Journal
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
Volume 7, Issue 9, Pages 3328-3331Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2007.679
Keywords
carbon nanotubes; TiO2 nanotubes; hybrid supercapacitor
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The rational selection and assembly of materials are central issues in the development of energy conversion and storage applications. Incorporating the utilization of carbon nanotubes cathode and TiO2 nanotubes anode in energy storage, a nonaqueous hybrid supercapacitor was developed in order to significantly increase the energy density of the supercapacitor. The electrochemical performance of the hybrid supercapacitor is characterized by charge/discharge test and cyclic voltam-mograms. According to the voltage value, the energy density of the asymmetric supercapacitor, by applying a potential varying from 0 to 2.8 V, is found to be 14.4 Wh/kg at upwards of 10 C, which is twice more than for the conventional symmetric supercapacitor utilizing carbon nanotubes, while maintaining desirable cycling stability and rate capability.
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