Indian Journal of Pure and Applied Physics

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Olive Oil Lampblack for Supercapacitor Electrodes


Affiliations
1 Physics Department, Bhaktapur Multiple Campus, Tribhuvan University, Bhaktapur 44800, Nepal
2 Department of Physics, Patan Multiple Campus, Tribhuvan University, Lalitpur 44800, Nepal
3 Department of Physics, Brooklyn College and the Graduate Center of the City University of New York, Brooklyn, NY 11210, United States
4 Department of Physics, SUNY Buffalo State, Buffalo, NY 14222, United States
5 Central Department of Chemistry, Tribhuvan University, Kritipur 44800, Nepal
6 Department of Applied Sciences and Chemical Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Lalitpur 44800, Nepal

In this study, we prepared and characterized lampblack of olive oil for application in supercapacitors. The lampblack was prepared by the simple technique of flame-soot method. The lampblack samples characterized by using X-ray Diffraction (XRD), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), N<sub>2</sub> adsorption-desorption isotherms, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDS) revealed that they contain mostly amorphous nanosized carbon particles with oxygenated functional groups and the carbon content in the lampblack was 92.6%. The surface area of the lampblack carbon calculated from the Brunauer-Emmett-Teller (BET) method was found to be about 302.7 m<sub>2</sub>g<sub>-1</sub> with an average pore size of 1.69 nm obtained from the Density Functional Theory (DFT) analysis. Lampblack carbon samples were used to prepare supercapacitor electrodes. Electrochemical properties of the electrodes were investigated in 6M aqueous KOH by Cyclic Voltammetry (CV), Galvanostatic Charge Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS) techniques. The specific capacitance of the electrode obtained from the GCD test was 70.36 Fg<sub>-1</sub> at the current density of 1 Ag<sub>-1</sub> with a low Equivalent Series Resistance (ESR) value of 0.81 Ω.

Keywords

Lampblack; Supercapacitor; Hierarchical pores; Flame-soot method
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  • Olive Oil Lampblack for Supercapacitor Electrodes

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Authors

Prakash Joshia
Physics Department, Bhaktapur Multiple Campus, Tribhuvan University, Bhaktapur 44800, Nepal
Umesh Lawaju
Department of Physics, Patan Multiple Campus, Tribhuvan University, Lalitpur 44800, Nepal
Mim Lal Nakarmi
Department of Physics, Brooklyn College and the Graduate Center of the City University of New York, Brooklyn, NY 11210, United States
Ram Chandra Rai
Department of Physics, SUNY Buffalo State, Buffalo, NY 14222, United States
Sabina Khatri
Central Department of Chemistry, Tribhuvan University, Kritipur 44800, Nepal
Ramani Pradhan
Department of Applied Sciences and Chemical Engineering, Pulchowk Campus, Institute of Engineering, Tribhuvan University, Lalitpur 44800, Nepal

Abstract


In this study, we prepared and characterized lampblack of olive oil for application in supercapacitors. The lampblack was prepared by the simple technique of flame-soot method. The lampblack samples characterized by using X-ray Diffraction (XRD), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), N<sub>2</sub> adsorption-desorption isotherms, Scanning Electron Microscopy (SEM), and Energy Dispersive X-ray Spectroscopy (EDS) revealed that they contain mostly amorphous nanosized carbon particles with oxygenated functional groups and the carbon content in the lampblack was 92.6%. The surface area of the lampblack carbon calculated from the Brunauer-Emmett-Teller (BET) method was found to be about 302.7 m<sub>2</sub>g<sub>-1</sub> with an average pore size of 1.69 nm obtained from the Density Functional Theory (DFT) analysis. Lampblack carbon samples were used to prepare supercapacitor electrodes. Electrochemical properties of the electrodes were investigated in 6M aqueous KOH by Cyclic Voltammetry (CV), Galvanostatic Charge Discharge (GCD), and Electrochemical Impedance Spectroscopy (EIS) techniques. The specific capacitance of the electrode obtained from the GCD test was 70.36 Fg<sub>-1</sub> at the current density of 1 Ag<sub>-1</sub> with a low Equivalent Series Resistance (ESR) value of 0.81 Ω.

Keywords


Lampblack; Supercapacitor; Hierarchical pores; Flame-soot method