Graphite, intercalation compounds band structure

Holzwarth, N. A. W. 1992. Chapter 2 Electronic band structure of graphite intercalations compounds. In Zabel, H. and S. A. Solin (eds.), Graphite Intercalation Compounds II, pp. 7-52, Springer-Verlag, Berlin. 

Ohno, T. and H. Kamimura. 1983. Band structures and charge distributions along the c-axis of higher stage graphite intercalation compounds. J. Phys. Soc. Jpn. 52 223-232. 

Ohno, T. 1980. Electronic band structure of lithium-graphite intercalation compound C6Li../. Phys. Soc. Jpn. 49(Suppl. A) 899-902. 

The properties of the intercalation compound, potassium graphite, KCg, have been detailed in several review articles.34/35 The bonding in potassium graphite is described in terms of the limiting structure, K+Cg", and it is believed that the anion forms as a result of the transfer of an electron from the alkali metal to the conduction band of graphite. Novikov and Volpin35 have noted a similarity between aromatic radical-anions and alkali metal-graphite intercalation compounds. Their observation was based on inspection of reduction potentials of aromatic hydrocarbons relative to biphenyl, Table 9.2 ... 

First reported by Fredenhagen in 1926 F3, F4), the graphite-alkali-metal compounds possess a relative simplicity with respect to other intercalation compounds. To the physicist, their uncomplicated structure and well defined stoichiometry permit reasonable band-structure calculations to be made S2,12) to the chemist, their identity as solid, "infinite radical-anions frequently allows their useful chemical substitution for such homogeneous, molecular-basis reductants as alkali metal-amines and aromatic radical anions N2, B5). 

The structure of the intercalates are of considerable interest, in that the intercalate material enters the graphite layers to form in the final analysis, a one-to-one graphite-intercalate layer structure. Intermediate compounds involve inclusion of the material in, for example, a second, fourth, or fifth layer rather than dilution of the amount in the same layer. The chemical bonding in the compounds appears to be ionic and certainly involves electron transfer probably, for example, from potassium to the upper pi-band of graphite. ... 

---