<i>In situ</i> nitrogen-doped mesoporous carbon nanofibers as flexible freestanding electrodes for high-performance supercapacitors

Tan, Jian; Han, Ya Fang; He, Liang; Dong, Yixiao; Xu, Xu; Liu, Dongna; Yan, Haowu; Yu, Qiang; Huang, Can; Mai, Liqiang

doi:10.1039/c7ta07024a

Cited by 97 publications

(54 citation statements)

References 59 publications

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“…The corresponding galvanostatic charge‐discharge (GCD) curves of as‐synthesized samples at a current density of 1 A g −1 were plotted in Figure b. The typical triangular shape of the GCD curves with slight distortion confirms the existence of pseudocapacitive behavior . According to the GCD curves (Figure b), NNCN‐800 obviously demonstrates the largest discharge time at the same current density that agrees well with the CV result.…”

Section: Resultssupporting

confidence: 74%

One‐Step Pyrolysis to Synthesize Non‐Graphitic Nitrogen‐Doped 2D Ultrathin Carbon Nanosheets and Their Application in Supercapacitors

Guo

Zhou

Pang³

et al. 2019

ChemElectroChem

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Non‐graphitic nitrogen plays a significant role in determining the electrochemical performance of carbon materials in the field of energy storage. However, the synthesis of carbon materials with a high level of non‐graphitic nitrogen doping is still a great challenge. In this paper, a facile one‐step pyrolysis approach was developed to synthesize 2D carbon nanosheets with a ultrahigh non‐graphitic nitrogen content. Through an ingenious design, g‐C3N4 and NH3, both generated during the pyrolysis process, play major roles in the generation of the non‐graphitic nitrogen‐doped carbon nanosheets. The intermediate g‐C3N4 acts as both a self‐sacrificial template and a nitrogen source, whereas NH3 offers a nitrogen‐enriched chemical atmosphere. Benefiting from the high pyridinic‐nitrogen content of the maternal g‐C3N4 and the reductive atmosphere of NH3, the as‐prepared carbon nanosheets exhibit a strikingly high non‐graphitic nitrogen content (up to 17.36 wt.%); also, thanks to the g‐C3N4 self‐sacrificial template, the as‐synthesized carbon nanosheets are 2D with an ultrathin thickness (3–4 nm) and a porous structure. These novel features make the as‐prepared carbon nanosheets an excellent supercapacitor electrode material in terms of superior specific capacitance (316.8 F g−1 at 1 A g−1), excellent cycling stability (without obvious capacitance loss after 10 000 cycles at 10 A g−1) and high energy density (up to 10.56 Wh kg−1 at a power density of 500 W kg−1). This work provides a new idea to prepare non‐graphitic nitrogen enriched carbon materials.

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Section: Resultssupporting

confidence: 74%

One‐Step Pyrolysis to Synthesize Non‐Graphitic Nitrogen‐Doped 2D Ultrathin Carbon Nanosheets and Their Application in Supercapacitors

Guo

Zhou

Pang³

et al. 2019

ChemElectroChem

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“…[39,40] Similarly, the measured peak current with the scan rate ( Figure S4, Supporting Information) fits linearly to the equation (Y = A + (B*X)) obtaining an adjacent R-square value of 0.99568 and 0.99192 for anodic and cathodic respectively substantiating participation of EDLC mechanism in the charge storage process. [44][45][46][47][48][49][50][51][52][53] The current density versus capacity plot given in Figure 5e shows that around 87% of the initial capacity of the electrode was retained after a substantially high current density of 10 A g −1 . The discernible plateau region of the GCD curve authenticates the CV curve, inferring the battery behavior of the NiCoP particles encapsulated CNF.…”

Section: Electrochemical Properties Of Nicop/cnfs As Positive Electrodementioning

confidence: 99%

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

Surendran

Shanmugapriya

Sivanantham

et al. 2018

Advanced Energy Materials

276

148

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Functionalizing nanostructured carbon nanofibers (CNFs) with bimetallic phosphides enables the material to become an active electrode for multifunctional applications. A facile electrospinning technique is utilized for the first time to develop NiCoP nanoparticles encapsulated CNFs that are used as an energy storage system of supercapattery, and as an electrocatalyst for oxygen reduction, oxygen evolution, and hydrogen evolution reaction in KOH electrolyte. Evolving from the inclusion of bimetallic phosphide nanoparticles, the NiCoP/CNF electrode unveils superior‐specific capacitance (333 Fg−1 at 2 Ag−1) and rate capability (87%). The fabricated supercapattery device offers a voltage of 1.6 V that supplies a remarkable energy density (36 Wh kg−1) along with an improved power density (4000 W kg−1) and unwavering cyclic stability (25 000 cycles). Meanwhile, the NiCoP/CNF electrode has simultaneously performed well as a multifunctional electrocatalyst for oxygen reduction reaction at a half‐wave potential of 0.82 V versus reversible hydrogen electrode and can attain a current density of 10 mA cm−2 at a very low overpotential of 268 and 130 mV for the oxygen evolution reaction and hydrogen evolution reaction, respectively. Thus, the NiCoP/CNF with all its inimitable electrode properties has profoundly proved its proficiency at handling multifunctional challenges in terms of both storage and conversion.

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“…[7] The basic setupo fe lectrospinning can be found in previous reports. Unfortunately,o nly af ew polymers could derivec arbon fibers with good flexibility after pyrolysis, includingp olyacrylonitrile (PAN), [10] polyvinylpyridine (PVP), [7] polyimide (PI), [11] and apolymer of intrinsic microporosity (PIM), [12] of whichP AN is most commonly used. By tuning the electrospinning process parameters, such as the nature of the polymer solution, viscosity,f low rate, and voltage, nanofibers with controllable morphologies and structures (e.g.,h ollow,c ore-shell, porous, or multichannel) can be easily obtained.…”

Section: Electrospinningmentioning

confidence: 99%

Recent Advances in Nanowire‐Based, Flexible, Freestanding Electrodes for Energy Storage

Liu

et al. 2018

Chemistry A European J

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The rational design of flexible electrodes is essential for achieving high performance in flexible and wearable energy-storage devices, which are highly desired with fast-growing demands for flexible electronics. Owing to the one-dimensional structure, nanowires with continuous electron conduction, ion diffusion channels, and good mechanical properties are particularly favorable for obtaining flexible freestanding electrodes that can realize high energy/power density, while retaining long-term cycling stability under various mechanical deformations. This Minireview focuses on recent advances in the design, fabrication, and application of nanowire-based flexible freestanding electrodes with diverse compositions, while highlighting the rational design of nanowire-based materials for high-performance flexible electrodes. Existing challenges and future opportunities towards a deeper fundamental understanding and practical applications are also presented.

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In situ nitrogen-doped mesoporous carbon nanofibers as flexible freestanding electrodes for high-performance supercapacitors

Abstract: In situ N-doped mesoporous carbon nanofibers synthesized by depositing magnesium hydroxide (Mg(OH)2) into polyacrylonitrile (PAN) nanofibers and combining carbonization with etching process exhibit excellent supercapacitive performance.

Cited by 97 publications

References 59 publications

One‐Step Pyrolysis to Synthesize Non‐Graphitic Nitrogen‐Doped 2D Ultrathin Carbon Nanosheets and Their Application in Supercapacitors

One‐Step Pyrolysis to Synthesize Non‐Graphitic Nitrogen‐Doped 2D Ultrathin Carbon Nanosheets and Their Application in Supercapacitors

Electrospun Carbon Nanofibers Encapsulated with NiCoP: A Multifunctional Electrode for Supercapattery and Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution Reactions

Recent Advances in Nanowire‐Based, Flexible, Freestanding Electrodes for Energy Storage

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