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Electrochemical performance of various activated carbon-multi-walled carbon nanotubes symmetric supercapacitor electrodes in aqueous electrolytes

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2022, 32(6), pp.1481-1505
  • DOI : 10.1007/s42823-022-00386-y
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : May 16, 2022
  • Accepted : July 27, 2022
  • Published : October 1, 2022

Thillaikkarasi Dhanapal 1 Karthikeyan Srinivasan 1 Ramesh Rajendran 2 Sengodan Prabhu 3 Kavitha Dhamodaran 4 Muthubalasubramanian Malarvizhi 5

1PG and Research Department of Chemistry, Chikkanna Government Arts College, Tirupur, Tamil Nadu,
2Periyar University
3Saveetha University
4Department of Chemistry, Dr. M. G. R. Educational and Research Institute, Adayalampattu, Chennai, Tamil Nadu
5Department of Physics, K.S.Ranagasamy College of Technology, Tiruchengode, Nammakkal (Dt), Tamil Nadu

Accredited

ABSTRACT

An electrical double-layer capacitor is fabricated with biomass-derived activated carbon (AC) and multi-walled carbon nanotubes (MWCNTs), which are synthesized from Pongamia pinnata fruit shell and its seed oil, respectively. The activated carbon is produced by the chemical activation process at varying carbonization temperatures from 600 to 900 °C for 5 h at a rate of 10 min in an N2 atmosphere. The surface area of activated carbon and MWCNTs is 1170 m2 g−1 and 216 m2 g−1, respectively. The total pore volumes of activated carbon and MWCNTs are 1.51 cm3 g−1 and 0.5907 cm3 g−1, respectively. The as-prepared AC and MWCNTs are characterized by surface area analysis Brunner–Emmett–Teller method (BET), X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopic analysis, field emission scanning electron microscopy, high-resolution transmission electron microscopy and energy-dispersive X-ray spectroscopy. The electrochemical performances of AC-AC, MWCNTs-MWCNTs and AC-MWCNTs (25:75) symmetric electrodes are studied by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. The AC-MWCNTs (25:75) single electrode performance is also studied in two different electrolytes, such as 0.5 M Na2SO4 and 0.5 M H2SO4. The fabricated AC-MWCNTs (25:75) symmetric supercapacitor cell exhibits excellent electrochemical performance in 0.5 M Na2SO4. It shows a specific capacitance of 55.51 Fg−1, energy density 4.852 Wh Kg−1 and power density of 199.18 W Kg−1 at a current density of 1 Ag−1 in the voltage window of 0–1.8 V. The AC-AC and AC-MWCNTs (25:75) symmetric supercapacitor electrodes show outstanding performance.

Citation status

This is the result of checking the information with the same ISSN, publication year, volume, and start page between the WoS and the KCI journals. (as of 2024-07-26)

Total Citation Counts(KCI+WOS) (17) This is the number of times that the duplicate count has been removed by comparing the citation list of WoS and KCI.

Scopus Citation Counts (17) This is the result of checking the information with the same ISSN, publication year, volume, and start page between articles in KCI and the SCOPUS journals. (as of 2024-10-01)

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