Conducting polypyrrole with nanoscale hierarchical structure

Han, Yongqin; Qing, Xutang; S, Ye; Lu, Yun

doi:10.1016/j.synthmet.2010.03.002

Cited by 41 publications

(23 citation statements)

References 37 publications

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“…The strong peak at 2Q ¼ 9.78 in GO implies the successful synthesis of GO. We previously reported that pristine PPy exhibits a broad diffraction peak around 2Q ¼ 25 , indicating that the PPy is basically amorphous in nature [38]. It is evident from the XRD pattern of the GPy that the intensity of the peak of GO becomes very weak and a new peak at 2Q ¼ 25 is observed, which indicates that GO are almost reduced to graphene.…”

Section: Resultsmentioning

confidence: 90%

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Han

Wang

et al. 2017

Carbon

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Section: Resultsmentioning

confidence: 90%

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Han

Wang

et al. 2017

Carbon

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“…[136][137][138] However, the low cycling stability and poor rate performance of supercapacitors based on pristine PPy drastically limit their practical applications. To improve the REVIEW performance of PPy-based supercapacitors, we synthesized composite films of SG and PPy through an electrocodeposition process.…”

Section: Graphene/pani Compositesmentioning

confidence: 99%

Graphene/polymer composites for energy applications

Sun

Shi

2012

J Polym Sci B Polym Phys

236

120

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Graphene has wide potential applications in energyrelated systems, mainly because of its unique atom-thick twodimensional structure, high electrical or thermal conductivity, optical transparency, great mechanical strength, inherent flexibility, and huge specific surface area. For this purpose, graphene materials are frequently blended with polymers to form composites, especially when fabricating flexible devices. Graphene/polymer composites have been explored as electrodes of supercapacitors or lithium ion batteries, counter electrodes of dye-sensitized solar cells, transparent conducting electrodes and active layers of organic solar cells, catalytic electrodes, and polymer electrolyte membranes of fuel cells. In this review, we summarize the recent advances on the synthesis and applications of graphene/polymer composites for energy applications. The challenges and prospects in this field have also been discussed. V C 2012 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 231-253 KEYWORDS: composites; energy; fuel cell; graphene; lithium ion battery; redox polymers; solar cell; supercapacitor; synthesis INTRODUCTION Energy is one of the most important recent topics of concern to human society. To replace conventional fossil fuels, clean and renewable energies based on sunlight, wind, new chemicals, and biofuels are urgently demanded. Therefore, materials that can directly convert or store renewable energies are being extensively studied. Among them, graphene has recently attracted a great deal of attention because of its unique atom-thick two-dimensional (2D) structure 1,2 and excellent electrical, 2 thermal, 3 optical, and mechanical properties. 4,5 Graphene is a promising material for applications in various energy-related systems such as supercapacitors, 6-9 secondary batteries, 10-14 solar cells, 15-17 and fuel cells. [18][19][20] For this purpose, graphene materials are frequently blended with polymers to form functional composites. [21][22][23] The polymer component can improve the processability and/or flexibility of graphene materials, and also possibly provide them with new functions. To date, various graphene composites with insulating or conducting polymers (CPs) have been prepared through noncovalent 22 or covalent approaches. 24 They have also been applied as electrodes for supercapacitors and lithium ion batteries (LIBs), 25-29 counter electrodes of dye-sensitized solar cells (DSSCs), 15,30,31 and transparent conducting electrodes (TCEs) 32,33 or active layers of organic solar cells, 34 catalytic electrodes, and polymer electrolyte membranes of fuel cells. [35][36][37] This review focuses on summarizing the recent advances in the synthesis of graphene/polymer composites and their energy applications.

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“…Among all of pseudocapacitor electrode materials, conducting polymers attract great deal of interest due to their fast charge-discharge kinetics, low cost, and fast redox process [4]. Polypyrrole (PPy) is one of the most promising electrode materials of pseudocapacitor due to its high electric conductivity in doped state, high specific capacitance, and facile synthesis [5]. However, during the redox process, PPy undergoes swelling, shrinkage, and cracking or breaking, which induce gradually deterioration of the conductivity and volumetric changes leading to poor cycle stability [6].…”

Section: Preparation Of Graphene/polypyrrole Composite Film Via Electmentioning

confidence: 99%

Preparation of Graphene/Polypyrrole Composite Film via Electrodeposition for Supercapacitors

Feng

Zhang

et al. 2012

IEEE Trans. Nanotechnology

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Graphene/polypyrrole (PPy) composite film was prepared by simple electrodeposition of graphite oxide and pyrrole mixture under acid conditions. The morphology, composition, and electronic structure of the composites were characterized by using transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectrometer, X-ray diffraction, and X-ray photoelectron spectroscopy. Based on the fast redox property of PPy and high conductivity of graphene, the prepared composite film could be constructed to a supercapacitor device directly. The electrochemical performances of the supercapacitor were investigated by cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The composites showed better electrochemical performances than the individual components. A high specific capacitance of 335 F·g −1 was obtained with the capacitance retention of 85% after 1000 cycles at a current density of 1 A·g −1 by charge-discharge analysis between 0 and +1.0 V. The enhanced specific capacitance and cycling life implied a synergistic effect of graphene and PPy.

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Conducting polypyrrole with nanoscale hierarchical structure

Cited by 41 publications

References 37 publications

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Preparation and electrochemical performances of graphene/polypyrrole nanocomposite with anthraquinone-graphene oxide as active oxidant

Graphene/polymer composites for energy applications

Preparation of Graphene/Polypyrrole Composite Film via Electrodeposition for Supercapacitors

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