Employment of nanostructured metal oxide materials for asymmetric hybrid capacitor applications
- Employment of nanostructured metal oxide materials for asymmetric hybrid capacitor applications
- 김상옥; 이중기
- TiO2; Activated carbon; Spinel LiMn2O4; Asymmetric hybrid capacitor
- Issue Date
- International Union of Materials Research Societies - International Conference on Electronic Materials 2010 (IUMRS-ICEM 2010)
- A nanostructured TiO2-coated activated carbon (TAC) composite was synthesized by a modified sol-gel reaction and employed it as a negative electrode active material for an asymmetric hybrid capacitor. The structural characterization showed that the TiO2 nano-layer was deposited on the surface of the activated carbon and the TAC composite has a highly mesoporous structure. The evaluation of electrochemical characteristics of the TAC electrode was carried out by galvanostatic charge/discharge cycling tests and electrochemical impedance spectroscopy. The obtained specific capacitance of the TAC composite was 42.87 F/g, which showed by 27.1% higher than that of the activated carbon (AC). The TAC composite also exhibited an excellent cycle performance and kept 95% of initial capacitance over 500 cycles.
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