Capacity single-walled

In studying processes of accumulation of the Frenkel defects, one uses three different types of simple models the box, continuum, and discrete (lattice) models. In the simplest, box model, which was proposed first in [22], one studies the accumulation of complementary particles in boxes having a certain capacity, with walls impenetrable for diffusion of particles among the boxes. The continuum model treats respectively a continuous medium the intrinsic volume of similar defects at any point of the space is not bounded. In the model of a discrete medium a single cell (e.g., crystalline lattice site) cannot contain more than one defect (v or i). 

The unique properties of carbon nanotubes include adsorbent characteristics that offer the prospect of yet more efficient hydrogen storage. Dillon et al. [64] used temperature programmed desorption to determine the hydrogen storage capacity of single-wall nanotubes. The authors predict a storage capacity of —50 kg Hi/m at ambient temperature and pressures for nanotubes with 20 A diameters. 

Ferrocene doping provides an electrochemical probe of the material during gelation, reporting in particular on the mobility of the probe as measured by the diffusion coefficient.133,134 If necessary the sol-gel material can be loaded with carbon powder to confer electrical conductivity (composite ceramic carbon electrodes, CCEs).135 Single-walled nanotubes in vanadia aerogels exhibit high capacities for lithium intercalation.136... 

Zambano, A.J., Talapatra, S., and Migone, A.D. (2001). Binding energy and monolayer capacity of Xe adsorbed on single-wall carbon nanotubes. Phys. Rev. B, 64, 075415 1-6. 

The amount of hydrogen that can be stored on these tubes has been debated. One report shows that maximum storage capacity for a single-walled carbon nanotube (SWCNT) [7] and multiwalled carbon nanotubes [8] is approximately 8% by weight [9], Multiwalled carbon nanotubes are a collection of concentric single-walled nanotubes [10] versus the one-dimensional single-walled tubes [11], SWCNTs have very high surface-to-volume ratios as well as uniform pores, which allow for capillary action and thus the ability to be filled by condensation. 

---