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M: Metallphysik
M 33: Postersitzung
M 33.37: Poster
Donnerstag, 29. März 2001, 15:15–19:00, Foyer S4, CCH
Hydrogen Storage in Ball-Milled Single Walled Carbon Nanotubes — •M. Haluška1, M. Hirscher1, M. Becher1, M. Hulman2, U. Dettlaff-Weglikowska2, S. Roth2 und J. Kečkeš3 — 1MPI für Metallforschung, Stuttgart — 2MPI für Festkörperforschung, Stuttgart — 3Erich Schmid Institut für Materialwissenschaft, Österreichische Akademie der Wissenschaften, Leoben
The possibility to use ball-milled single walled carbon nanotubes (SWNTs) for hydrogen storage is investigated. It is predicted that the ball-milling process can destroy ropes and open nanotubes, which may be essential to get an easy access to the tube interior. Changes of the structure caused by milling were detected by Raman, transmission electron microscopy, elemental analysis and X-ray diffraction measurements. The influence of milling conditions on hydrogen storage in SWNTs was investigated and compared with milled graphite and carbon nanofibers. The milling was performed in a planetary ball mill under argon or deuterium atmosphere for different times. Hydrogen storage was measured by thermal desorption spectroscopy up to 900 K utilizing mass spectrometry. Samples were loaded by hydrogen (deuterium) pressure of 0.8 bar either at room temperature or during cooling from room temperature to 77 K. Reproducibility and stability of the hydrogen storage were checked.
(We thank the BMB+F for financial support.)