Effect Of Pore Morphology On The Electrochemical Properties Of Electric Double Layer Carbon Cryogel Supercapacitors

摘要

In this study, a group of carbon cryogels have been synthesized using resorcinol formaldehyde as precursors, and altered via catalysis and activation, to obtain varied nanostructures and pore size distributions. To understand the relation between structure and electrochemical properties, an alternate approach to de Levi's cylindrical pore, transmission line method was utilized. Using electrochemical impedance spectroscopy, the capacitor can be studied as a dielectric system composed of a porous electrode and the electrolyte (tetraethylammonium tetrafluoroborate in propylene carbonate). The complex capacitance and power are- used to study the behavior of the system below the relaxation frequency f_0 (φ=-45°). Therefore, the relaxation of the capacitor system at the low frequency range, f