen storage material because of their low mass and high hydrogen density. Here, one of the promising candidates is sodium borohydride (NaBH4) if its degradation at atmosphere can be hindered and its hydrogen release temperature can be lowered. To achieve this goal, NaBH4 can be covered with a polyethyleneimine (PEI) layer [1]. We performed in situ X-ray diffraction (XRD) measurements at beamline BL9 of DELTA synchrotron radiation source using native and PEI-coated NaBH4 while heating the samples from 30∘C to 720∘C. The crystalline reaction products at different temperatures were determined in order to compare both hydrogen release paths. Moreover we applied quadrupole mass spectrometry and differential scanning calorimetry to characterize changes in the hydrogen desorption path of NaBH4 induced by PEI coverage.
[1] S. Dahle et al., RSC Adv. 4, 2628 (2014).