Simultaneous Enhancement of the Electrical Conductivity 
and Seebeck Coefficient of PEDOT-block-PEG/SWCNTs Nanocomposites

Jiang, Qinglin; Liu, Congcong; Zhu, Danhua; Song, Haijun; Xu, Jingkun; Shi, Hui; Mo, Daize; Wang, Zhipeng; Zhu, Zengwei

doi:10.1007/s11664-014-3486-6

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…We plotted the thermopower as a function of electrical conductivity in this work along with literature values separately for composites made of PEDOT and CNT as well as PEDOT-only samples, as shown in Figure c,d. Tables and provide brief details about the samples and the environments during the property measurements. ,,,,,− The data points that appear on the upper part of the plot are more influenced by ionic transport than electronic transport, and those on the right-hand side are mainly from the electronic transport. No data point on the upper right-hand side suggests that simultaneously prominent ionic and electronic conductorswhich could remarkably increase both thermopower and electrical conductivityhave not been found yet.…”

Section: Results and Discussionmentioning

confidence: 99%

Promoting Dual Electronic and Ionic Transport in PEDOT by Embedding Carbon Nanotubes for Large Thermoelectric Responses

Choi

Kim²,

Yi³

et al. 2018

ACS Appl. Mater. Interfaces

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Thermoelectric (TE) energy conversion with nontraditional organic materials is promising in wearable electronics and roll-to-roll manufacturing because of mechanical flexibility, lightweight, and easy processing. Although typical organic materials have a benefit of low thermal conductivity that creates a large temperature gradient, relatively small thermopower (or Seebeck coefficient) often requires copious number of TE legs to fabricate practical TE devices. Here, we show that hybrids of poly(3,4-ethylenedioxythiophene)-tosylate (PEDOT-Tos) and carbon nanotubes (CNTs) can produce extremely large thermopower, ∼14 mV/K at room temperature by a chemical reduction. With decent electrical conductivity, an extraordinary power factor of ∼1200 μW/m K at room temperature was observed. The large power factor could be attributed to prominent dual electronic and ionic conduction, which is likely to be promoted by embedding the CNTs in PEDOT due to the improvement in the carrier mobility, in comparison with the inferior and widely varying TE properties of PEDOT-only samples in the literature. While a higher CNT concentration gave a larger electronic contribution, a longer reduction or a lower CNT concentration provided a larger ionic contribution. Meanwhile, well-separated CNTs created CNT junctions intervened by PEDOT-Tos, suppressing the thermal transport. Further research utilizing the high TE responses could greatly help to develop practical wearable and/or mass-producible thermal energy harvesting and storage devices.

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Section: Results and Discussionmentioning

confidence: 99%

Promoting Dual Electronic and Ionic Transport in PEDOT by Embedding Carbon Nanotubes for Large Thermoelectric Responses

Choi

Kim²,

Yi³

et al. 2018

ACS Appl. Mater. Interfaces

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“…Cho et al obtained high-performance CPC thin films consisting of polyaniline (PANi), graphene, double-walled nanotubes (DWNTs), and PEDOT:PSS by the layer-by-layer (LBL) method [ 28 ]. Rapid progress has been made in CPCs; however, the recently investigated conjugated polymer components are quite limited compared to the conventional conducting polymers, such as PEDOT, PANi, polypyrrole (PPy), polythiophene (PTh), and their derivatives [ 29 , 30 , 31 , 32 , 33 , 34 ]. It is an urgent task to develop new conjugated polymer systems with good thermoelectric performance to better understand the structure–thermoelectric performance relationship, thus furthering the development of polymer-based thermoelectric materials with good performance.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Thermoelectric Properties Study of Bipyridine-Containing Polyfluorene Derivative/SWCNT Composites

et al. 2019

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Polymer/inorganic thermoelectric composites have witnessed rapid progress in recent years, but most of the studies have focused on the traditional conducting polymers. The limited structures of traditional conducting polymers restrain the development of organic thermoelectric composites. Herein, we report the preparation and thermoelectric properties of a series of composites films based on SWCNTs and bipyridine-containing polyfluorene derivatives. The value of the power factor around 12 μW m−1 K−2 was achieved for the composite F8bpy/SWCNTs with a mass ratio of 50/50, and the maximum value of 62.3 μW m−1 K−2 was obtained when the mass ratio reached 10/90. Moreover, taking advantage of the bipyridine unit could chelate various kinds of metal ions to form polymer complexes. The enhanced power factor of 87.3 μW m−1 K−2 was obtained for composite F8bpy-Ni/SWCNTs with a mass ratio of 50/50. Finally, the thermoelectric properties of the bipyridine-containing polyfluorene derivative/SWCNT composites were conveniently tuned by chelating with different metal ions.

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“…Cao et al confirmed that the combination of PEG with tetraaniline was able to form an ion conducting channel and tune the switching time and coloration efficiency of tetraaniline . OEG attached on thiophene polymers has been employed as an electrochromic material with multiple colors. , As a thermoelectric material, the OEG side-chain also has a significant effect on the thermoelectric property compared with the alkyl group . The OEG as a side-chain allows for good optical transparency, processability, and environmental stability as well as high dispersion of polymers in organic solvents .…”

Section: Introductionmentioning

confidence: 99%

Functionalized Poly(3,4-ethylenedioxy bithiophene) Films for Tuning Electrochromic and Thermoelectric Properties

Liu

Jiang

et al. 2017

J. Phys. Chem. B

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Conductive thiophene-based polymers have garnered great attention for use in organic electron materials such as electrochromic and thermoelectric materials. However, they suffer from poor electron transport properties and long-term stability, leading to limited development eventually. Here, we proposed a strategy of functionalized thiophene-based polymers with oligo(ethylene glycol) or alkyl side chains and synthesized a series of poly(3,4-ethylenedioxy bithiophene)s (PEDTs) to tune their electrochromic and thermoelectric properties. An alkyl group bearing electronic ability at the thiophene ring effectively achieved a large increase in the electrical conductivity with nearly invariable Seebeck coefficient, resulting in an enhancement by 1 order of magnitude for the thermoelectric power factor. Moreover, the electrochromic properties of functionalized PEDTs gained an effective improvement in the optical contrast and coloration efficiency as well as stability with multicolor changes between neutral and oxidized states. The functionalized PEDTs can be proposed as an alternative strategy to tune the electrochromic and thermoelectric properties for organic polymer materials.

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Simultaneous Enhancement of the Electrical Conductivity and Seebeck Coefficient of PEDOT-block-PEG/SWCNTs Nanocomposites

Cited by 17 publications

References 34 publications

Promoting Dual Electronic and Ionic Transport in PEDOT by Embedding Carbon Nanotubes for Large Thermoelectric Responses

Promoting Dual Electronic and Ionic Transport in PEDOT by Embedding Carbon Nanotubes for Large Thermoelectric Responses

Preparation and Thermoelectric Properties Study of Bipyridine-Containing Polyfluorene Derivative/SWCNT Composites

Functionalized Poly(3,4-ethylenedioxy bithiophene) Films for Tuning Electrochromic and Thermoelectric Properties

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