A cathode is an electrode where a reduction reaction occurs (gain of electrons for the electroactive species). In a battery, on the same electrode, both reactions can occur, whether the battery is discharging or charging. Cathode Diagram of a copper cathode in a galvanic cell (e.g. a battery). Positively charged cations move towards the cathode allowing a positive current i to flow out of the cathode . A cathode is the electrode from which a conventional current leaves a polarized electrical device such as a lead–acid battery. Cathode and Anode are commonly used terms in the context of electrochemistry, specifically in electrochemical cells like batteries and electrolytic cells. An anode is a negative or reducing electrode that releases electrons and oxidizes during an electrochemical reaction whereas a Cathode is a positive or oxidizing electrode. Learn the difference between cathode and anode, the two types of electrodes in polarized electrical devices. Find out how they behave in galvanic and electrolytic cells, electroplating, and corrosion.
