The pseudospin-electron model with two orbital electron states per site is considered in this work. This model can be employed for the description of the intercalation of ions in crystals. The pseudospin formalism is used for describing the interaction of electrons with ions. The thermodynamics of the model is studied in the mean field approximation. The possibility of the phase transitions connected with the change of the concentration of intercalated ions and significant increase of electrostatic capacity of the system is analyzed.
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