Ultra-fine carbon nanosheets from coal oxidation for tri-functional improvement of carbon nanofiber fabrics

Gan, Xuemeng; Yuan, Renlu; Zhu, Jiayao; Tang, Tingting; Qin, Fuwei; Zhu, Liangjun; Zhang, Jun; Wang, Luxiang; Zhang, Su; Song, Huaihe; Jia, Dianzeng

doi:10.1016/j.carbon.2022.09.022

Cited by 14 publications

(8 citation statements)

References 75 publications

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“…As can be seen from XRD patterns in Figures S6 and S7a, two wide diffraction peaks at about 25.0° and 42.7° correspond to the (002) and (100) crystal planes of the carbon material with partially graphitic structures. , The intensity of the (002) peak is significantly reduced, indicating the presence of more nongraphite structures. According to Figure S7, compared with PC, NPC has a lower degree of graphitization due to the presence of nitrogen.…”

Section: Resultsmentioning

confidence: 99%

Polymerization-Pyrolysis-Derived Hierarchical Nitrogen-Doped Porous Carbon for Energetic Capacitive Energy Storage

Feng

Wang²,

Chang

et al. 2023

ACS Appl. Energy Mater.

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Nitrogen-doped porous carbons are attractive electrode materials for supercapacitors because of their high specific capacitance and desirable surface property. Here, we report a facile polymerization-pyrolysis strategy to construct hierarchical porous carbon, which is rich in surface redox nitrogen species. The polymeric precursor of phenolic resin cross-linked with polyaniline is produced by a mild hydrothermal process. The following calcination procedure yields hierarchical nitrogen-doped porous carbon, which presents a large specific surface area of 968.5 m 2 g −1 with multi-scale porous structures including micro-, meso-, and macropores. It is found that pyrrolic nitrogen and oxidized nitrogen are successfully introduced on the porous carbon surface, and they can supply extra pseudo-capacitance. The synergy of massive charge storage sites and interconnected ion transport channels enables the hierarchical nitrogen-doped porous carbon to exhibit a high specific capacitance of 320.6 and 250.0 F g −1 in the alkaline electrolyte at current densities of 0.5 and 100 A g −1 , respectively. In addition, the assembled symmetrical supercapacitor with organic electrolytes shows a huge energy density of 48.9 Wh kg −1 at a power density of 375.0 W kg −1 , with a capacitance retention close to 100% after 50,000 cycles.

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Section: Resultsmentioning

confidence: 99%

Polymerization-Pyrolysis-Derived Hierarchical Nitrogen-Doped Porous Carbon for Energetic Capacitive Energy Storage

Feng

Wang²,

Chang

et al. 2023

ACS Appl. Energy Mater.

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“…When graphene quantum dots and carbon nanosheets are used as fillers, they can serve not only as reinforcement agents but also as cross-linking agents. 162,163 During preoxidation at 280 °C in the air for 2 h, e-spun PAN/graphene quantum dots nanofibers were cross-linked to networks. 162 The PAN chains underwent cyclization, dehydrogenation, and partial oxidation to form six-member rings with highly active hydrogen atoms and hydroxyl groups, which could further react with hydroxyl-containing graphene quantum dots.…”

Section: Cross-linking With Edc/nhs Combinationmentioning

confidence: 99%

“…However, the cross-linking of PAN and carbon nanosheets occurred mainly during the carbonization at 800 °C in N 2 for 1 h, while the cross-linking process/mechanism was exactly the same. 163 The interconnected carbon nanofibers prepared by the above-mentioned two methods are more conducive to electron transport, and thus can be applied to the preparation of supercapacitors.…”

Section: Classification and Mechanismmentioning

confidence: 99%

Cross-linking electrospinning

Han,

Wang,

Kang

et al. 2023

Nanoscale

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“…10−12 EDLCs have higher rapid charge− discharge performance than regular batteries by adsorbing a large number of electrolyte ions on the surface of electrodes. 13 Carbon materials, such as graphene, 14,15 activated carbon, 16,17 carbon nanotubes, 18 carbon nanofibers, 19,20 and carbon aerogel, 21 are widely used as EDLCs because of their low cost, lightweight, high stability, and high plasticity. 22 In addition, the properties of assembled supercapacitors are closely related to the type of carbon material.…”

Section: Introductionmentioning

confidence: 99%

“…Reducing environmental pollution while dealing with energy storage issues is one of the focuses to be addressed at present. , As an eco-friendly energy storage device, supercapacitors, including electric double-layer capacitors (EDLCs) and pseudocapacitors, have attracted extensive investigations due to their great advantages, such as high power density and long cycling life. − EDLCs have higher rapid charge–discharge performance than regular batteries by adsorbing a large number of electrolyte ions on the surface of electrodes . Carbon materials, such as graphene, , activated carbon, , carbon nanotubes, carbon nanofibers, , and carbon aerogel, are widely used as EDLCs because of their low cost, lightweight, high stability, and high plasticity . In addition, the properties of assembled supercapacitors are closely related to the type of carbon material .…”

Section: Introductionmentioning

confidence: 99%

Efficient Two-Step Utilization of Organic Matter in Shengli Lignite for Producing Chemicals and Supercapacitor Electrode Materials

et al. 2023

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Conversion of organic matter in lignite into chemicals and high-performance carbon materials is a promising approach for clean and efficient utilization of lignite. Herein, Shengli lignite (SL) is subjected to supercritical ethanolysis, followed by ultrasonic extraction with isometric carbon disulfide/ acetone for separating SL into soluble organic matters (SOMs) and insoluble extraction residue (ER) with highly condensed aromatic structures. According to the analyses with gas chromatography/ mass spectrometry (GC/MS) and Orbitrap MS, the SOMs were mainly composed of oxygen-containing compounds, such as arenols, aliphatic esters, and aromatic esters, which can be used as feedstock for producing value-added chemicals. The ER was used as a carbon precursor to produce three-dimensional porous carbon materials (PCMs) through precarbonization and activation with KOH using nano-ZnO as an in situ template. The prepared PCMs possessed high stability, large specific surface area, and abundant oxygen-doped carbon, showing a high specific capacitance of 300 F g −1 at 0.5 A g −1 in a three-electrode system, and the capacitance retention was 100% after 10,000 cycles of charge and discharge at 5 A g −1 in a two-electrode system.

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Ultra-fine carbon nanosheets from coal oxidation for tri-functional improvement of carbon nanofiber fabrics

Cited by 14 publications

References 75 publications

Polymerization-Pyrolysis-Derived Hierarchical Nitrogen-Doped Porous Carbon for Energetic Capacitive Energy Storage

Polymerization-Pyrolysis-Derived Hierarchical Nitrogen-Doped Porous Carbon for Energetic Capacitive Energy Storage

Cross-linking electrospinning

Efficient Two-Step Utilization of Organic Matter in Shengli Lignite for Producing Chemicals and Supercapacitor Electrode Materials

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