Faradaic and Non-Faradaic Charge Transfer Mechanism for Energy Storage Systems

Faradaic and non-Faradaic charge transfer mechanisms play an essential role in energy storage and conversion processes. The faradaic charge transfer mechanism involves electrochemical reactions that result in the exchange of electrons between the electrode and the electrolyte. Whereas the non-faradaic charge transfer mechanism involves charge storage without significant chemical reactions at the electrode-electrolyte interface. In this work we report a hybrid nanocomposite material operating on both Faradaic and non-Faradaic mechanisms simultaneously. The hybrid electrodes containing conducting polymer and graphene oxide were synthesized using electropolymerization process and the effects of graphene oxide (GO) on polypyrrole were studied. Details of electrode synthesis, electrochemical testing, and fabrication of device as a button cell will be discussed. Polypyrrole and graphene oxide (PPy/GO) films were tested using electrochemical methods such as cyclic voltammetry (CV), Electrochemical Impedance Spectroscopy (EIS), and Galvanostatic Charge Discharge (GCD) to assess electrode performance. The results generated from such tests will provide insights into the ohmic, non-ohmic, and Warburg resistances along with specific capacities and charge discharge behavior of the electrodes. These insights will be discussed and compared with electrodes with different levels of graphene oxide.