What is the term for the positive electrode of a battery?

The positive electrode of a battery is referred to as the cathode. In the context of electrochemical cells, the cathode is the electrode where reduction occurs, meaning it gains electrons during the electrochemical reaction. In a typical battery discharge, the cathode allows the flow of electrons into the external circuit and, as a result, is positively charged relative to the anode.

In various types of batteries, such as lithium-ion batteries and alkaline batteries, the configuration of electrodes can change based on the chemical reactions taking place. However, the fundamental definition remains that the cathode is the positive side during discharging, while the anode is the negative side where oxidation occurs.

Recognition of these terms is essential for understanding how batteries operate internally and their associated electrochemical processes.