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Reduced graphene oxide derived from urea-assisted solution combustion route and its electrochemical performance
G PRADEEP KUMAR PINKU KRISHNAN M S ARSHA I N JAWAHAR V BIJU
Volume 45 Published: 30 August 2022 Article ID 0170
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https://www.ias.ac.in/article/fulltext/boms/045/0170 -
Keywords
Reduced graphene oxide ;solution combustion ;supercapacitor ;electrochemical performance. -
Abstract
Reduced graphene oxide (rGO) is synthesized from graphite oxide through urea-assisted solution combustion route. X-ray diffraction analysis reveals a decrease in the interplanar spacing ($d_{002}$) value from 8.14 to 3.44 Aº oncombustion due to reduction. Number of graphitic layers decreases from 58 to 9 on combustion indicating efficient exfoliation. Scanning electron micrographs reveal substantial reduction in the lateral dimension of graphitic planes fromgreater than ${\sim}$1${\mu}$m to less than ${\sim}$380 nm. Raman spectroscopy studies indicate an enhancement of defects in the rGO with an $I_D$/$I_G$ ratio of 1.19. Diminishing intensity of vibrational modes of different oxygen functional groups in the Fourier transform infrared spectrum and higher carbon to oxygen ratio of 12.13 from X-ray photoelectron spectroscopy indicate excellent reduction. N1s X-ray photoelectron spectrum confirms nitrogen doping. Electrical conductivity of rGO is 38 Sm$^{-1}$. The sample as an active material in a three-electrode configuration with 6 M KOH electrolyte exhibits a capacitance of 75.1 F g$^{-1}$ at a current density of 0.1 A g$^{-1}$, and 63% of it is retained even at a current density of 10 A g$^{-1}$. It also exhibits 103% of its initial capacitance after 1000 cycles.
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Author Affiliations
G PRADEEP KUMAR1 PINKU KRISHNAN1 M S ARSHA1 I N JAWAHAR1 V BIJU1 2
- Department of Physics, University of Kerala, Thiruvananthapuram 695 581, India
- Department of Nanoscience and Nanotechnology, University of Kerala, Thiruvananthapuram 695 581, India
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Dates
- Published
- 30 August 2022
- Manuscript received
- 6 August 2021
- Accepted
- 13 May 2022
- Final version published online
- 30 August 2022
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Supplementary Material
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