Abstract
A continuum mechanics model is established for hydrogen storage in single- and multi-wall carbon nanotubes (CNTs) and the bundle of single-wall CNTs. The model accounts for the deformation of CNTs, and van der Waals interactions among hydrogen molecules and between hydrogen and carbon atoms. The analytical expressions of hydrogen storage (number of hydrogen molecules per unit volume) in CNTs are obtained, and are validated by atomistic simulations. CNTs are categorized as tiny, small, medium and large CNTs; tiny CNTs cannot achieve the goals of hydrogen storage (62 kg/m3 and 6.5 wt% of hydrogen set by the US Department of Energy) without fracture; small CNTs are strained during hydrogen storage; medium CNTs can achieve the above goals without the strain and do not self collapse; and large CNTs may self collapse upon the release of hydrogen.
Original language | English (US) |
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Pages (from-to) | 3224-3241 |
Number of pages | 18 |
Journal | Journal of the Mechanics and Physics of Solids |
Volume | 56 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2008 |
Funding
B.L. acknowledges the support from National Natural Science Foundation of China (Grant nos. 10542001, 10702034 and 10732050). K.C.H. acknowledges the support from National Basic Research Program of China (973 Program) Grant no. 2007CB936803. Y.H. acknowledges the support from the NSF through Nano-CEMMS (Grant no. DMI03-28162) at the University of Illinois and ONR Composites for Marine Structures Program (Grant no. N00014-01-1-0205, Program Manager Dr. Y.D.S. Rajapakse). The supports from the NSFC and Ministry of Education of China are also acknowledged.
Keywords
- Analytical solution
- Atomistic simulations
- Carbon nanotube
- Continuum model
- Hydrogen storage
ASJC Scopus subject areas
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering