Three dimensional N-doped graphene–CNT networks for supercapacitor

You, Bo; Wang, Lili; Yao, Li; Yang, Jun

doi:10.1039/c3cc41949e

Cited by 357 publications

(180 citation statements)

References 21 publications

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“…[ 30,31 ] The N-doped electrodes show higher capacitance than the pristine graphene or CNT. [ 32,33 ] Another widely used approach is to etch or to anneal carbon materials in the nitrogen-containing atmosphere by the plasma or thermal treatment, respectively. [33][34][35] The carbon materials with high nitrogen concentrations facilitate to anchor metal oxides and improve electrical conductivity of the compounds, which can further enhance the energy and power densities.…”

Section: Introductionmentioning

confidence: 99%

“…[ 32,33 ] Another widely used approach is to etch or to anneal carbon materials in the nitrogen-containing atmosphere by the plasma or thermal treatment, respectively. [33][34][35] The carbon materials with high nitrogen concentrations facilitate to anchor metal oxides and improve electrical conductivity of the compounds, which can further enhance the energy and power densities. [ 36,37 ] The third way is the pyrolysis of nitrogen heterocyclic compounds, nitrogen-containing polymers or biomass derivatives (chitosan, glucosamine or crawfi sh shell) to keep nitrogen element on the basal plane of carbon materials, increasing rich defects, and improving electrode/electrolyte wettability.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen‐Doped Carbon Membrane Derived from Polyimide as Free‐Standing Electrodes for Flexible Supercapacitors

Dong

Zhang

et al. 2015

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Nitrogen-doped carbon materials have attracted great interest in the energy storage due to the better electrochemical performances than the pristine carbon materials. In this work, a heterocyclic polyimide containing benzopyrrole and benzimidazole rings is carbonized to fabricate the free-standing and flexible carbon membrane (CarbonPI ) with a high packing density (0.89 cm(-3)), in which the location of nitrogen atoms in the doped configurations is easily controlled. XPS analysis indicates that quaternary nitrogen is the predominant nitrogen-doped configurations. The high content of nitrogen effectively improves the wettability of the electrode materials. The CarbonPI membrane exhibits excellent volumetric capacitance (159.3 F cm(-3) at 1 A g(-1)), high rate capability (127.5 F cm(-3) at 7 A g(-1)), and long cycle life. TEM images reveal the very slight change of the microstructure of graphitic nanosheet of CarbonPI during the long charge/discharge cycles.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nitrogen‐Doped Carbon Membrane Derived from Polyimide as Free‐Standing Electrodes for Flexible Supercapacitors

Dong

Zhang

et al. 2015

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“…To enjoy the synergistic effects of these two graphitic allotropes, 3D CNT/graphene hybrid architectures have been prepared by hydrothermal treatment of CNT and graphene solution mixture (You et al, 2013). In this composite, the intercalating CNTs not only prevent stacking of graphene sheets but also facilitate electron and ion transport.…”

Section: D Cnt-graphene Hybridsmentioning

confidence: 99%

“…Heteroatom doping and integration of CNTs can be employed to enhance the capacitive behavior. You et al (2013) prepared N-doped 3D CNT-graphene aerogel electrode for supercapacitor application. It gives a maximum specific capacitance of 180 F g −1 at a current density of 0.5 A g −1 .…”

Section: Supercapacitorsmentioning

confidence: 99%

Three-Dimensional Porous Architectures of Carbon Nanotubes and Graphene Sheets for Energy Applications

2014

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Owing to their extraordinary physicochemical, electrical, and mechanical properties, carbon nanotubes (CNTs) and graphene materials have been widely used to improve energy storage and conversion. In this article, we briefly review the latest development on fabrication of 3D porous structures of CNTs or graphene sheets or their hybrids, and their applications in various energy devices including supercapacitors, (bio-) fuel cells, and lithium ion batteries.

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“…with nitrogen, sulfur, boron and/or phosphorus) is often used to modify the intrinsic electronic structure , enhance the wettability of the electrode surface (Zhu et al 2015) or introduce new pseudocapacitive interactions (Biel et al 2009) in order to improve the electrochemical performance of carbon electrodes Li et al 2007). There are two main methods employed in heteroatom doping; one is by direct pyrolysis of heteroatom-containing precursors (Xu et al 2015;Zhu et al 2015) and the other is by post-treating carbons with dopants You et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Carbonized cellulose beads for efficient capacitive energy storage

et al. 2018

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Natural biomaterials, including polysaccharides and amino acids, provide a sustainable source of functional carbon materials for electric energy storage applications. We present a one-pot reductive amination process to functionalize 2,3-dialdehyde cellulose (DAC) beads with chitosan and L-cysteine to provide single (N)-and dual (N/S)-doped materials. The functionalization enables the physicochemical properties of the materials to be tailored and can provide carbon precursors with heteroatom doping suitable for energy storage applications. Scanning electron microscopy, Fourier transform infrared spectroscopy and thermogravimetric analysis were used to characterize the changes to the beads after functionalization and carbonization. The results of X-ray photoelectron spectroscopy and energy-dispersive X-ray spectroscopy verified that the doping was effective, while the nitrogen sorption isotherms and pore-size distributions of the carbonized beads showed the effects of doping with different hierarchical porosities. In the electrochemical experiments, three kinds of carbon beads [pyrolyzed from DAC, chitosan-crosslinked DAC (CS-DAC) and L-cysteinefunctionalized DAC] were used as electrode materials. Electrodes of carbonized CS-DAC beads had a specific capacitance of up to 242 F g -1 at a current density of 1 A g -1 . These electrodes maintained a capacitance retention of 91.5% after 1000 charge/ discharge cycles, suggesting excellent cycling stability. The results indicate that reductive amination of DAC is an effective route for heteroatom doping of carbon materials to be used as electrode active materials for energy storage.

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Three dimensional N-doped graphene–CNT networks for supercapacitor

Cited by 357 publications

References 21 publications

Nitrogen‐Doped Carbon Membrane Derived from Polyimide as Free‐Standing Electrodes for Flexible Supercapacitors

Nitrogen‐Doped Carbon Membrane Derived from Polyimide as Free‐Standing Electrodes for Flexible Supercapacitors

Three-Dimensional Porous Architectures of Carbon Nanotubes and Graphene Sheets for Energy Applications

Carbonized cellulose beads for efficient capacitive energy storage

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