Enhanced electrochemical properties of polyaniline-coated multiwall carbon nanotubes
MWNT (multiwall carbon nanotubes) was coated by using in-situ chemical polymerization of aniline monomer. Structure characterizations, such as N2 adsorption analysis and transmission electron microscopy, demonstrate that a thin layer of PANI (polyaniline) is well coated on the pore surface of MWNT. As evidenced by constant current charge-discharge test, specific capacitance of PANI-coated MWNT increases by a factor of 5 due to the incorporation of PANI onto the pore surface of MWNT. However, the capacitive behavior deteriorated due to the narrower pore size and extra faradiac resistance derived from PANI.
KeywordsConducting polymer Faradiac reaction Charge storage Cyclic voltammetry
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This work was supported by the Natural Science Foundation of Shandong Province (No.2003zx04), Sci-Tech Fund of Shandong University of Technology (No. 2006KJM17), Doctor Start-up Fund of Shandong University of Technology, and Initiative Research Group Fund of Shandong University of Technology.
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