Superior electric storage in de-alloyed and anodic oxidized Ti-Ni-Si glassy alloy ribbons

作者：Fukuhara M^*; Yoshida H; Sato M; Sugawara K; Takeuchi T; Seki I; Sueyoshi T

来源：Physica Status Solidi-Rapid Research Letters, 2013, 7(7): 477-480.

DOI：10.1002/pssr.201307195

• electric storage devices
• glassy alloys
• de-alloying
• anodic oxidization
• amorphous TiO2 surfaces

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 similar to 4.8 F (similar to 52.8 kF/cm(3)), on the basis of electric double layers, deep electronic trapping sites and Shottky barriers. Further gains could be attained with surface optimization.

• 出版日期2013-7