Templated synthesis and activation of highly nitrogen-doped worm-like carbon composites based on melamine-urea-formaldehyde resins for high performance supercapacitors

Sun, Guanglin; Ma, Liya; Ran, Jiabing; Li, Bing; Shen, Xinyu; Tong, Hua

doi:10.1016/j.electacta.2016.02.066

Cited by 60 publications

(19 citation statements)

References 39 publications

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“…A maximum energy density of 27.3 Wh kg −1 can be obtained at a power density of 182 W kg −1 , retaining 14.2 Wh kg −1 even at a high power density of 18.3 kW kg −1 . These values are highly comparable or even higher than those of the previously reported symmetric supercapacitors in Na 2 SO 4 electrolyte, such as nitrogen and sulfur co‐doped porous carbon nanosheets, interconnected porous carbon, two‐dimensional mesoporous carbon nanosheets, N, O co‐doped honeycomb porous carbon, highly nitrogen‐doped worm‐like carbon, poplar catkin derived hierarchical hollow activated carbon nanomesh, three‐dimensional flower‐like and hierarchical porous carbon, N‐doped carbon nanosheets . Besides, the capacitance of AMFGW//AMFGW symmetric supercapacitor retains about 94.8 % of initial capacitance after 6000 cycles measured at 2 A g −1 , and the columbic efficiency maintains around 99.2 % (Figure S6).…”

Section: Resultssupporting

confidence: 73%

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

et al. 2019

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The rational design of carbon materials with high electrical conductivity, low tortuosity, large specific surface area, and sufficient heteroatom doping for high-performance supercapacitor application is highly desired but remains as a major challenge. Herein, by templating the natural microtubular and thin-walled structure of willow catkin, a highly conductive nitrogen-doped hollow carbon microtube material was synthesized through an integrated procedure including polymerization, pyrolysis, and activation. Robust N-doped crosslinked graphene was grafted on the internal and external walls of carbonized hollow catkin to form a sandwich structure of the derived carbon. The obtained carbon microtubes exhibit a large specific surface area (2608 m 2 g À 1 ), short and unimpeded ion-diffusion paths, high-level heteroatom doping (O: 12.5 at %, N: 3.4 at %), and excellent electrical conductivity (128 S m À 1 ). Benefitting from its desirable textural properties and favorable elemental composition, the derived electrode, without the addition of conductive additives, delivers impressive capacitance values of 408 F g À 1 (0.5 A g À 1 ) in 6 M KOH electrolyte and 420.8 F g À 1 (1 A g À 1 ) in 1 M H 2 SO 4 , as well as an outstanding rate capability and excellent cycling stability. In addition, the assembled symmetric supercapacitor displays an ultrahigh energy density of 27.3 Wh kg À 1 at 182 W kg À 1 in 1 M Na 2 SO 4 electrolyte. These advanced characteristics ensure the carbon microtubes hold great promise for energy storage/conversion applications.

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Section: Resultssupporting

confidence: 73%

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

et al. 2019

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“…Among them, the porous melamine-formaldehyde resins (PMFRs) have gained great attention because they can be produced by low-cost highly abundant melamine that has suitable alkalescence (pKa = 5.5) versatile reactivity [28][29][30]. In addition, it is a mass produced product in the chemical industry and can be used as crosslinker in organic coating and plastic [31][32][33]. In general, the PMFRs can be synthesized by using the microemulsion approach or the template method, such as SiO 2 particles [34].…”

Section: Introductionmentioning

confidence: 99%

Simple synthesis of porous melamine-formaldehyde resins by low temperature solvothermal method and its CO2 adsorption properties

Yin¹,

Xu²,

Wang³

et al. 2017

Express Polym. Lett.

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Abstract.A simple and environmentally-friendly approach for the preparation of porous melamine-formaldehyde resins (PMFRs) was developed by using low-boiling-point solvents, such as water, as pore-forming agent. With using dimethyl sulfoxide (DMSO) and low-boiling solvents cosolvent method, PMFRs with a high specific surface area and well-defined pore structure can be synthesized at a low reaction temperature of 140°C for a short reaction duration in 20 hours, which can replace the conventional methods that use dimethyl sulfoxide (DMSO) as reaction medium and require 3 days at 170°C to achieve similar surface area. When loaded with polyethylenimine (PEI), the PMFR-PEI-30% showed good CO 2 adsorption performance with a capacity of up to 2.89 mmol/g at 30°C. These results bring new perspectives for the development of lowcost and environmentally-friendly synthetic methods for porous materials, which can boost their widespread applications.

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“…Raman spectra can be used to further characterize the graphitization degree of UFCM and SUFCM‐1.0. As shown in Figure (c), the Raman spectra consist of two broad peaks at 1338 and 1585 cm −1 , which are related to amorphous D peaks and graphitized carbon G peaks, respectively . The relative strength ratio of D‐peak to G‐peak reflects the degree of graphitization of carbon materials.…”

Section: Resultsmentioning

confidence: 92%

Silica‐assisted urea‐formaldehyde‐based carbon microspheres with enhanced supercapacitor performances as electrode

Yue

Yuan

Zhao

et al. 2019

J of Applied Polymer Sci

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Novel silica (SiO2)‐assisted urea‐formaldehyde‐based microspheres (SUFMs) have been successfully prepared by condensation polymerization with SiO2 nanoparticles as template. The support effect of SiO2 and the improved thermal stability of SUFM have been investigated. The SUFM is pyrolyzed at high temperature under Ar atmosphere to achieve its carbonized product (SUFCM), which retains its spherical morphology by alkali etching after carbonization. The SiO2 acts as a stabilizer that limits the flowing domain of the melt resin around the SiO2. When used as the electrode material for supercapacitors, the SUFCM exhibits excellent electrochemical performance with a high specific capacitance of 218 F g−1 at 1 A g−1 in 2 M H2SO4 aqueous electrolyte and a good rate capability of 138 F g−1 (63% capacitance retention) at 10 A g−1. More importantly, the SUFCM electrode demonstrates a robust long‐term stability without capacitance fading after 10,000 cycles. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48388.

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Templated synthesis and activation of highly nitrogen-doped worm-like carbon composites based on melamine-urea-formaldehyde resins for high performance supercapacitors

Cited by 60 publications

References 39 publications

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

Rational Design of Highly Conductive Nitrogen‐Doped Hollow Carbon Microtubes Derived from Willow Catkin for Supercapacitor Applications

Simple synthesis of porous melamine-formaldehyde resins by low temperature solvothermal method and its CO2 adsorption properties

Silica‐assisted urea‐formaldehyde‐based carbon microspheres with enhanced supercapacitor performances as electrode

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