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Issue 22, 2019
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PEDOT thermoelectric composites with excellent power factors prepared by 3-phase interfacial electropolymerization and carbon nanotube chemical doping

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Abstract

Compared with common chemical oxidation polymerization reactions, the electrochemical polymerization method has seldom been employed for the preparation of high-performance polymer thermoelectric composites, although it has obvious advantages of film product and highly tunable functions. Herein, we reported a novel preparation strategy, i.e. the combination of dynamic 3-phase interfacial electropolymerization for poly(3,4-ethylenedioxythiophene) (PEDOT) and the chemical doping of single-walled carbon nanotubes (SWCNTs), to fabricate flexible films of their thermoelectric composites. The acid-doped SWCNTs (a-SWCNTs) displayed a significantly enhanced electrical conductivity and a reduced Seebeck coefficient. The PEDOT/a-SWCNT composites exhibit excellent power factors with the maxima of 350.0 ± 47.6 μW m−1 K−2 at room temperature, and even as high as 510.2 μW m−1 K−2 at 412 K. More importantly, the thermoelectric performance can be conveniently tuned by various parameters, such as the a-SWCNT content, and electropolymerization conditions including the type and loading of the PEDOT counter ions. The present study proposes a new design strategy to fabricate high-performance polymer thermoelectric composites and facilitates the application of organic/inorganic thermoelectric composites.

Graphical abstract: PEDOT thermoelectric composites with excellent power factors prepared by 3-phase interfacial electropolymerization and carbon nanotube chemical doping

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Publication details

The article was received on 24 Mar 2019, accepted on 09 May 2019 and first published on 09 May 2019


Article type: Paper
DOI: 10.1039/C9TA03153G
J. Mater. Chem. A, 2019,7, 13687-13694

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    PEDOT thermoelectric composites with excellent power factors prepared by 3-phase interfacial electropolymerization and carbon nanotube chemical doping

    W. Fan, L. Liang, B. Zhang, C. Guo and G. Chen, J. Mater. Chem. A, 2019, 7, 13687
    DOI: 10.1039/C9TA03153G

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