Highly Conductive, Capacitive, Flexible and Soft Electrodes Based on a 3D Graphene-Nanotube-Palladium Hybrid and Conducting Polymer

The article reports on a highly conductive, capacitive, flexible and soft electrode based on three-dimensional graphene-nanotube-palladium nanostructures and Poly(3,4-ethylenedioxythiophene): Polystyrene sulfonate (PEDOT:PSS) conducting polymer. The PEDOT: PSS conducting polymer was used not only to intimately connect the graphene-based 3D flakes, but also to enhance the electronic transport of the original electrode without additional electrical connection parts such as a metallic current collector. Two different viewpoints can be found in the literature. Some authors have explained that non-ideal behavior is related to the roughness of the electrode. In such a theory, an increased surface roughness leads to a current density distribution along the surface and thus a distribution of the electrical double-layer charging times.