Sodium cholate as efficient green reducing agent for graphene oxide via flow reaction for flexible supercapacitor electrodes

Kam Sheng Lau, Riski Titian Ginting, Sin Tee Tan, Siew Xian Chin, Sarani Zakaria, Chin Hua Chia

Research output: Contribution to journalArticle

Abstract

In this work, sodium cholate (NaC) was used as novel green reducing agent for graphene oxide (GO) reduction at 90 °C and short synthesis time using a continuous segmented flow reaction system. As a comparison, we had used the common reducing agent which is glucose to study its chemical and electrochemical properties. The morphologies of GO and reduced-graphene oxide (rGO) were characterized with X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FESEM), Fourier transformed infrared (FTIR), Raman and Ultraviolet–Visible (UV–Vis) spectroscopy analysis demonstrated that reduction of GO occurred. For electrochemical measurements, the rGO was cast on carbon cloth to investigate the electrochemical performance with cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) measurements. NaC assisted rGO (rGO–NaC) was able to achieve a specific capacitance up to 94 F g−1 at 0.1 A g−1 and remarkable capacitance retention of 103% after 10,000 cycles. A flexible test shows that rGO–NaC bendable at 0°–60°. These results demonstrate that rGO–NaC is promising as flexible supercapacitors electrodes.

Original languageEnglish
Pages (from-to)19182-19188
Number of pages7
JournalJournal of Materials Science: Materials in Electronics
Volume30
Issue number21
DOIs
Publication statusPublished - 1 Nov 2019

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Sodium Cholate
Graphite
Reducing Agents
electrochemical capacitors
Reducing agents
Oxides
Graphene
graphene
Sodium
sodium
Electrodes
electrodes
oxides
Capacitance
capacitance
Electrochemical properties
glucose
chemical properties
Field emission
Chemical properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

Sodium cholate as efficient green reducing agent for graphene oxide via flow reaction for flexible supercapacitor electrodes. / Lau, Kam Sheng; Ginting, Riski Titian; Tan, Sin Tee; Chin, Siew Xian; Zakaria, Sarani; Chia, Chin Hua.

In: Journal of Materials Science: Materials in Electronics, Vol. 30, No. 21, 01.11.2019, p. 19182-19188.

Research output: Contribution to journalArticle

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