Title

Multiwall Carbon Nanotube Supported Poly(3,4-Ethylenedioxythiophene)/Manganese Oxide Nano-Composite Electrode For Super-Capacitors

Keywords

Charge storage; CNT/MnO nano-composites 2; Electrochemical electrodes; Specific capacitance

Abstract

MWCNT-PSS/PEDOT/MnO2 nano-composite electrodes were fabricated by generating pseudo-capacitive poly(3,4-ethylenedioxythiophene) (PEDOT)/MnO2 nano-structures on poly(styrene sulfonate) (PSS) dispersed multiwalled carbon nanotubes (MWCNTs). PSS dispersed MWCNTs (MWCNT-PSS) facilitated the growth of PEDOT and MnO2 into nano-rods with large active surface area and good electrical conductivity. The ternary MWCNT-PSS/PEDOT/MnO2 nano-composite electrode was studied for the application in super-capacitors, and exhibited excellent capacitive behavior between -0.2 V and 0.8 V (vs. saturated Ag/AgCl electrode) with high reversibility. Specific capacitance of the nano-composite electrode was found as high as 375 F g-1. In contrast, specific capacitance of MWCNT-PSS/MnO2 and MWCNT-PSS nano-composite electrodes is 175 F g-1 and 15 F g-1, respectively. Based on cyclic voltammetric studies and cycle-life tests, the MWCNT-PSS/PEDOT/MnO2 nano-composite electrode gave a highly stable and reversible performance up to 2000 cycles. Our studies demonstrate that the synergistic combination of MWCNT-PSS, PEDOT and MnO2 has advantages over the sum of the individual components. © 2009 Elsevier Ltd. All rights reserved.

Publication Date

11-30-2009

Publication Title

Electrochimica Acta

Volume

54

Issue

27

Number of Pages

7148-7155

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.electacta.2009.07.048

Socpus ID

69949136644 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/69949136644

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