“Zero-power autonomous devices will abound on the IoT of the future, and battery manufacturers are scratching their heads to come up with the best possible solution ensuring high energy and power density at miniature scale. A new material developed recently at Finland-based VTT shows promise, based on energy and power density of a supercapacitor depending on the surface area and conductivity of the solid electrodes. The size? So small it fits inside an IC. VTT’s research group has developed a hybrid nanomaterial electrode, which consists of porous silicon coated with a few nanometer thick titanium nitride layer by atomic layer deposition (ALD). This approach leads to a record large conductive surface in a small volume. Inclusion of ionic liquid in a micro channel formed in between two hybrid electrodes results in extremely small and efficient energy storage.”
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