In situ nitrogen-doped carbon nano-onions for ultrahigh-rate asymmetric supercapacitor

Mohapatra, Debananda; Olvianas, Muhammad; Sayed, Mohamed A.; Parida, Smrutiranjan; Shim, Jae‐Jin

doi:10.1016/j.electacta.2019.135363

Cited by 51 publications

(19 citation statements)

References 49 publications

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“…Therefore, to improve the supercapacitance, doping was performed into the CNO matrix to impose some pseudocapacitive behavior, and as discussed earlier, N‐doping appears to be most effective to improve the capacitive performance via nitrogen pyridinic redox reactions. As far as the N‐doped CNOs (N‐CNOs) are concerned, there was only one report on N‐CNO‐based supercapacitors by Mohapatra et al 26 (to the best of the Authors' knowledge). Although this group reported some N‐CNO‐based supercapacitor devices (two‐electrode system), but no specific capacitance values for the three‐electrode system were provided.…”

Section: Resultsmentioning

confidence: 99%

“…Olena Mykhailiv et al described the synthesis and applications of energy storage devices for boron‐doped CNOs 25 . Debananda et al described the in‐situ growth of N‐CNOs for asymmetric supercapacitors 26 . All these studies have reflected one important point that, regarding device fabrication, an asymmetric two‐electrode supercapacitor cell configuration with CNO as a negative electrode and a metal‐oxide as a positive electrode can produce optimal energy‐power performance.…”

Section: Introductionmentioning

confidence: 99%

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Superior energy‐power performance of N‐doped carbon nano‐onions‐based asymmetric and symmetric supercapacitor devices

Pallavolu

Neelima

Banerjee

et al. 2021

Intl J of Energy Research

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Summary Highly graphitic nitrogen‐doped carbon nano‐onions (N‐CNO) have attracted much attention in the field of energy storage device applications. Herein, we have synthesized N‐CNO by a simple flame pyrolysis method for symmetric and asymmetric (ASC) supercapacitor devices. The nitrogen doping is performed in‐situ during the pyrolysis of pyrrole. The synthesized N‐CNO has a high surface area of 49 m2 g−1 with 4 at% nitrogen content. The structural properties have confirmed the formation of graphitic N‐CNO with highly ordered concentric graphene layers with proper lattice spacing. The fabricated symmetric and asymmetric devices have shown high specific capacitance and excellent energy‐power performance. Especially, the ASC device shows a specific capacitance value 205 F g−1 with a high energy density (60 Wh kg−1) and power density (5.5 kW kg−1), leading to an increase in the power density by 260% for a mere 60% decrease in the energy density. In addition, both the novel symmetric and asymmetric devices have shown excellent capacity retention of 96% to 98% over 5000 cycles. The demonstrated results show the superior electrochemical performance of the active material, which indicates that the N‐rich‐CNOs can be used as a novel anode material in energy storage devices with high energy density and high power performance.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Superior energy‐power performance of N‐doped carbon nano‐onions‐based asymmetric and symmetric supercapacitor devices

Pallavolu

Neelima

Banerjee

et al. 2021

Intl J of Energy Research

View full text Add to dashboard Cite

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“…22,[104][105][106] In addition, methods such as the use of a conductive binder, [107][108][109] or the direct growth of the electrode active material on a conductive skeleton in the absence of a binder, [110][111][112][113] are beneficial for reducing the electrode resistivity. [114][115][116][117] The composite electrode materials provide a good platform for the preparation of supercapacitors with excellent performance by compounding various components to obtain a synergistic effect that circumvents the individual shortcomings and realizes the complementary advantages of each component. [118][119][120] Together with the fundamental requirements mentioned above, the electrodes for FSHSCs are expected to meet higher standards such as flexibility, mechanical strength, and formability.…”

Section: The Electrodesmentioning

confidence: 99%

Flexible solid-state hybrid supercapacitors for the internet of everything (IoE)

Lee

Yang

Kim

et al. 2022

Energy Environ. Sci.

124

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“…CNOs are highly conductive, thermally stable, corrosion-resistant, and high surface to volume ratio materials attractive for applications as electrodes in electric double-layer capacitors (EDLCs) . Due to the low energy density and capacity of these nanomaterials, many research groups have attempted to modify CNOs to improve their electrochemical properties and exploit them in the production of supercapacitors. , These attempts involve doping with heteroatoms (i.e., sulfur), addition of a metal oxide active in redox reactions, and covalent functionalization with organic compounds . Importantly, resorcinol–formaldehyde resins with Pluronic as a soft template and CNO addition were prepared, followed by pyrolysis, while their capacitance and resistance were tailored by changing the ratio of CNs to resin …”

Section: Introductionmentioning

confidence: 99%

Polymeric Network Hierarchically Organized on Carbon Nano-onions: Block Polymerization as a Tool for the Controlled Formation of Specific Pore Diameters

Siemiaszko

Hryniewicka

Breczko

et al. 2022

ACS Appl. Polym. Mater.

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The organization of specific pores in carbonaceous three-dimensional networks is crucial for efficient electrocatalytic processes and electrochemical performance. Therefore, the synthesis of porous materials with ordered and well-defined pores is required in this field. The incorporation of carbon nanostructures into polymers can create material structures that are more ordered in comparison to those of the pristine polymers. In this study we applied polymer-templated methods of carbon material preparation, in which outer blocks of the star copolymers form the carbon skeleton, while the core part is pore-forming. Well-defined 6- star -(poly(methyl acrylate)- b -poly(4-acetoxystyrene)) dendrimers were synthesized by reversible addition–fragmentation chain-transfer polymerization. They were then transformed into poly(4-vinylphenol) derivatives (namely 6- star -(poly(methyl acrylate)- b -poly(4-vinylphenol)), subjected to polycondensation with formaldehyde, and pyrolyzed at 800 °C. Cross-linking of phenolic groups provides a polymer network that does not depolymerize by pyrolysis, unlike poly(methyl acrylate) chains. The selected star polymers were attached to carbon nano-onions (CNOs) to improve the organization of the polymer chains. Herein, the physicochemical properties of CNO-polymer hybrids, including the textural and the electrochemical properties, were compared with those of the pristine pyrolyzed polymers obtained under analogous experimental conditions. For these purposes, we used several experimental and theoretical methods, such as infrared, Raman, and X-ray photoelectron spectroscopy, nitrogen adsorption/desorption measurements, scanning and transmission electron microscopy, and electrochemical studies, including cyclic voltammetry. All of the porous materials were evaluated for use as supercapacitors.

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In situ nitrogen-doped carbon nano-onions for ultrahigh-rate asymmetric supercapacitor

Cited by 51 publications

References 49 publications

Superior energy‐power performance of N‐doped carbon nano‐onions‐based asymmetric and symmetric supercapacitor devices

Superior energy‐power performance of N‐doped carbon nano‐onions‐based asymmetric and symmetric supercapacitor devices

Flexible solid-state hybrid supercapacitors for the internet of everything (IoE)

Polymeric Network Hierarchically Organized on Carbon Nano-onions: Block Polymerization as a Tool for the Controlled Formation of Specific Pore Diameters

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