Nanostructured TiO2-Coated Activated Carbon Composite as an Electrode Material for Asymmetric Hybrid Capacitors

Title
Nanostructured TiO2-Coated Activated Carbon Composite as an Electrode Material for Asymmetric Hybrid Capacitors
Authors
김상옥이중기
Keywords
TiO2; Activated Carbon; Spinel LiMn2O4; Asymmetric Hybrid Capacitor
Issue Date
2012-02
Publisher
Journal of nanoscience and nanotechnology
Citation
VOL 12, NO 2, 1292-1295
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/42236
ISSN
15334880
Appears in Collections:
KIST Publication > Article
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