Influence of silver-decorated multi-walled carbon nanotubes on electrochemical performance of polyaniline-based electrodes

Journal Article · Sat Oct 15 04:00:00 EDT 2011 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2011.08.010· OSTI ID:21580029

Kim, Ki-Seok ^[1]; Park, Soo-Jin ^[1]

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1. Department of Chemistry, Inha University, Incheon 402-751 (Korea, Republic of)

In this work, silver (Ag) nanoparticles were deposited on multi-walled carbon nanotubes (MWNTs) by chemical reduction while Ag-decorated MWNTs (Ag-MWNTs)/polyaniline (PANI) composites were prepared by oxidation polymerization. The effect of the Ag incorporated into the interface of the composites on the electrochemical performance of the MWNTs/PANI was investigated. It was found that highly dispersed Ag nanoparticles were deposited onto the MWNTs, and the Ag-MWNTs were successfully coated by PANI. According to cyclic voltammograms, the Ag-MWNTs/PANI exhibited significantly increased electrochemical performances compared to MWNTs/PANI and the highest specific capacitance obtained of MWNTs/PANI and 0.15 M Ag-MWNTs/PANI was 162 F/g and 205 F/g, respectively. This indicated that Ag nanoparticles that were deposited onto the MWNTs caused an enhanced electrochemical performance of the MWNTs/PANI due to their high electric conductivity, which resulted in an increase of the charge transfer between the MWNTs and PANI by a bridge effect. - Graphical Abstract: The current density of MWNTs/PANI increased with increasing the Ag concentration due to the bridge effect of Ag nanoparticles incorporated between MWNTs and PANI. Highlights: > We fabricated the silver nanoparticle decorated MWNTs/PANI composites. > Ag-MWNTs/PANI showed enhanced electrical conductivity compared to MWNTs/PANI. > Specific capacitance (205 F/g) of Ag-MWNTs/PANI was higher than that of MWNTs/PANI. > Ag nanoparticles serve as catalytic materials at interface between MWNTs and PANI.

• OSTI ID: 21580029
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 10 Vol. 184; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CARBON
CHEMICAL REACTIONS
CHEMISTRY
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROCHEMISTRY
ELEMENTS
INTERFACES
MATERIALS
METALS
NANOSTRUCTURES
NANOTUBES
NONMETALS
OXIDATION
PARTICLES
PHYSICAL PROPERTIES
POLYMERIZATION
REDUCTION
SILVER
TRANSITION ELEMENTS