Synergetic effect of nitrogen and sulfur co-doping in mesoporous graphene for enhanced energy storage properties in supercapacitors and lithium-ion batteries

Nankya, Rosalynn; Opar, David O.; Kim, Minjae; Paek, Seung‐Min; Jung, Hyun Suk

doi:10.1016/j.jssc.2020.121451

Cited by 22 publications

(29 citation statements)

References 58 publications

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“…From BET results and the isothermal profile, the mechanochemical treatment eliminated almost all microporosity present in the parent MGO (Figure d vs b), leaving a low mesoporosoty content in the final NSMGO (Figure b, centered at ca.7 nm). Without activation, NSMGO has very low specific surface area, being almost nonporous. , According to all characterization results, (NH 4 ) 2 SO 4 could be employed as a N and S precursor, rendering N,S-doped MGO after ball milling.…”

Section: Resultsmentioning

confidence: 84%

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Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications

Shan

Mengyao

et al. 2020

ACS Sustainable Chem. Eng.

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N,S-dual-doped multilayer graphene oxide (NSMGO) has been successfully synthesized via mechanochemistry using (NH 4 ) 2 SO 4 as a nitrogen and sulfur source, featuring a simple, low cost, and green process. The content of N and S by elemental analysis was 5.82% and 1.33%, respectively. NSMGO was further characterized, showing that N was successfully doped into the aromatic rings but S was not. NSMGO showed an excellent electrochemical performance. The specific capacitance could reach 135 F/g when the current density was 1 A/g. This work provided a new and highly effective methodology for the preparation of sustainable and high-performance N,S-carbon with inorganic precursors.

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Section: Resultsmentioning

confidence: 84%

“…Without activation, NSMGO has very low specific surface area, being almost nonporous. 24,25 According to all characterization results, (NH 4 ) 2 SO 4 could be employed as a N and S precursor, rendering N,S-doped MGO after ball milling.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications

Shan

Mengyao

et al. 2020

ACS Sustainable Chem. Eng.

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“…It increases the capacitance and provides a fast charge/discharge rate and a great storage capacity for charging [32,33] . When compared to single doping, co‐doping can improve the features of graphene‐based materials owing to the synergistic effect among the doped elements [34–36] . For instance, sulphur doped graphene affects as a reinforcement of the bond polarization, therefore it causes to rearrange the chemical structure of the layer.…”

Section: Introductionmentioning

confidence: 99%

“…[32,33] When compared to single doping, co-doping can improve the features of graphene-based materials owing to the synergistic effect among the doped elements. [34][35][36] For instance, sulphur doped graphene affects as a reinforcement of the bond polarization, therefore it causes to rearrange the chemical structure of the layer. It can also develop the way of energy storage, conductivity, and wettability of electrode materials.…”

Section: Introductionmentioning

confidence: 99%

New Approach Synthesis of S, N Co‐Doped Graphenes for High‐Performance Supercapacitors

et al. 2022

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In this study, S, N co‐doped graphene‐based electrodes were synthesized by a one‐step, environmentally friendly and low−Cost method known as Yucel's method in the solutions consisting of different concentration ratios of sulfuric and nitric acids and different cycles in the certain potential range for the first time in the literature. The prepared S, N co‐doped graphene‐based electrodes were characterized by spectroscopic, microscopic and electrochemical methods. In electrochemical characterization, cyclic voltammetry and electrochemical impedance spectroscopy were used. The supercapacitor performances were examined by cyclic charge‐discharge tests of the electrodes in the specified supporting electrolyte solution. Areal capacitance values varied from 71.48 mF.cm−2 to 893.2 mF.cm−2 at a current density of 10 mA cm−2 in the prepared electrodes.

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“…Depending on the charge storage mechanisms of the active materials used, the electrochemical systems (EC) can be generally classified into two types, namely electric double-layer capacitors based on ion adsorption (EDLCs mainly carbonaceous material with a high surface area) and pseudocapacitors (including redox material such as transition metal oxides and conducting polymers) [3]. Pseudocapacitors have been shown to exhibit much higher capacitance than the EDLCs and are either used to complement EDLCs to improve the power and energy densities [4].…”

Section: Introductionmentioning

confidence: 99%

Modified Activation Process for Supercapacitor Electrode Materials from African Maize Cob

et al. 2020

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In this work, African maize cobs (AMC) were used as a rich biomass precursor to synthesize carbon material through a chemical activation process for application in electrochemical energy storage devices. The carbonization and activation were carried out with concentrated Sulphuric acid at three different temperatures of 600, 700 and 800 °C, respectively. The activated carbon exhibited excellent microporous and mesoporous structure with a specific surface area that ranges between 30 and 254 m2·g−1 as measured by BET analysis. The morphology and structure of the produced materials are analyzed through Field Emission Scanning Electron Microscopy (FESEM), Fourier Transform Infrared Spectroscopy (FTIR), X-Ray Diffraction (XRD), Boehm titration, X-ray Photoelectron Spectroscopy (XPS) and Raman Spectroscopy. X-ray photoelectron spectroscopy indicates that a considerable amount of oxygen is present in the materials. The functional groups in the activated carbon enhanced the electrochemical performance and improved the material’s double-layer capacitance. The carbonized composite activated at 700 °C exhibited excellent capacitance of 456 F g−1 at a specific current of 0.25 A g−1 in 6 M KOH electrolyte and showed excellent stability after 10,000 cycles. Besides being a low cost, the produced materials offer good stability and electrochemical properties, making them suitable for supercapacitor applications.

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Synergetic effect of nitrogen and sulfur co-doping in mesoporous graphene for enhanced energy storage properties in supercapacitors and lithium-ion batteries

Cited by 22 publications

References 58 publications

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications

New Approach Synthesis of S, N Co‐Doped Graphenes for High‐Performance Supercapacitors

Modified Activation Process for Supercapacitor Electrode Materials from African Maize Cob

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Synergetic effect of nitrogen and sulfur co-doping in mesoporous graphene for enhanced energy storage properties in supercapacitors and lithium-ion batteries

Cited by 22 publications

References 58 publications

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH4)2SO4 for Supercapacitor Applications

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH4)2SO4 for Supercapacitor Applications

New Approach Synthesis of S, N Co‐Doped Graphenes for High‐Performance Supercapacitors

Modified Activation Process for Supercapacitor Electrode Materials from African Maize Cob

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Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications

Mechanochemical Preparation of N,S-Doped Graphene Oxide Using (NH₄)₂SO₄ for Supercapacitor Applications