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Look up in the sky, it's a bird, it's a plane, it's ... a 20,000 cubic-meter power-generating airship, floating 6,560 ft (2,000 meters) above the ground. Introducing the S2000 stratospheric airborne wind energy system (SAWES), the world's first ...

A team at Germany's Fraunhofer Institute for Ceramic Technologies and Systems (IKTS) has developed a new type of sodium-ion battery that uses lignin as a key electrode material.