An electrochemical cell is a device that converts chemical energy into electrical energy through redox reactions. It consists of two electrodes, an anode and a cathode, immersed in an electrolyte solution. At the anode, oxidation occurs, releasing electrons, while at the cathode, reduction takes place, consuming those electrons. This flow of electrons generates an electric current. There are two main types of electrochemical cells: galvanic cells and electrolytic cells. Galvanic cells generate electricity spontaneously, while electrolytic cells require an external power source to drive the chemical reactions. Common applications include batteries and electroplating processes.