Li, Xin;
He, Zhenhang;
Liu, Zhen;
Chen, Yu;
Zhou, Zekun;
Chen, Guixiang;
Qi, Weiheng;
... Zhang, Peng; + view all
(2023)
High-performance post-treatment-free PEDOT based thermoelectric with the establishment of long-range ordered conductive paths.
Chemical Engineering Journal
, 454
(Part 1)
, Article 140047. 10.1016/j.cej.2022.140047.
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Abstract
In this work, post-treatment-free polymer hybrids, consisting of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) and ionic liquids (ILs), were fabricated for the thermoelectric (TE) application. By optimizing the ILs’ molar concentration (0–0.5 M) and chemical composition, that is varying the cyano-based anions coupled with 1-ethyl-3-methylimidazolium cations, a high TE performance (power factor of 190 μW m−1 K−2) was achieved. The excellent TE performance was attributed to the conductive network under the coupling effect of molecular structure (such as oxidation level, conformation and crystallization of PEDOT chains) and microstructure (long-range ordered conductive paths). Especially, the long-range conductive paths were proved to be made of rod-like microdomains, based on detailed structure analysis with micro-Fourier transform infrared spectroscopy and small-angle X-ray scattering. These paths enabled carrier transport among microdomains of PEDOT:PSS/IL hybrids. Moreover, the conductive network of PEDOT:PSS/IL hybrids showed good environmental and mechanical stability, enabling the fabrication of flexible TE generators.
| Type: | Article |
|---|---|
| Title: | High-performance post-treatment-free PEDOT based thermoelectric with the establishment of long-range ordered conductive paths |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2022.140047 |
| Publisher version: | https://doi.org/10.1016/j.cej.2022.140047 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | PEDOT:PSS, ionic liquid, thermoelectric, post-treatment-free, structureproperty correlation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10166267 |
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