Investigation of hydrogen storage capacity of various carbon materials |
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Authors: | W-C Xu K Takahashi Y Matsuo Y Hattori M Kumagai S Ishiyama K Kaneko S Iijima |
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Affiliation: | 1. Institute of Research and Innovation, 1201 Takada, Kashiwa 277-0861, Japan;2. Nuclear Science and Engineering Directorate, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata Shirane, Tokai-mura, Naka-gun, Ikaraki 311-1394, Japan;3. Department of Chemistry, Faculty of Science, Chiba University, 1-33 Yayoicho, Chiba 263-8522, Japan;4. Research Center for Advanced Carbon Materials, National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Tsukuba 305-8565, Japan |
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Abstract: | Hydrogen storage capacity of various carbon materials, including activated carbon (AC), single-walled carbon nanohorn, single-walled carbon nanotubes, and graphitic carbon nanofibers, was investigated at 303 and 77 K, respectively. The results showed that hydrogen storage capacity of carbon materials was less than 1 wt% at 303 K, and a super activated carbon, Maxsorb, had the highest capacity (0.67 wt%). By lowering adsorption temperature to 77 K, hydrogen storage capacity of carbon materials increased significantly and Maxsorb could store a large amount of hydrogen (5.7 wt%) at a relatively low pressure of 3 MPa. Hydrogen storage capacity of carbon materials was proportional to their specific surface area and the volume of micropores, and the narrow micropores was preferred to adsorption of hydrogen, indicating that all carbon materials adsorbed hydrogen gas through physical adsorption on the surface. |
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Keywords: | Hydrogen storage Carbon nanohorn Activated carbon Carbon nanotubes Graphitic carbon nanofiber |
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