Study of MWCNTS/PEDOT-PSS composite and MWCNTs/PTFE composite as electrodes for supercapacitors in aqueous solution

Qin Yang, Siu Kwong Pang, Kam Chuen Yung

Research output: Journal article publicationConference articleAcademic researchpeer-review

2 Citations (Scopus)

Abstract

In this paper, the electrochemical performance of the MWCNTs/PEDOT-PSS composite is investigated and compared with the MWCNTs/PTFE composite. The results show that the specific capacitance of the MWCNTs/PEDOT-PSS composite is 1.5 times higher than pure PEDOT-PSS after 100 CV cycles, and the MWCNTs/PEDOT-PSS composite exhibits a knee frequency of 15.9 Hz, which is 3 times larger than the MWCNTs/PTFE composite. The results of scan rate-dependent cyclic voltammetry reveal that the CV curves of the MWCNTs/PEDOT-PSS composite exhibit excellent rectangular shape at a scan rate of 800 mV s-1, while the MWCNTs/PTFE does not have a rectangular shape when the scan rate rises to 400 mV s-1. It is found that PEDOT-PSS can still facilitate the specific capacitance of MWCNTs, although it loses the electroacitve species during the charging and discharging cycling, when compared with PTFE. The MWCNTs/PTFE composite gains distinct chemical stability over the charging and discharging cycling.
Original languageEnglish
Pages (from-to)9-15
Number of pages7
JournalECS Transactions
Volume59
Issue number1
DOIs
Publication statusPublished - 1 Jan 2014
Event2014 Electrochemical Conference on Energy and the Environment, ECEE 2014 - Shanghai, China
Duration: 13 Mar 201416 Mar 2014

ASJC Scopus subject areas

  • Engineering(all)

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