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Nanostructured TiO2-coated activated carbon composite as an electrode material for asymmetric hybrid capacitors.

Authors
Type
Published Article
Journal
Journal of Nanoscience and Nanotechnology
1533-4880
Publisher
American Scientific Publishers
Publication Date
Volume
12
Issue
2
Pages
1292–1295
Identifiers
PMID: 22629941
Source
Medline
License
Unknown

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.

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