Ti-Ni-Si glassy alloy supercapacitors, devices that store electric charge on their TiO2 surfaces that contain many nanometer-sized cavities, display many advantages over other power-source technologies. The use of de-alloying and anodic oxidization methods has made possible the synthesis of a TiO2 surface accessible to electron trapping. Until recently, no studies have addressed the "dry" electric storage in light glassy alloys. Our device realizes AC electric storage from 193 to 453 K with a voltage variation from 10 to 150 V, and DC capacitance of ∼4.8 F (∼52.8 kF/cm3), on the basis of electric double layers, deep electronic trapping sites and Shottky barriers. Further gains could be attained with surface optimization.
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