Investigation of The Capacitive Behavior of Polyluminol on Carbon Nanotubes Electrodes

Jeanne N’Diaye*, Jin Hyun Chang, Keryn Lian

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A polymerized luminol carbon nanotube (CNT) composite electrode was developed via an in‐situ chemical polymerization (CpLum) process. Density functional theory (DFT) simulation suggested the luminol molecules were preferentially aligned flat on CNT. This was further demonstrated by morphological study which showed the CpLum wrapped around each CNT tube homogeneously with an average thickness of 4.5± 1.5 nm. The surface chemical analysis by X‐ray photoelectron spectroscopy (XPS) revealed a progressive increase in the nitrogen content and stabilized at 9%. Deconvolution of the high‐resolution N1s spectra suggested the presence of secondary and tertiary amine functional groups which are the signatures of polymerized luminol. The composite electrodes exhibited a pseudocapacitive‐like behavior with 3.5 times increase in charge storage. The contributions from the CpLum coating and CNT substrate were differentiated and were further deconvoluted to quantify the capacitive charge storage of each component. The thin CpLum coating contributed 70% of the total charge storage through pseudocapacitance. CpLum‐CNT electrodes also showed a high rate capability and good cycling stability, very promising for electrochemical capacitors.
Original languageEnglish
JournalChemElectroChem
Volume6
Issue number21
Pages (from-to)5454-5461
Number of pages9
ISSN2196-0216
DOIs
Publication statusPublished - 2019

Keywords

  • Polyluminol
  • In situ oxidative polymerization
  • Density functional calculations
  • Electrochemical capacitors
  • Charge contribution

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