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Hydrogen storage in single- and multi-walled carbon nanotubes and nanotube bundles

Hamidi, S ; Sharif University of Technology | 2011

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  1. Type of Document: Article
  2. Publisher: 2011
  3. Abstract:
  4. This article describes the hydrogen storage capacity in different carbon nanotubes. The hydrogen storage capacities in the armchair, zigzag, and chiral nanotubes are investigated. The hydrogen storing capacities as a function of the carbon nanotube (CNT) diameter are investigated for the single-walled (SWNT), multi-walled (MWNT), and CNT bundles and results are compared. Hydrogen storage capacity in SWNTs is increased by increasing the nanotube diameter. For diameter d=0.3887 nm of (5,0) CNT the hydrogen capacity is 0.99%, while for the (17,17) SWNT with a diameter d=2.289 nm the capacity is increased to 5.06%. In comparison of different MWNTs for a common external diameter d=1.6064 nm the hydrogen storage in the MWNT with 5 shells is 1.15%, while with 10 shells the capacity is reduced to 0.66%. Thus higher shells in the MWNTs structure causes reduction in the hydrogen storage capacity. The effect of the number of the SWNTs that forms the CNT bundle is also investigated for hydrogen storage. For the CNT bundle consisting of 7 SWNTs (17,17) the hydrogen storage capacity is 2.95%, while for the CNT bundle consisting of 217 similar SWNTs the storage capacity is reduced to 0.61%
  5. Keywords:
  6. Atom ; Capacity ; Carbon ; Hydrogen ; Nanotube
  7. Source: Australian Journal of Basic and Applied Sciences ; Volume 5, Issue 7 , 2011 , Pages 483-490 ; 19918178 (ISSN)