Elektrod Superkapasitor daripada Komposit Karbon Teraktif dan Grafen dengan Perekat PVDF-HFP

Translated title of the contribution: Supercapacitor electrode from activated carbon and graphene composite with PVDF-HFP binder

Mohamad Redwani Mohd Jasni, Mohamad Deraman, Zalita Zainuddin, Chin Hua Chia, Ramli Omar

Research output: Contribution to journalArticle

Abstract

Electrochemical double-layer supercapacitor electrodes were produced using an activated carbon monolith (ACM) powder as the precursor and graphene as the additive. Electrodes were prepared by mixing ACM powder and graphene with different weight percentage (0, 5, 10, 20 and 40 wt. %) which were added with poly-vinylidene fluoride-hexafluoropropylene (PVDF-HFP) solution as a binding agent and carbon black as a conductive agent. Physical characterization was carried out on the electrodes by using an X-ray diffraction (XRD) and adsorption-desorption isotherms methods. Supercapacitor cells performance using 6 M KOH aqueous electrolyte were tested using electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic charge discharges (GCD) methods. Supercapacitor cell with 5 wt. % graphene additive (KMT05) was found to have the highest specific capacitance (172 F g-1), highest specific energy (11 Wh kg-1), highest specific power (196.13 W kg-1), lowest response time (2 s), and lowest charge transfer resistance (2.4 O) compared to other cells. This showed that 5 wt. % graphene additive is optimum for improving the cell performance. These results are compatible with the larger microcrystallites size and specific surface area of KMT05X have a larger compared to the KMT with no graphene additive (KMT00X).

Original languageMalay
Pages (from-to)407-417
Number of pages11
JournalSains Malaysiana
Volume48
Issue number2
DOIs
Publication statusPublished - 1 Feb 2019

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Graphite
Activated carbon
Binders
Electrodes
Composite materials
Powders
Soot
Electrochemical impedance spectroscopy
Specific surface area
Electrolytes
Cyclic voltammetry
Isotherms
Charge transfer
Desorption
Capacitance
Supercapacitor
polyvinylidene fluoride
Adsorption
X ray diffraction

ASJC Scopus subject areas

  • General

Cite this

Elektrod Superkapasitor daripada Komposit Karbon Teraktif dan Grafen dengan Perekat PVDF-HFP. / Jasni, Mohamad Redwani Mohd; Deraman, Mohamad; Zainuddin, Zalita; Chia, Chin Hua; Omar, Ramli.

In: Sains Malaysiana, Vol. 48, No. 2, 01.02.2019, p. 407-417.

Research output: Contribution to journalArticle

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