Flexible all-solid-state high-performance supercapacitor based on electrochemically synthesized carbon quantum dots/polypyrrole composite electrode

Jian, Xuan; Yang, Huimin; Li, Jiagang; Zhang, Erhui; Cao, Lele; Zhen, Liang

doi:10.1016/j.electacta.2017.01.082

Cited by 128 publications

(46 citation statements)

References 41 publications

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“…The interest in C‐Dots based nanocomposites has been demonstrated by the recent literature. As an example, Jian et al prepared nanocomposites of C‐Dots with polypyrrole as an electrode by an efficient and controllable potentiostatic electropolymerization method. In such work, theC‐Dots can play a supporting electrolyte role during the electropolymerization process.…”

Section: Introductionmentioning

confidence: 99%

Thermal properties and electric modulus approach to the analysis of dielectric relaxation of nanocomposites based on carbon dots

et al. 2019

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The investigation of thermal and dielectric properties of carbon dots dispersed in PMMA has been conducted in freestanding thin solid films. Thermal properties were studied using differential scanning calorimetry. Impedance spectroscopy, in the frequency range 100 Hz to 100 kHz and temperatures between 200 and 390 K, was used for the electrical characterization. Using the electric modulus formalism, it has been found that the Havriliak‐Negami model of dielectric relaxation is adequate to fit the experimental data, from which the relaxation parameters can be calculated. The inclusion of C‐Dots in PMMA provides a plasticizing effect on the polymer structure, giving rise to an increase in the mobility of PMMA chains, and consequent changes in the relaxation parameters.

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Section: Introductionmentioning

confidence: 99%

Thermal properties and electric modulus approach to the analysis of dielectric relaxation of nanocomposites based on carbon dots

et al. 2019

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“…38 The characteristic peaks appear in the spectra of GN/AC composite lm at 1589 cm À1 and 1243 cm À1 are attributed to C]C and C-O-stretching vibration, respectively. As respected, in the spectra of GN/AC/PPy 15 -200 s, the peaks at 1724, 1589, 1433, 1356, 1201 and 991 cm À1 are associated with the C]O, C]C, C-N stretching vibration, C-N in-plane deformation, and C-H deformation vibration in the pyrrole ring, respectively, 19 which indicated that the PPy successfully deposited onto the surface of GN/AC lm via electrochemical polymerization method. Fig.…”

Section: Morphology and Structure Characterizationmentioning

confidence: 78%

“…The highest C s reaches 906 mF cm À2 with the corresponding mass specic capacitance of 178 F g À1 . Evidently, the specic capacitance are much higher than other composites, such as CQDs/PPy (315 mF cm À2 ), 19 PPy/GO (152 mF cm À2 ), 38 PPy/bacterial cellulose (153 F g À1 ). 46 The Nyquist plot of three different electrode materials are shown in Fig.…”

Section: Comparison Of Electrode Materialsmentioning

confidence: 92%

“…The obtained composites can be used as electrode material and electrochemically measured directly. 18 Flexible substrates, such as stainless steel wire meshes, [19][20][21] cotton textile, 22 carbon cloth [23][24][25] and other carbon-based paper, have been widely used to construct exible electrodes. Activated carbons (ACs), as the earliest and the most widely application of electrode materials, possess the characteristics of porous carbon structure, easy processability, low-price, renewable, environmental friendliness, higher specic surface area and electrochemical stability.…”

Section: Introductionmentioning

confidence: 99%

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Design and synthesis of graphene/activated carbon/polypyrrole flexible supercapacitor electrodes

Jia

et al. 2017

RSC Adv.

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A ternary composite of graphene/activated carbon/polypyrrole (GN/AC/PPy) used as an electrode active material for supercapacitors has been synthesized via vacuum filtration and anodic constant current deposition methods. The ACs sandwiched between GN sheets can be used as flexible substrates for PPy nanoparticles, and the microscopic morphologies and electrochemical performances of GN/AC/PPy electrodes were synthesized and designed through regulating different deposition current densities and deposition times. The GN/AC/PPy 15 -200 s electrode exhibits a maximum areal specific capacitance of 906 mF cm À2 with a PPy loading mass of 2.75 mg cm À2 (specific capacitance of 178 F g À1 ) at a current density of 0.5 mA cm À2 . Its capacitance retention still remained at 64.4% after 5000 charge-discharge cycles and 83.6% after 500 stretching-bending cycles at a current density of 3 mA cm À2 . The flexible, free-standing and binder-free GN/AC/PPy electrodes have a broad prospect in flexible energy storage devices. Fig. 4 (a) GCD curves of all samples at the current density of 1 mA cm À2 ; (b) CV curves of samples at the scan rate of 10 mV s À1 ; (c) areal specific capacitances of all samples at different current densities; (d) Nyquist plot of all samples.This journal is

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“…The major component at 399.8 eV is assigned to neutral pyrrolinium nitrogen (NÀ H). [23] It is noticed that the existence of the characteristic peak of À N + at a BE of 401.0 eV indicated the PPy component in the oxidized state. [24,25] Both of the Raman and XPS analysis demonstrates the successful polymerization of PPy.…”

Section: Resultsmentioning

confidence: 99%

A Porous and Interconnected Polypyrrole Film with High Conductivity and Ion Accessibility as Electrode for Flexible All‐Solid‐State Supercapacitors

et al. 2019

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Nanoporous electrodes with high electrical conductivity and good mechanical properties are attractive for high-performance flexible supercapacitors. In this work, we report a flexible polypyrrole (PPy) film electrode synthesized by a modified versatile vapor-phase polymerization (VPP) strategy. Differing from conventional VPP protocols that are likely to form smooth polymer films, it could easily engineer the PPy film with porous and interconnected structure by simply optimizing the concentration of oxidant and the polymerization time. The film electrode showed an exceptionally high electrical conductivity up to 94 S cm À 1 . The unique porous PPy films constructed by interconnected electronic/ionic conductive networks achieved a specific capacitance of 494 F g À 1 (corresponding to 836 mF cm À 2 ) at a current density of 1 A g À 1 . The fabricated all-solid-state supercapacitor device with the PPy electrodes exhibited a specific capacitance of 300 F g À 1 at 1 A g À 1 and a high energy density of 26.67 kW kg À 1 . The high electrochemical performance and outstanding mechanical properties present the film electrode promising potential for flexible energy devices in various applications.

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Flexible all-solid-state high-performance supercapacitor based on electrochemically synthesized carbon quantum dots/polypyrrole composite electrode

Cited by 128 publications

References 41 publications

Thermal properties and electric modulus approach to the analysis of dielectric relaxation of nanocomposites based on carbon dots

Thermal properties and electric modulus approach to the analysis of dielectric relaxation of nanocomposites based on carbon dots

Design and synthesis of graphene/activated carbon/polypyrrole flexible supercapacitor electrodes

A Porous and Interconnected Polypyrrole Film with High Conductivity and Ion Accessibility as Electrode for Flexible All‐Solid‐State Supercapacitors

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