Free-standing microporous paper-like graphene films with electrodeposited PPy coatings as electrodes for supercapacitors

Jiang, Lili; Li, Xiong; Xu, Jielong; Chen, Yingqi; Wan, Guojiang; Ding, Yonghui

doi:10.1007/s10854-014-2459-0

Cited by 13 publications

(13 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Helinando et al 14 used in situ oxidative polymerization process to produce PPy in the presence of functionalized graphene sheets to obtain a free-standing, high-quality composite electrode materials for supercapacitors. In our previous work, 15 free-standing and microporous graphene based electrodes were produced and a PPy layer was deposited on the surface of graphene electrode through electrooxidation and electrodeposition process. The results shows the improvement of conductivity and capacitance after the electrodeposition of PPy.…”

Section: Introductionmentioning

confidence: 99%

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

et al. 2015

Self Cite

View full text Add to dashboard Cite

Flexible, free-standing titania−graphene−polypyrrole (TiO 2 −G−PPy) composite films as electrodes for supercapacitors were reported in this study, which harness the advantage of both PPy and TiO 2 . First, titania precursor and graphene oxide (GO) composite films were prepared by the directly mixing and drying strategy. Second, the hydriodic acid (HI) reduction process were employed to reduce GO to obtain graphene/titania precursor composite films. Third, heat treatments at different temperatures were carried out to obtain TiO 2 −G composite films with different titania crystalline phases. Finally, PPy was deposited on the surface of the as-prepared TiO 2 −G to form three-phase composite films. The introduction of TiO 2 remarkably improves the pseudocapacitance and electrochemical stability of G based electrodes. The highest capacitance was obtained with the TiO 2 content of 14.6%. The PPy coating also improves the capacitance of G−PPy composite electrodes. The role of PPy lies more in the improvement of conductivity, which increases the current density of electrodes under working condition. However, the introduction of PPy decreases the electrochemical stability of composite electrodes. The extremely high capacitance and good electrochemical stability of TiO 2 −G−PPy composite electrodes reveals that there are synergistic effects of TiO 2 and PPy on the composites. Different TiO 2 phases do not have remarkable effects on capacitance of the TiO 2 −G system. After coated with PPy, different TiO 2 phases exhibit different behaviors. Anatase−G−PPy has high capacitance whereas rutile−G−PPy has good stability. TiO 2 −G−PPy heat-treated at 500°C has the mixed TiO 2 phases, and therefore has both high capacitance and good stability.

show abstract

Section: Introductionmentioning

confidence: 99%

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…These CV profiles maintain similar shapes at different scan rates, although they show an increased leaning angle to the voltage axis with an increasing scan rate. This phenomenon demonstrates that the electrodes have a low equivalent series resistance and that ions can efficiently diffuse between the electrolyte and the electrodes . As shown in Figure d, the CV profiles of each sample at a scan rate of 5 mV s −1 reveal their significant difference.…”

Section: Resultsmentioning

confidence: 81%

“…GO solution and GO films were synthesized using a modified Hummer's method and by direct heating at 70 °C for 12 h, respectively. The details have been reported previously [8,13a,18]…”

Section: Methodsmentioning

confidence: 99%

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Jiang

Luo

et al. 2019

Energy Tech

Self Cite

View full text Add to dashboard Cite

Supercapacitors are of great importance for energy storage and have been the subject of intensive research in recent years, in which conductive polymers are used to make flexible and freestanding electrodes. However, their insufficient access to the electrolytes and the low chemical stability of these conductive polymers lead to their poor performance. To solve these issues, a facile method that can be used to synthesize freestanding composite film electrodes of reduced graphene oxide–cobalt oxide–polypyrrole (RGO—Co3O4—PPy) as supercapacitors is demonstrated. They exhibit a high specific capacitance of 532.8 F g−1 and nearly no degradation after 700 cycles of charging and discharging. The synergistic effect of Co3O4, RGO, and PPy is responsible for the superior property. The three‐phase composite electrode utilizes the RGO nanosheet as a substrate to provide a large surface area for loading Co3O4 nanoparticles and also to enhance the electron transfer. Furthermore, the deposition of PPy largely reduces the resistivity of RGO—Co3O4—PPy, and the introduction of Co3O4 nanoparticles significantly improves cycle stability.

show abstract

“…Despite its advantages, PECVD methods have a major drawback that large area graphene is hardly achievable in such methods. This was explained by the fact that the high electrical field aligned perpendicular to the surface prevents planar growth of graphene and leads to vertically standing graphene sheets [83,89].…”

Section: Chemical Vapor Deposition (Cvd)mentioning

confidence: 99%

“…Scientists have recently utilized graphene as an excellent platform for flash memory, one that may indeed help overcome several challenges faced by current industry standards [178]. Graphene supercapacitors that could be used as batteries also have shown promising results in some studies [89,179]. Silver nanoparticle decorated graphene films for adhesive conductives is another recent application found for graphene [180].…”

Section: Graphene-on-graphene Modulatormentioning

confidence: 99%

Graphene synthesis, characterization and its applications in nanophotonics, nanoelectronics, and nanosensing

Akbar

Kolahdouz

Larimian

et al. 2015

J Mater Sci: Mater Electron

109

View full text Add to dashboard Cite

In the last decade, as semiconductor industry was approaching the end of the exponential Moore's roadmap for device downscaling, the necessity of finding new candidate materials has forced many research groups to explore many different types of non-conventional materials. Among them, graphene, CNTs and organic conductors are the most successful alternatives. Finding a material with metallic properties combined with field effect characteristics on nanoscale level has been always a dream to continue the ever-shrinking road of the nanoelectronics. Due to its fantastic features such as high mobility, optical transparency, room temperature quantum Hall effect, mechanical stiffness, etc. the atomically thin carbon layer, graphene, has attracted the industry's attention not only in the micro-, nano-, and opto-electronics but also in biotechnology. This paper reviews the basics and previous works on graphene technology and its developments. Compatibility of this material with Si processing technology is its crucial characteristic for mass production. This study also reviews the physical and electrical properties of graphene as a building block for other carbon allotropes. Different growth methods and a wide range of graphene's applications will be discussed and compared. A brief comparison on the performance result of different types of devices has also been presented. Until now, the main focus of research has been on the background physics and its application in electronic devices. But, according to the recent works on its applications in photonics and optoelectronics, where it benefits from the combination of its unique optical and electronic properties, even without a bandgap, this material enables ultrawide-band tunability.Here in this article we review different applications and graphene's advantages and drawbacks will be mentioned to conclude at the end.

show abstract

Free-standing microporous paper-like graphene films with electrodeposited PPy coatings as electrodes for supercapacitors

Cited by 13 publications

References 28 publications

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors

Graphene synthesis, characterization and its applications in nanophotonics, nanoelectronics, and nanosensing

Contact Info

Product

Resources

About

Free-standing microporous paper-like graphene films with electrodeposited PPy coatings as electrodes for supercapacitors

Cited by 13 publications

References 28 publications

Flexible, Free-Standing TiO2–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Flexible, Free-Standing TiO2–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co3O4—PPy Composite Films as Electrodes for Supercapacitors

Graphene synthesis, characterization and its applications in nanophotonics, nanoelectronics, and nanosensing

Contact Info

Product

Resources

About

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Flexible, Free-Standing TiO₂–Graphene–Polypyrrole Composite Films as Electrodes for Supercapacitors

Freestanding RGO—Co₃O₄—PPy Composite Films as Electrodes for Supercapacitors