Hydrogen storage capacity of catalytically grown carbon nanofibers.
In 1996, R. T. K. Baker, and N. M. Rodriguez claimed to have synthesized a new type of carbon nanofiber material capable of storing large amounts of hydrogen at room temperature and pressures above 100 bar, thus making it a powerful candidate for a very efficient energy storage system in mobile applications. Consequently, many scientists all over the world tried to test and verify these findings, however, with partly inconsistent results. We present here for the first time independent hydrogen storage measurements for several types of nanofibers, both synthesized by our group following precisely the specifications given in the literature as well as original samples supplied by Rodriguez and Baker for this study. The hydrogen storage capacities at room temperature and pressures up to 140 bar were quantified independently by gravimetric and volumetric methods, respectively. No significant hydrogen storage capacity has been detected for all carbon nanofibers investigated.
Rzepka
Matthias
M
Bavarian Center for Applied Energy Research (ZAE Bayern e.V.), Div. 1, 85748 Garching, Germany. Rzepka@muc.zae-bayern.de
Bauer
Erich
E
Reichenauer
Gudrun
G
Schliermann
Thomas
T
Bernhardt
Babette
B
Bohmhammel
Klaus
K
Henneberg
Eva
E
Knoll
Uta
U
Maneck
Heinz-Eberhard
HE
Braue
Wolfgang
W