An air battery is an electrochemical energy storage device that uses oxygen from the air as the cathode reactant. It consists of a porous positive electrode (typically made of carbon or metal oxides) and a negative electrode (usually made of lithium or other alkali metals) separated by an electrolyte. When the battery is discharged, oxygen from the air is reduced at the positive electrode, while lithium ions are oxidized at the negative electrode, releasing electrons that flow through an external circuit. The reverse process occurs when the battery is charged. Air batteries offer high energy density and low cost compared to conventional batteries, but they are still in the early stages of development and face challenges related to oxygen transport and electrode stability.
