Thermally exfoliated graphite

Thermally exfoliated graphite (TEG) and their composites from Superior Graphite (Chicago) and TEGs prepared from Ukrainian graphite. 

Our experiments, as well as analysis of the proposed theoretical model for a generalized system of porous electrode "active material - carbon additive" proved that thermally exfoliated graphite (TEG) can be one of the most effective conductive additive and structural support for the different new and existing active materials. The reason for such wide application of TEG is a following unique complex of TEG properties low density, relatively high conductivity and stability to electrochemical oxidation. 

The thermally exfoliated graphite oxide can be dispersed in a wide variety of polymers, e.g., polyolefins, polyesters, nylons, polystyrenes, and polycarbonates, and also in elastomers. It is also possible to compoimd the thermally exfoliated graphite oxide into the monomeric precursors of these pol5miers and to effect the polymerization in the presence of the thermally exfoliated graphite oxide nanofiller. To formulate a conductive ink, solvents are added, such as N-methyl-2-pyrrolidone, dimethylformamide, tetrahydrofuran, and others (20). 

R.K. Prud Homme and LA. Aksay, Conductive ink containing thermally exfoliated graphite oxide and method a conductive circuit using the same, US Patent 8 048 214, assigned to The Trustees of Princeton University (Princeton, NJ), November 1, 2011. 

Purified, thermally exfoliated natural flake graphite, Superior Graphite Co. (USA)... 

Also of current technological interest is exfoliated graphite, a form of graphite produced from intercalation compounds submitted to a thermal shock such as passing through a hot flame. The intercalate... 

Fig. 1 TEM images of graphene obtained by (a) reductive pyrolysis of camphor (CG), (b) thermal exfoliation of graphitic oxide (EG), (c) thermal conversion of nanodiamond to grapbene (DG) and (d) arc evaporation of SiC (SG),...

The Broekhoff-van Dongen isotherm allows for multilayer adsorption with lateral interactions and predicts the possibility of 2D phase transitions in each layer [17]. The most spectacular evidence for 2D phase transitions concerns the adsorption of heavy noble gases on highly homogeneous non-polar surfaces of low atomic weight (typically, exfoliated graphite obtained by thermal dissociation of its intercalation compound with FeCla). This situation guarantees that the adsorbate-adsorbate interaction prevails on ad-sorbent-adsorbate interaction and makes it possible the observation of phase transitions in each layer. See Ref. [18] for a short overview of this subject. 

Kim, I. H., and Jeong, Y G. (2010], Polylactide/exfoliated graphite nanocomposites with enhanced thermal stability, mechanical modulus, and electrical conductivity. J. Polym. Sci. Polym. Phys., 8, pp. 850-858. 

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