Image: Energy Dome
Italian company Energy Dome have launched a large scale Co2 battery that can use captured carbon dioxide as a closed system battery. Electrical energy converts Co2 stored in a dome into compressed liquid, while storing the heat generated by the conversion. When the energy needs to be withdrawn, the stored heat is used to heat the compressed Co2 which turns a turbine to generate electricity and refill the Co2 dome. The battery can be built with existing materials and steel, and requires no rare-earth metals like checmical batteries.