Open AccessSimulations of a capacitor with graphene electrodes
Author(s) -
V Vachkov,
Zh Kiss’ovski
Publication year - 2022
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2240/1/012036
Subject(s) - graphene , capacitance , electrode , materials science , capacitor , parallelepiped , computation , dielectric , porosity , work (physics) , composite material , optoelectronics , nanotechnology , computer science , electrical engineering , mechanical engineering , voltage , geometry , physics , mathematics , engineering , algorithm , quantum mechanics
In this work, the behavior of a graphene-based capacitor was investigated by using an electromagnetic (EM) simulator. The graphene electrodes were simulated as a porous structure with a varying pore diameter as derived from experimental data. The main issue in modeling such a structure is the large number of objects with nano- or micro-dimensions (∼millions), which imposes a significant computation challenge for the simulator. A solution was developed by introducing an externally created matrix of the electrode with a fixed number of elements, which allowed the successful and accurate simulation of the complex porous-based structure. The pores of the electrodes are modeled as cylindrical holes in a solid graphene parallelepiped, while the capacitance is determined for different dimensions of pores of electrodes with a corresponding shape of the dielectric medium. The results obtained show a significant increase in the capacitance compared to a capacitor with flat metal electrodes.