Synthesis of rGO/TiO2/PEDOT nanocomposites, supercapacitor device performances and equivalent electrical circuit models

Ateş, Murat; Bayrak, Yüksel; Özkan, Haydar; Yörük, Ozan; Yildirim, Murat Onur; Kuzgun, Ozge

doi:10.1007/s10965-018-1692-2

Cited by 24 publications

(6 citation statements)

References 80 publications

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“…Figure b shows the FTIR spectra of the pristine and doped PEDOT:PSS films. The band at 1550 cm −1 can be assigned to the CC stretching vibration from thiophene ring . After doping by acids, the band at 1550 cm −1 of H 2 SO 4 and H 3 PO 4 doped films is absent, which indicate a small number of PEDOT chains were removed by EtOH if phase separation occurred.…”

Section: Resultsmentioning

confidence: 99%

The Role of Mineral Acid Doping of PEDOT:PSS and Its Application in Organic Photovoltaics

Zhang

Yang

Chen

et al. 2019

Adv Elect Materials

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Poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is one of the most successful conducting polymers in terms of commercialization. A method to readily obtain highly conductive and transparent PEDOT:PSS films is urgently needed. A simple method is introduced to enhance the conductivity of such films dramatically. By adding a series of mineral acids into the PEDOT:PSS aqueous solution directly, the conductivity is enhanced by 3–4 orders of magnitude. Mechanistic study reveals that the conductivity enhancement is dependent on boiling point, pKa value, softness parameter, and oxidability of the dopant acid. Specifically, acids with high boiling point, low pKa, and low softness parameter are able to induce phase separation between PEDOT and PSS, leading to secondary doping. If the dopant acid exhibits strong oxidability, the conductivity can also be enhanced via primary doping. H2SO4‐doped PEDOT:PSS films exhibit the highest conductivity of 2244 S cm−1. These films are employed as the transparent electrodes of poly(3‐hexylthiophene‐2,5‐diyl) (P3HT)‐based organic photovoltaic cells, and the power conversation efficiency reaches 3.13%. These results suggest direct acid doping of PEDOT:PSS solution is a facile approach to obtain highly flexible transparent electrodes.

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Section: Resultsmentioning

confidence: 99%

The Role of Mineral Acid Doping of PEDOT:PSS and Its Application in Organic Photovoltaics

Zhang

Yang

Chen

et al. 2019

Adv Elect Materials

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“… 13 , 24 − 34 Still much higher capacitance values can be achieved if metal oxides are incorporated into the structure. 32 , 35 − 38 The wide spread of the reported values underlines the sensitivity of the measured film capacitance on its composition and structure and the fabrication and measurement techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Even though GO is electrically insulating, it can easily be reduced to a conductive form (reduced graphene oxide, rGO), which can improve the film conductivity. Hybrid films containing carbon nanotubes or graphene-based materials generally display specific capacitance values of around 100–200 F g –1 , but some values outside of this range have also been reported. ,− Still much higher capacitance values can be achieved if metal oxides are incorporated into the structure. ,− The wide spread of the reported values underlines the sensitivity of the measured film capacitance on its composition and structure and the fabrication and measurement techniques.…”

Section: Introductionmentioning

confidence: 99%

Oxidative Spin-Spray-Assembled Coordinative Multilayers as Platforms for Capacitive Films

et al. 2020

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The spin-spray-assisted layer-by-layer (LbL) assembly technique was used to prepare coordinative oxidative multilayers from Ce(IV), inorganic polyphosphate (PP), and graphene oxide (GO). The films consist of successive tetralayers and have a general structure (PP/Ce/GO/Ce) n . Such oxidative multilayers have been shown to be a general platform for the electrodeless generation of conducting polymer and melanin-type films. Although the incorporation of GO enhances the film growth, the conventional dip LbL method is very time consuming. We show that the spin-spray method reduces the time required to grow thick multilayers by the order of magnitude and the film growth is linear from the beginning, which implies a stratified structure. We have deposited poly(3,4-ethylenedioxothiophene), PEDOT, on the oxidative multilayers and studied these redox-active films as models for melanin-type capacitive layers for supercapacitors to be used in biodegradable electronics, both before and after the electrochemical reduction of GO to rGO. The amount of oxidant and PEDOT scales linearly with the film thickness, and the charge transfer kinetics is not mass transfer-limited, especially after the reduction of GO. The areal capacitance of the films grows linearly with the film thickness, reaching a value of ca . 1.6 mF cm –2 with 20 tetralayers, and the specific volumetric (per film volume) and mass (per mass of PEDOT) capacitances are ca . 130 F cm –3 and 65 F g –1 , respectively. 5,6-Dihydroxyindole can also be polymerized to a redox-active melanin-type film on these oxidative multilayers, with even higher areal capacitance values.

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“…This inclusion increases the specific capacitance to 652 F/g at 1 mV/s in a ratio of [rGO]/[TiO 2 ] = 1/5. Another result for SC varied depending on the content of filler, that is, [rGO]/[TiO 2 ] = 1/2 (SC = 475.33 F/g), [rGO]/[TiO 2 ] = 1/1 (SC = 48.02 F/g), rGO/PEDOT (SC = 114.09 F/g), which demonstrates the distinct possibilities of this new nanocomposite to be incorporated as future supercapacitor application [139]. Gupta et al replaced TiO 2 with Mn ferrite (MnFe 2 O 4 ) by an in situ polymerization, obtaining a material with EDLC and pseudocapacitive behavior with a good specific capacitance of 298.97 F/g at 1 A/g, and retention of these values at 81% over 5000 cycles.…”

Section: Supercapacitorsmentioning

confidence: 99%

Polymer-Magnetic Semiconductor Nanocomposites for Industrial Electronic Applications

et al. 2022

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Nanocomposite materials have acquired great importance, as have similar composite materials on a macroscopic scale, because the reinforcement complements the defects in the properties of the matrix, thus obtaining materials with better mechanical, thermal, and electrical properties, among others. At the same time, the importance and research of polymeric nanocomposites reinforced with nanoparticles of various types have grown. Among those that have stood out the most in the electronics industry are polymeric matrices reinforced with nanoparticles that present dual behavior, that is, both magnetic and semiconductor. This property has been very well used in developing electronic devices such as televisions, computers, and smartphones, which are part of everyday life. In this sense, this review presents a compilation of the synthetic methods to produce polymer nanocomposites with dual magnetic and semiconductor behavior and their potential applications within electronic fields and new relevant trends.

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Synthesis of rGO/TiO2/PEDOT nanocomposites, supercapacitor device performances and equivalent electrical circuit models

Cited by 24 publications

References 80 publications

The Role of Mineral Acid Doping of PEDOT:PSS and Its Application in Organic Photovoltaics

The Role of Mineral Acid Doping of PEDOT:PSS and Its Application in Organic Photovoltaics

Oxidative Spin-Spray-Assembled Coordinative Multilayers as Platforms for Capacitive Films

Polymer-Magnetic Semiconductor Nanocomposites for Industrial Electronic Applications

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