In contrast, PNF demonstrates superior charge storage capabilities compared to PN and PNZ, with a significantly higher specific capacitance of 475.9 F g -1 and a good energy and power density, with values of 65. The performance of electrochemical devices involves analyzing various types of losses, including charge transport losses, charge transfer losses due to electrochemical reactions, and losses attributed to reactant diffusion. Electrochemical impedance spectroscopy enables the characterization of these processes individually by separating them by their respective time constants, thus showing their individual contributions to the total loss. Figure illustrates the Nyquist plots obtained from measurements conducted on PN and PN composite-coated electrodes at OCP.