At a storage fair in Dusseldorf, researchers will present a ceramic high-temperature battery. Storage costs using sodium-nickel-chloride battery cells are said to be 50% lower than those of lithium-ion. The new product could halve the price of the cells used in it and requires no rare earth materials. Image: Fraunhofer IKTS From pv magazine Germany. The Fraunhofer Institute for Ceramic Technologies and Systems (IKTS) will present its newly developed “cerenergy” ceramic high-temperature battery for stationary battery storage at the Energy Storage Europe 2019 show, in Düsseldorf, Germany. Cerenergy is a 5 kWh battery with 20 cells, the fair’s organizer Messe Düsseldorf said. The costs at cellular level would be less than €100/kWh – about half those of lithium-ion battery cells. Cerenergy therefore sets a world record for sodium-nickel-chloride battery cells, according to Messe Düsseldorf, with the module said to be ready for production in the months ahead. The operating temperature of ceramic battery solutions is 300 degrees Celsius and it can be efficiently and economically operated using vacuum insulation, Fraunhofer IKTS said, meaning air conditioning is not necessary even in extreme ambient temperatures. Overall efficiency is reported to be more than 90% and energy density is 130 W/kg. “The sodium nickel chloride battery is essentially based on common salt – there is hardly a cheaper and more readily available raw material,” explained Roland Weidl, head of department at Fraunhofer IKTS. “And we also completely dispense with rare earths or other strategic raw materials.” The principle of the technology has been known since the 1990s and it has now become possible to adapt the technology for applications to PV home storage. Another essential component of the battery is a ceramic sodium ion-conductor based on aluminum oxide, nickel and iron. Energy Storage Europe 2019 will take place from March 12-14. Sandra is Senior Editor of pv magazine Deutschland. She has been reporting on solar since 2008. More articles from Sandra Enkhardt
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 .