Layers graphene

In graphitic carbon, the in-plane stnrcture of graphene layers is almost the same as in graphite except the lateral extent of the layers inereases with heat-treatment... 

Figure 8 shows plotted versus P for all the carbons listed in Table 1 and for many others. There is a linear relationship betw cen g , and P which is well described by Q, =312(i-P) mAh/g. This implies that little or no lithium is able to intercalate between randomly stacked parallel layers [2]. Therefore we call the space between these adjacent randomly stacked graphene layers, blocked galleries . 

F ig. 29. Schematic graph showing the definition of the parameter, R, used to empirically estimate the fraction of single graphene layers in hard carbon samples. 

Received 16 September 1994 accepted in revised form 9 November 1994) Key Words - Buckeytubes nanotubes graphene layers... 

An important question relating to the structure of nanotubes is Are nanotubes made of embedded closed tubes, like "Russian dolls," or are they composed of a single graphene layer which is spirally wound, like a roll of paper Ijima et al. [2] espouse the "Russian doll" model based on TEM work which shows that the same number of sheets appear on each side of the central channel. Dravid et al. [4], however, support a "paper roll" structural model for nanotubes. 

Fig. 4. Singularities in MWCNT imaged by means of basal plane lattice fringes, (a) Straight ideal MWCNT. (b) Capped MWCNT. The tube closes progressively by clusters of 2-5 graphene layers. (c)(d) Bamboo-like compartments in straight tubes.

Apart from reactions with the electrolyte at the carbon surface, the irreversible specific charge is furthermore strongly affected by the possible co-intercalation of polar solvent molecules between the graphene layers of highly graphitic matrices [139]. This so-called "solvated intercalation reaction" depends (i) on the crystallinity and the morphology of the parent carbonaceous material, which will be discussed in Sec. 

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