Fraunhofer Institute for Ceramic Technology and Science ( IKTS ) has developed a low - cost , ceramic high - temperature battery for stationary storage . The 5 ##V Cerenergy battery relies on a combination of sodium and potassium , eliminating the need for costly rare earth minerals , and has a cellular cost of € 100 / kWh – half that of lithium - ion batteries . IKTS said the module achieved a 90 % efficiency with an energy density of 130 W / kg , and will be ready for production in the coming months .
Fraunhofer Institute for Ceramic Technologies and Systems (IKTS) has developed a low-cost, ceramic high-temperature battery for stationary storage. The 5 kWh Cerenergy battery relies on a combination of sodium nickel chloride, eliminating the need for costly rare earth minerals, and has a cellular cost of €100/kWh – half that of lithium-ion batteries. IKTS said the module achieved a 90% efficiency with an energy density of 130 W/kg, and would be ready for production in the coming months.