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Hydrogen Storage using Carbon Materials at Room Temperature

Published online by Cambridge University Press:  26 February 2011

H. Kajiura ,
S. Tsutsui ,
K. Kadono ,
Y. Murakami ,
M. Kakuta  and
M. Ata
H. Kajiura
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan Department of Physics, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, IL 61801–3080, U.S.A.
S. Tsutsui
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan
K. Kadono
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan
Y. Murakami
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan
M. Kakuta
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan
M. Ata
Affiliation:
Sony Corporation, 2–1–1 Shinsakuragaoka, Hodogaya-ku, Yokohama-shi, Kanagawa, 240–0036, Japan
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Abstract

The hydrogen adsorption capacity of commercially available carbon materials with different nanostructures was measured at room temperature using an apparatus based on a volumetric method with an error of less than 0.04 wt% per one gram of sample. The obtained results suggest that nanosutures of the sample influence the hydrogen adsorption capacity. To confirm this hypothesis, we prepared nanostructured graphite from graphite powder using a mechanical milling process at a pressure of 2.0 × 10−4 Pa. The untreated graphite adsorbed 0.02wt% of hydrogen at 6 MPa at room temperature, while 0.20 − 0.25 wt% of hydrogen can be repeatedly adsorbed by the nanostructured graphite. Measurements of the hydrogen adsorption rate at constant pressure and pore-size distribution imply that the hydrogen molecules are adsorbed through a diffusion process in pores with a diameter less than 1 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 801: Symposium BB – Materials and Technologies for a Hydrogen Economy , 2003 , BB5.2
Copyright
Copyright © Materials Research Society 2004

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References

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