Recent Developments in Graphene/Polymer Nanocomposites for Application in Polymer Solar Cells

Díez‐Pascual, Ana M.; Luceño, José A.; Capilla, Rafael Peña; García-Díaz, Pilar

doi:10.3390/polym10020217

Cited by 125 publications

(68 citation statements)

References 80 publications

(109 reference statements)

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“…5 The schematic of hydrothermal polymerization mechanism of rGO/PEDOT the peaks located at 1026 cm −1 , 1137 cm −1 , and 1195 cm − 1 were also observed due to the stretching absorption of C-O-C bond in alkylenedioxy [54,55]. Therefore, comparing the FT-IR spectrum of GO with rGO/PEDOT, the distinct disappearance of -OH (located at 1420 cm −1 ) and C-O-C (located at 887 cm −1 ) absorption was observed, indicating that these two functional groups trigger the polymerization of EDOT primarily during hydrothermal treatment [56].…”

Section: Resultsmentioning

confidence: 90%

Modifying Reduced Graphene Oxide by Conducting Polymer Through a Hydrothermal Polymerization Method and its Application as Energy Storage Electrodes

Chen

et al. 2019

Nanoscale Res Lett

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We report chemical in situ deposition of conducting polymer poly (3,4-ethylenedioxythiophene) (PEDOT) on reduced graphene oxide (rGO) nanosheets through a simple hydrothermal polymerization method. The functional groups on graphene oxide (GO) were directly employed as an oxidant to trigger the polymerization of 3,4ethylenedioxythiophene (EDOT), and the GO nanosheets were reduced into rGO accordingly in an aqueous environment. Well anchoring of ultrathin PEDOT on rGO through this oxidant-free method was confirmed by UV-Vis spectrum, FT-IR spectrum, SEM, and TEM analysis. The obvious enhancement of conductivity was observed after the covering of PEDOT on rGO, and this composite showed high conductivity about 88.5 S/cm. The electrochemical performance results revealed that rGO/PEDOT composite electrode exhibits high specific capacitance about 202.7 F/ g. The good synergetic effect between PEDOT and rGO also makes sure highly stable reversibility of composite electrode during charging/discharging process, and more than 90% initial capacitance retains after 9000 times cycles. In addition, the electrode based on rGO/PEDOT deposited on the cotton fabric shows excellent flexible ability with the evidence that 98% of the initial capacitance of electrode maintained after three thousands of free bending, which shows promising energy storage performance for flexible devices.

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Section: Resultsmentioning

confidence: 90%

Modifying Reduced Graphene Oxide by Conducting Polymer Through a Hydrothermal Polymerization Method and its Application as Energy Storage Electrodes

Chen

et al. 2019

Nanoscale Res Lett

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“…Its electronic properties can be greatly improved by loading conductive fillers, for example, carbon black, graphite, carbon nanotubes, graphene, metallic particle, and so on. Among these conductive fillers, graphene has recently gained importance due to its high aspect ratio, small size, and excellent electrical conductivity . Different methods have been used to fabricate graphene filled PC composites (PC/G) including solution mixing, melt intercalation, and in situ exfoliation .…”

Section: Methodsmentioning

confidence: 99%

Free volume correlation with electrical conductivity of polycarbonate/reduced graphene oxide nanocomposites studied by positron annihilation lifetime spectroscopy

Zhong

Ding

Gao

et al. 2019

J of Applied Polymer Sci

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The reduced graphene oxide (RGO) was added to polycarbonate (PC) through solvent mixing. The influences of RGO on the free volumes and electrical conductivity of PC were systemically studied by positron annihilation lifetime spectroscopy (PALS), Fouriertransform infrared spectroscopy, transmission electron microscope, and electrical conductivity measurements for PC/RGO nanocomposites. The nanosized effect, good conductivity of RGO, and strong interfacial interaction between RGO and PC result in the low conductive threshold of 0.36 wt %. Ten orders of magnitude increase in electrical conductivity was obtained. The results of PALS indicate the properties of free volumes fluctuate around the conductive percolation threshold. The conformational change of PC segments in the interfacial region induced by the strong interfacial interaction leads to an increase in free volume radius. The concentration of free volume decreases due to the depression of free volume holes as the introduction of RGO. Significantly, an exponential function is proposed to describe the effect of relative fractional free volume on the electrical conductivity, suggesting that free volume plays an important role in regulating electrical conductivity of PC/RGO. The physical quantity f d that refers required fractional free volume of polymer composites from insulating to conducting phase is found.

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“…As already reported in various papers of our group , one the most widely diffused techniques for the preparation of conductive composites is the dispersion of nanostructured conductive fillers within polymer matrices. In this sense, graphene seems to be one of the most interesting conductive nanofillers , because of its combination of outstanding mechanical and functional properties . To overcome the problem of the dispersion of graphene layers within the polymer matrices , particular attention has been recently devoted to graphene oxide (GO) .…”

Section: Introductionmentioning

confidence: 99%

Novel electroactive polyamide 12 based nanocomposites filled with reduced graphene oxide

Dorigato

Pegoretti

2018

Polymer Engineering & Sci

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Novel electroactive nanocomposites were prepared by adding to a polyamide 12 (PA12) matrix different amounts (from 1 to 8 wt%) of reduced graphene oxide (rGO), and the thermo-electrical behavior of the prepared bulk materials was compared with that of the corresponding fibers. FESEM micrographs on bulk materials highlighted an evident aggregation of the rGO lamellae, proportional to the filler concentration. The presence of rGO stacks was responsible of a heavy embrittlement of the samples, with a strong reduction of the elongation at break, and of the limited electrical conductivity of the samples (about 10 5 XÁcm with a rGO amount of 4 wt%). Moreover, nanofiller addition determined an improvement of the thermal degradation resistance, associated to a slight drop of the glass transition temperature (about 78C with a nanofiller concentration of 4 wt%) and of the crystallinity degree (up to 9% for an rGO loading of 4 wt%). The extrusion process adopted to prepare nanocomposite fibers caused a partial breakage of rGO aggregates and their progressive alignment along the drawing direction, determining thus an electrical resistivity increase with respect to the bulk samples. Therefore, the surface heating of the prepared fibers through Joule effect was possible only at elevated rGO amounts (i.e., 8 wt%). POLYM. ENG. SCI., 00:000-000, FIG. 9. Surface temperature evolution of the PA12-rGO-8 fiber with DR 5 3 with an applied voltage of 200 V and 220 V.

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Recent Developments in Graphene/Polymer Nanocomposites for Application in Polymer Solar Cells

Cited by 125 publications

References 80 publications

Modifying Reduced Graphene Oxide by Conducting Polymer Through a Hydrothermal Polymerization Method and its Application as Energy Storage Electrodes

Modifying Reduced Graphene Oxide by Conducting Polymer Through a Hydrothermal Polymerization Method and its Application as Energy Storage Electrodes

Free volume correlation with electrical conductivity of polycarbonate/reduced graphene oxide nanocomposites studied by positron annihilation lifetime spectroscopy

Novel electroactive polyamide 12 based nanocomposites filled with reduced graphene oxide

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