The staging kinetics of the ${\mathrm{H}}_2$${\mathrm{SO}}_4$-graphite intercalation compounds is studied by means of time- and space-resolved Raman scattering measurements. The motion of the phase boundary and the stage distribution is expressed as a function of the degree of supersaturation of the stage-1 phase which is in contact with the reservoir of intercalant (${\mathrm{H}}_2$${\mathrm{SO}}_4$ liquid). This staging kinetics is described in terms of one-dimensional diffusion in a multiphase system with moving phase boundaries. The present work also explains the time dependence of the domain-pattern formation in the intercalation process.

• Received 10 September 1987

DOI:https://doi.org/10.1103/PhysRevB.37.3141