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Theoretical Prediction of Capacitance of Bilayer Graphene Flakes
Author(s) -
Salehi Seyed Reza,
Azami Seyed Mohammad
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202000201
Subject(s) - capacitance , graphene , materials science , dielectric , bilayer graphene , condensed matter physics , voltage , capacitor , bilayer , supercapacitor , quantum capacitance , inverse , electrode , nanotechnology , optoelectronics , electrical engineering , chemistry , physics , membrane , geometry , biochemistry , engineering , mathematics
Electric double layer capacitors (EDLCs) have been known as energy storage device and different materials have been used as EDLC electrode materials. Recently, graphene has been considered as one of the most promising materials for use in EDLC structure. In this research, a theoretical study on bilayer graphene (as an EDLC with vacuum dielectric) in two symmetries (D 2h and D 6h ) with different distances and applied voltages is done, where the charge separation among a bilayer graphene structure is calculated by electron deformation orbital theory. Although it was found that capacitance is almost independent of applied voltage in constant distances, the relationship between capacitance and inverse of distance was nonlinear in the cases of constant voltages. The structure change from D 2h to D 6h did not affect the specific capacitances, significantly, although the areal capacitance of D 2h structure was greater than that of D 6h structure.