In this chapter, existing theoretical approaches for describing the electrochemical behavior of microporous materials in faradaic processes will be treated. Such processes involve the transfer of electrons from/to a conducting electrode to/from electroactive species forming the framework of the porous material and/or attached as guests to this framework. The overall electrochemical process involves the propagation of the redox reaction across the solid via electron hopping between immobile redox centers. Charge conservation demands that this process be coupled with ion transport across the porous solid. Eventually, such charge transport processes can be restricted to the surface of the material particles.