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| The Electrochemical Hydrogen Storage Properties of Ordered Mesoporous Carbons |
| LIU Yu-Lin; LI Li-Xia; CHEN Xiao-Hong; SONG Huai-He |
| State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China |
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Abstract Ordered mesoporous carbon materials were successfully synthesized by an easy method of the carbonization of sulfuric-acid-treated silica/triblock copolymer/sucrose composites. The morphologies, structures and pore characteristics of the carbon materials were investigated by X-ray diffraction (XRD), nitrogen adsorption desorption and transmission electron microscopy (TEMand HRTEM) measurements. On the basis of comparing the surface areas and pore properties of two ordered mesoporous carbons obtained by changing the content of the reactants, their electrochemical hydrogen storage capacities were tested by Galvanostatic charge-discharge measurement. The results showed that the carbon material (C-P) with higher specific surface area (720 m2·g-1) and pore volume (0.86 cm3·g-1) had higher hydrogen storage capacity (70.1 mAh·g-1) than the carbon material (C-S) (64.1 mAh·g-1) with lower specific surface area (610 m2·g-1) and pore volume (0.66 cm3·g-1). Both of the two ordered mesoporous carbons exhibited higher hydrogen storage capacities than the single-walled carbon nanotubes (25.9 mAh·g-1). The cyclic voltammetry measurement indicated that the ordered mesoporous carbon electrode possessed higher electrochemical activity than single-walled carbon nanotubes electrode.
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Received: 30 January 2007
Published: 06 July 2007
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Corresponding Authors:
SONG Huai-He
E-mail: songhh@mail.buct.edu.cn
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