The present disclosure relates to electrodes for electrical tissue stimulation and to methods for electrical tissue stimulation and administration of substances to the tissue using the electrode. In particular, the disclosure teaches an electrode comprising a first conductive plate and a second conductive plate surrounding the first conductive plate, wherein the first conductive plate and the second conductive plate are separated from each other. Also taught is a method for inducing an electrical current in a tissue using an electrical tissue stimulation electrode, wherein an activation signal is applied to a first conductive plate of the electrode to generate an electric field that induces a current in the tissue and to apply an electrical potential to a second conductive plate of the electrode in order to obtain an electric potential differential with respect to the first conductive plate, the electric potential of the second conductive plate forcing the current induced by the first plate of conductive material to penetrate the tissue surface in contact with the conductive plates and prevent the induced current from flowing along the tissue surface. Also disclosed is a method for supplying an ionically charged substance using the electrode taught in this document, which comprises a step of disposing a substance on the tissue, wherein, when an electric field is applied with sufficient force and duration, the tissue cell walls become temporarily permeable and allow the substance to pass therethrough without damaging the tissue cells.La presente divulgación se relaciona con electrodos de estimulación eléctrica de tejidos y métodos de estimulación eléctrica de tejidos y de administración de sustancias a dicho tejido empleando el electrodo. Particularmente, enseña un electrodo que comprende: una primera placa conductora； y una segunda placa conductora que circunda a la primera placa conductora； donde la primera placa conductora y la segunda placa conductora están separ
