Title

Multiwall Carbon Nanotube-Poly(4-Styrenesulfonic Acid) Supported Polypyrrole/Manganese Oxide Nano-Composites For High Performance Electrochemical Electrodes

Keywords

MnO electrochemical electrode 2; Polypyrrole; Rate capability; Supercapacitor

Abstract

Poly(4-styrenesulfonic acid) (PSS) dispersed multiwall carbon nanotubes (MWCNTs) are used as a support for polypyrrole (PPy)/MnO2 in a supercapacitor electrode. Synergetic interaction between polypyrrole and MnO2 significantly improves the electrical properties and the mechanical stability of the electrode that yields high rate capability. The (-SO3-) surface functionalities on MWCNT-PSS facilitate an ordered growth, and the molecular level dispersion of MnO2 in PPy matrix enhances the electrode performance. As an electrochemical electrode the MWCNT-PSS/PPy:MnO2 nano-composite exhibits ∼268 F g-1 specific capacitance at 5 mV s-1. The excellent rate capability and stability of the electrode is demonstrated by only 7% fade in the specific capacity at 100 mV s-1 (compared to the available capacity at 5 mV s-1) and 10% fade in the same after 5000 CV cycles. Specific capacitance of PPy:MnO2 component in the nano-composite is as high as 412 F g-1 in 0.5 M Na2SO4 electrolyte. Electrical conductivity of the MWCNT-PSS/PPy nano-composite is significantly improved upon inclusion of MnO2 in molecular level dispersion. © 2009 Elsevier B.V. All rights reserved.

Publication Date

2-15-2010

Publication Title

Journal of Power Sources

Volume

195

Issue

4

Number of Pages

1256-1262

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.jpowsour.2009.08.093

Socpus ID

72249107551 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/72249107551

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