Contribution of Dielectric Screening to the Total Capacitance of Few ...
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Contribution of Dielectric Screening to the Total Capacitance of FewLayer Graphene Electrodes Cheng Zhan and De-en Jiang* Department of Chemistry, University of California, Riverside, 92521, CA, USA *E-mail: [email protected]. Tel.: +1-951-827-4430
Figure S1. Excess charge distribution in few-layer graphene (FLG): (a) 1 layer; (b) 2 layer; (c) 4 layer; (d) 8 layer. Dashed lines show the positions of the graphene layers. Implicit electrolytes are on both sides (left and right) of the FLG which has a charge density of 9 𝞵C/cm2. S1
Figure S2. Fluid charge response at one electrode/electrolyte interface. The center of the surface graphene layer (ZC) is at zero position on the x-axis. The total charge on the electrode is 0.06 e and the few layer graphene is in contact with electrolyte on both sides. Fluid response charge equals to the integral of fluid response charge: Qelectrode = -Qfluid.
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Figure S3. The electrostatic potential drop, ∆𝜓 (𝑧), of the four-layer graphene electrode in two different solvation conditions with the surface charge density of 9 𝞵C/cm2. Vertical lines show the positions of the graphene layers, and the implicit electrolytes are on both sides (left and right) of the electrode. “eps” represents the bulk dielectric constant of the solvent and “c” is the concentration of ions in electrolyte, which influences the dielectric function and Debye screening length in the linear polarizable continuum model.
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Contribution of Dielectric Screening to the Total Capacitance of FewLayer Graphene Electrodes Cheng Zhan and De-en Jiang* Department of Chemistry, University of California, Riverside, 92521, CA, USA *E-mail: [email protected]. Tel.: +1-951-827-4430
Figure S1. Excess charge distribution in few-layer graphene (FLG): (a) 1 layer; (b) 2 layer; (c) 4 layer; (d) 8 layer. Dashed lines show the positions of the graphene layers. Implicit electrolytes are on both sides (left and right) of the FLG which has a charge density of 9 𝞵C/cm2. S1
Figure S2. Fluid charge response at one electrode/electrolyte interface. The center of the surface graphene layer (ZC) is at zero position on the x-axis. The total charge on the electrode is 0.06 e and the few layer graphene is in contact with electrolyte on both sides. Fluid response charge equals to the integral of fluid response charge: Qelectrode = -Qfluid.
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Figure S3. The electrostatic potential drop, ∆𝜓 (𝑧), of the four-layer graphene electrode in two different solvation conditions with the surface charge density of 9 𝞵C/cm2. Vertical lines show the positions of the graphene layers, and the implicit electrolytes are on both sides (left and right) of the electrode. “eps” represents the bulk dielectric constant of the solvent and “c” is the concentration of ions in electrolyte, which influences the dielectric function and Debye screening length in the linear polarizable continuum model.
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