Synergistic effect of sulfur-doped reduced graphene oxide created via microwave-assisted synthesis for supercapacitor applications

Rosli, Nurul Hazwani Aminuddin; Lau, Kam Sheng; Winie, Tan; Chin, Siew Xian; Chia, Chin Hua

doi:10.1016/j.diamond.2021.108696

Cited by 28 publications

(23 citation statements)

References 51 publications

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“…This agrees with previous reports on the formation of sulfur functionalities/adsorbed species under similar experimental conditions. 32,37 The poor signal-to-noise ratios in the spectra for N1s and S2p were due to respective low elemental concentrations and inelastic electron scattering in the samples causing a related rise in the background (Fig. 2(b) and (c)).…”

Section: Resultsmentioning

confidence: 99%

“…4 and Table 2). 37 The defect intensity was calculated by dividing the area under the D-band by that under the G-band.…”

Section: Elemental Composition and Surface Functional Group Analysismentioning

confidence: 99%

“…7(a)-(e) and Table 5). Another possible reason is the tailored lattice electronic and physicochemical properties emanating from the pyridinic-and pyrrolic-N doping effect that induced pseudocapacitive contributions and enhanced electron transfer from graphitic-N. 22,37 Despite lower bulk resistivity, and higher electrical conductivity, carrier mobility, elemental N and N at% (Tables 1 and 5), U190 had lower C s than U130 at slower v. This could be because of greater wettability (deductions from Fig. 6(a)) and higher carrier density effects of U130 (Table 5).…”

Section: Electrochemical Characterizationmentioning

confidence: 99%

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Nitrogen-doped reduced graphene oxide-polyaniline composite materials: hydrothermal treatment, characterisation and supercapacitive properties

et al. 2023

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Section: Resultsmentioning

confidence: 99%

“…4 and Table 2). 37 The defect intensity was calculated by dividing the area under the D-band by that under the G-band.…”

Section: Elemental Composition and Surface Functional Group Analysismentioning

confidence: 99%

Section: Electrochemical Characterizationmentioning

confidence: 99%

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Nitrogen-doped reduced graphene oxide-polyaniline composite materials: hydrothermal treatment, characterisation and supercapacitive properties

et al. 2023

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“…Tailoring the properties of graphene using nitrogen [ 56 ], halogens [ 57 ], and sulfur doping [ 58 , 59 ] and its applications in energy storage devices and sensors have been comprehensively reviewed. The nitrogen element, adjacent to the carbon, has almost similar atomic radii (0.70 Å) as carbon (0.77 Å), but possesses higher electronegativity (3.04) than C (2.55), which makes it easier to introduce nitrogen into the carbon lattice through substitution doping.…”

Section: Introductionmentioning

confidence: 99%

“…From an energy standpoint, sulphur is more likely to replace the carbon atoms in the serrated edge of the graphene to achieve doping. [ 58 ]. Phosphorous and boron are less electronegative than nitrogen and sulfur.…”

Section: Introductionmentioning

confidence: 99%

Phosphorous- and Boron-Doped Graphene-Based Nanomaterials for Energy-Related Applications

et al. 2023

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Doping is a great strategy for tuning the characteristics of graphene-based nanomaterials. Phosphorous has a higher electronegativity as compared to carbon, whereas boron can induce p-type conductivity in graphene. This review provides insight into the different synthesis routes of phosphorous- and boron-doped graphene along with their applications in supercapacitors, lithium- ions batteries, and cells such as solar and fuel cells. The two major approaches for the synthesis, viz. direct and post-treatment methods, are discussed in detail. The former synthetic strategies include ball milling and chemical vapor discharge approaches, whereas self-assembly, thermal annealing, arc-discharge, wet chemical, and electrochemical erosion are representative post-treatment methods. The latter techniques keep the original graphene structure via more surface doping than substitutional doping. As a result, it is possible to preserve the features of the graphene while offering a straightforward handling technique that is more stable and controllable than direct techniques. This review also explains the latest progress in the prospective uses of graphene doped with phosphorous and boron for electronic devices, i.e., fuel and solar cells, supercapacitors, and batteries. Their novel energy-related applications will continue to be a promising area of study.

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Unveiled Supercapacitive Performance of Se‐doped Graphene Nanoarchitectonics Prepared via Supercritical Fluid Technique

et al. 2023

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Doping of graphene with variety of heteroatoms is presently focused for electrochemical supercapacitor applications because it functions as a hybrid supercapacitor. Herewith, we report the fabrication of Se‐doped graphene with selenium dioxide using a supercritical fluid technique. Both the existence as well as the quantity of Se‐doping in graphene are established using XPS and EDAX techniques. The Se‐doped graphene derived from the weight ratio of selenium dioxide and graphene oxide of 1 : 3 resulted in an enriched gravimetric capacitance achieving 581 F g−1 (1 M H2SO4). The specific capacity of the optimised Se‐doped graphene based symmetric supercapacitor in 0.01 M solution of ammonium metavanadate in 1 M H2SO4 solution is found to be 420 C g−1 and attained an improved capacitance retention of 85% over 50000 cycles along with 94% coulombic efficiency. The energy density of the Se‐doped graphene symmetric supercapacitor is found to be 23.33 Wh kg−1 in 0.01 M solution of ammonium metavanadate in 1 M H2SO4 solution.

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Synergistic effect of sulfur-doped reduced graphene oxide created via microwave-assisted synthesis for supercapacitor applications

Cited by 28 publications

References 51 publications

Nitrogen-doped reduced graphene oxide-polyaniline composite materials: hydrothermal treatment, characterisation and supercapacitive properties

Nitrogen-doped reduced graphene oxide-polyaniline composite materials: hydrothermal treatment, characterisation and supercapacitive properties

Phosphorous- and Boron-Doped Graphene-Based Nanomaterials for Energy-Related Applications

Unveiled Supercapacitive Performance of Se‐doped Graphene Nanoarchitectonics Prepared via Supercritical Fluid Technique

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