Criteria and mechanism of capacity and pseudocapacity charge accumulation in activated carbon in view of its nanoporous structure and electronic structure

The relation between porous structure, electronic properties of carbonaceous material and the capacitance of its interface with an electrolyte is discussed. The sizes of the pores in which the processes of capacitive and pseudocapacitive charge accumulation dominate are determined. Theoretical analysis of the processes taking place on the nanoporous carbon||electrolyte interface has made it possible to recognize the intercalative nature of pseudocapacity and to find the criterion of its manifestation in the form of the formation of a continuous series of stable valency phases. Computer modeling of the processes enabled us to make up corresponding equivalent electric circuits.


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