Controllable synthesis of nitrogen-doped mesoporous carbons for supercapacitor applications

Li, Zhu; Guo, Kunkun; Chen, Xuli

doi:10.1039/c7ra02701j

Cited by 41 publications

(22 citation statements)

References 38 publications

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“…All in all, these processes (pre‐carbonization, activation and doping steps) are tedious, complicated, uneconomical and time‐consuming. However, the second way is to produce heteroatom‐doped porous carbon by directly carbonization of some biomass . For instance, Xu et al .…”

Section: Introductionmentioning

confidence: 99%

Effect of Self‐Doped Heteroatoms in Biomass‐Derived Activated Carbon for Supercapacitor Applications

Chen

Yang

et al. 2019

ChemistrySelect

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As a green and effective energy storage device, supercapacitors have been attractive due to their high power density along with long cycle stability. Among various electrode materials, carbon materials have drawn significant attention due to their wonderful properties, such as high specific surface area, electronic conductivity, chemical stability and porous structures. In addition, challenges come from global warming and environmental pollution, biomass derived carbon materials feature the concepts of the sustainable development of chemistry. In this, the review not only summarizes the most advanced progress in biomass derived heteroatoms self‐doped carbon materials for supercapacitor, but also provides important guidelines for the future design of biomass‐derived carbons with heteroatoms doping in specific energy applications.

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Section: Introductionmentioning

confidence: 99%

Effect of Self‐Doped Heteroatoms in Biomass‐Derived Activated Carbon for Supercapacitor Applications

Chen

Yang

et al. 2019

ChemistrySelect

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“…However, it is noted that the H 4 hysteresis loop of OMC/G‐K 2 CO 3 has closed up at the relatively higher pressure P/P 0 , indicating OMC/G‐K 2 CO 3 contains much larger mesopores, as also confirmed in Table . In addition, the H 4 hysteresis loop becomes unclear after KOH activation as reported previously ,. It is therefore inferred that OMC/G‐ x after oxysalts activations could partially keep the original mesostructures of OMC/G before activation.…”

Section: Resultsmentioning

confidence: 53%

“…The relatively low specific surface area of ordered mesoporous carbons would dramatically limit their applications of supercapacitors. The further generation of porosity in the mesoporous wall or OMC surface is therefore required to increase the specific surface area and also promote the diffusion rate of electrolyte ions within the electrode, which is often realized by either physical or chemical post‐synthesis activation processes ,,. The physical activation includes that precursors are first carbonation at high temperature (600‐1000 °C) in N 2 or Ar atmosphere followed by activation with CO 2 steam, air, or their mixtures .…”

Section: Introductionmentioning

confidence: 99%

Ordered Mesoporous Carbons Loading on Graphene after Different Molten Salt Activations for Supercapacitor Applications

Chen

Yang

et al. 2018

Energy Tech

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The molten salt activation containing different oxysalts are proposed to activate the ordered mesoporous carbons loading on graphene layers (OMC/G). The effects of different oxysalts activations on the structures of OMC/G are thoroughly investigated by scan electron microscopy (SEM), small angle X‐ray scattering (SAXS), Raman spectroscopy and nitrogen adsorption‐desorption at 77 K. The structures of these carboneous materials are related with the oxidizing nature of these oxysalts. By using weak oxysalt of K2CO3, the original structure of OMC/G is almost kept together with the appearance of a lot of micropores and mesopores. The electrochemical performances of OMC/G after different oxysalts activation are also studied for supercapacitor applications. OMC/G after weak oxysalt of K2CO3 based electrode results in the highest specific capacitance up to 332.5 F g−1 at a current density of 1.0 A g−1, which is higher than those after both KOH activation (276.8 F g−1) and the other three oxysalts activation. Moreover, OMC/G‐K2CO3 shows an excellent cycling stability with no capacitance loss over 5000 cycles. The molten salt activation would be potentially applied to activate the porous carbons for supercapacitor applications.

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“…Therefore, the prepared materials are meet most of these requirements; nevertheless, their performances may be improved by enlarging the micropore size and amount. An activation step already demonstrated the utility in order to improve the porosity and to achieve higher capacitance [8,43] and can be implemented further for these materials. To explain this behavior several important factors must be considered such as porosity and surface chemistry.…”

Section: Resultsmentioning

confidence: 99%

Eco-Friendly Synthesis of Nitrogen-Doped Mesoporous Carbon for Supercapacitor Application

Moussa

Hajjar‐Garreau

Taberna

et al. 2018

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A sustainable and simple synthesis procedure involving the co-assembly of green phenolic resin and amphiphilic polymer template in water/ethanol mixture at room temperature to synthesize nitrogen doped mesoporous carbon is reported herein. Guanine is proposed as a novel nitrogen-based precursor which is able to create H-bondings both with the phenolic resin and the template allowing the formation of mesoporous carbons with nitrogen atoms uniformly distributed in their framework. The influence of the synthesis procedure, template amount and annealing temperature on the carbon textural properties, structure and surface chemistry were investigated. For several conditions, carbon materials with ordered pore size and high nitrogen content (up to 10.6 at %) could be achieved. The phase separation procedure combined with optimal amount of template favor the formation of ordered mesoporous carbons with higher specific surface area while the increase in the temperature induces a decrease in the surface area and amount of heteroatoms (N and O). The electrochemical performances as electrode in supercapacitors were evaluated in acidic medium and the capacitance was closely related to the material conductivity and surface chemistry.

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Controllable synthesis of nitrogen-doped mesoporous carbons for supercapacitor applications

Abstract: Nitrogen-doped mesoporous carbons have been controllably synthesized through a solvent evaporation induced self-assembly method. The carbons show 70% of the capacitor retained at current density of 50 A g−1 and no capacitance loss over 5000 cycles.

Cited by 41 publications

References 38 publications

Effect of Self‐Doped Heteroatoms in Biomass‐Derived Activated Carbon for Supercapacitor Applications

Effect of Self‐Doped Heteroatoms in Biomass‐Derived Activated Carbon for Supercapacitor Applications

Ordered Mesoporous Carbons Loading on Graphene after Different Molten Salt Activations for Supercapacitor Applications

Eco-Friendly Synthesis of Nitrogen-Doped Mesoporous Carbon for Supercapacitor Application

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