An electrode is an electrical conductor that makes contact with a nonmetallic part of a circuit. Learn about the history, classification and applications of electrodes in electrochemical cells, batteries and electron transfer reactions. An electrode is a conductor that passes an electrical current from one medium to another, usually from a power source to a device or material. It can take a number of different forms, including a wire, a plate, or a rod, and is most commonly made of metal, such as copper, silver, lead, or zinc, but can also be made of a non-metallic substance that conducts electricity, such as graphite. Electrodes are used in welding, electroplating, batteries, medicine, and in industry for processes ... Electrodes The substances that are used to make electrical contact with non-metallic parts are known as electrodes. Electrodes are electrical conductors, their purpose is to carry electric current to the non-metallic part in an electrolyte, semiconductor or in vacuum. They are the main component of an electrochemical cell. Electrodes consist of two parts- an anode and a cathode. The anode is the negative part of the electrode, it is also known as reducing electrode, it releases electrons to ... An electrode is a piece of wire or rod (of a metal or alloy), with or without flux covering, which carries current for welding. At one end it is gripped in a holder and an arc is set up at the other end.