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Free-standing highly conducting PEDOT films for flexible thermoelectric generator

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  • Ni, Dan
  • Song, Haijun
  • Chen, Yuanxun
  • Cai, Kefeng

Abstract

Recently, organic thermoelectric (TE) materials especially conducting polymers have attracted increasing attention. In this work, we successfully synthesized ultrafine poly (3,4-ethylenedioxythiophene) (PEDOT) nanowires (NWs) (∼10 nm) by a simple self-assembled micellar soft-template method and then obtain highly flexible free-standing PEDOT NW films by vacuum-assisted filtration. The films are with very high electrical conductivity (∼1340 S cm−1). After being treated with 6 M H2SO4 and then with 1 M NaOH at room temperature, the film shows an enhanced power factor of 46.51 μW m−1K−2 (Seebeck coefficient of 25.5 μV K−1, electrical conductivity of 715.3 S cm−1), which increases by 54% compared with that of the pristine film. To the best of our knowledge, it outperforms the TE performance of all reported one dimensional conducting polymer-based films. In addition, the TE performance of the film almost remains unchanged even after being bent for 200 times, indicating excellent flexibility. A flexible TE prototype composed of six strips (7 mm × 30 mm) of the as-prepared PEDOT NW films connected in series shows an output power of 157.2 nW at a temperature difference of 51.6 K. The free-standing PEDOT NW films show promise to a new generation of wearable TE devices.

Suggested Citation

  • Ni, Dan & Song, Haijun & Chen, Yuanxun & Cai, Kefeng, 2019. "Free-standing highly conducting PEDOT films for flexible thermoelectric generator," Energy, Elsevier, vol. 170(C), pages 53-61.
    • Handle: RePEc:eee:energy:v:170:y:2019:i:c:p:53-61
    DOI: 10.1016/j.energy.2018.12.124
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    References listed on IDEAS

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    Cited by:

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    2. Lv, Jin-Ran & Ma, Jin-Lei & Dai, Lu & Yin, Tao & He, Zhi-Zhu, 2022. "A high-performance wearable thermoelectric generator with comprehensive optimization of thermal resistance and voltage boosting conversion," Applied Energy, Elsevier, vol. 312(C).
    3. Abdelkader Rjafallah & Daniel Tudor Cotfas & Petru Adrian Cotfas, 2022. "Legs Geometry Influence on the Performance of the Thermoelectric Module," Sustainability, MDPI, vol. 14(23), pages 1-22, November.
    4. Cui, Y.J. & Wang, B.L. & Wang, K.F., 2021. "Energy conversion performance optimization and strength evaluation of a wearable thermoelectric generator made of a thermoelectric layer on a flexible substrate," Energy, Elsevier, vol. 229(C).
    5. Bharti, Meetu & Jha, P. & Singh, Ajay & Chauhan, A.K. & Misra, Shantanu & Yamazoe, Masato & Debnath, A.K. & Marumoto, Kazuhiro & Muthe, K.P. & Aswal, D.K., 2019. "Scalable free-standing polypyrrole films for wrist-band type flexible thermoelectric power generator," Energy, Elsevier, vol. 176(C), pages 853-860.

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