A Li-CO2 battery consists of a non-aqueous electrolyte and electrodes made of lithium and a porous material. The lithium serves as the anode, while the porous material serves as the cathode, where carbon dioxide is reduced to lithium carbonate during the battery discharging process.
In addition to making batteries lighter, the process also directly uses carbon dioxide gas, captured either directly from the air or through carbon capture technologies deployed at various manufacturing facilities. This makes it a vital resource for reducing carbon emissions on Earth.