中国物理B ›› 2022, Vol. 31 ›› Issue (2): 27303-027303.doi: 10.1088/1674-1056/ac3502

所属专题： SPECIAL TOPIC — Organic and hybrid thermoelectrics

• • 上一篇    下一篇

Facile fabrication of highly flexible, porous PEDOT: PSS/SWCNTs films for thermoelectric applications

Fu-Wei Liu(刘福伟)1,†, Fei Zhong(钟飞)2,†, Shi-Chao Wang(王世超)2, Wen-He Xie(谢文合)1, Xue Chen(陈雪)1, Ya-Ge Hu(胡亚歌)1, Yu-Ying Ge(葛钰莹)1, Yuan Gao(郜源)1, Lei Wang(王雷)2,‡, and Zi-Qi Liang(梁子骐)3,§   

  1. 1 College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China;
    2 Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China;
    3 Department of Materials Science, Fudan University, Shanghai 200433, China
  • 收稿日期:2021-08-31 修回日期:2021-10-14 接受日期:2021-11-01 出版日期:2022-01-13 发布日期:2022-01-22
  • 通讯作者: Lei Wang, Zi-Qi Liang E-mail:wl@szu.edu.cn;zqliang@fudan.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U2004174, 51773118, and 51673044).

Facile fabrication of highly flexible, porous PEDOT: PSS/SWCNTs films for thermoelectric applications

Fu-Wei Liu(刘福伟)1,†, Fei Zhong(钟飞)2,†, Shi-Chao Wang(王世超)2, Wen-He Xie(谢文合)1, Xue Chen(陈雪)1, Ya-Ge Hu(胡亚歌)1, Yu-Ying Ge(葛钰莹)1, Yuan Gao(郜源)1, Lei Wang(王雷)2,‡, and Zi-Qi Liang(梁子骐)3,§   

  1. 1 College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang 464000, China;
    2 Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China;
    3 Department of Materials Science, Fudan University, Shanghai 200433, China
  • Received:2021-08-31 Revised:2021-10-14 Accepted:2021-11-01 Online:2022-01-13 Published:2022-01-22
  • Contact: Lei Wang, Zi-Qi Liang E-mail:wl@szu.edu.cn;zqliang@fudan.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. U2004174, 51773118, and 51673044).

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摘要： High-performance organic composite thermoelectric (TE) materials are considered as a promising alternative for harvesting heat energy. Herein, composite films of poly (3,4-ethyienedioxythiophene):poly(styrene sulfonate)/single-walled carbon nanotubes (PEDOT:PSS/SWCNTs) were fabricated by utilizing a convenient solution mixing method. Thereafter, the as-prepared hybrid films were treated using sulfuric acid (H2SO4) to further optimize the TE performance. Film morphological studies revealed that the sulfuric acid treated PEDOT:PSS/SWCNTs composite samples all possessed porous structures. Due to the successful fabrication of highly conductive networks, the porous nano-architecture also exhibited much more excellent TE properties when compared with the dense structure of the pristine samples. For the post-treated sample, a high power factor of 156.43 μW· m-1· K-2 can be achieved by adjusting the content of CNTs, which is approximately 3 orders of magnitude higher than that of the corresponding untreated samples (0.23 μW· m-1· K-2). Besides, the obtained films also showed excellent mechanical flexibility, owing to the porous nanostructure and the strong π-π interactions between the two components. This work indicates that the H2SO4 treatment could be a promising strategy for fabricating highly-flexible and porous PEDOT:PSS/SWCNTs films with high TE performances.

关键词: porous film, thermoelectric properties, flexibility

Abstract: High-performance organic composite thermoelectric (TE) materials are considered as a promising alternative for harvesting heat energy. Herein, composite films of poly (3,4-ethyienedioxythiophene):poly(styrene sulfonate)/single-walled carbon nanotubes (PEDOT:PSS/SWCNTs) were fabricated by utilizing a convenient solution mixing method. Thereafter, the as-prepared hybrid films were treated using sulfuric acid (H2SO4) to further optimize the TE performance. Film morphological studies revealed that the sulfuric acid treated PEDOT:PSS/SWCNTs composite samples all possessed porous structures. Due to the successful fabrication of highly conductive networks, the porous nano-architecture also exhibited much more excellent TE properties when compared with the dense structure of the pristine samples. For the post-treated sample, a high power factor of 156.43 μW· m-1· K-2 can be achieved by adjusting the content of CNTs, which is approximately 3 orders of magnitude higher than that of the corresponding untreated samples (0.23 μW· m-1· K-2). Besides, the obtained films also showed excellent mechanical flexibility, owing to the porous nanostructure and the strong π-π interactions between the two components. This work indicates that the H2SO4 treatment could be a promising strategy for fabricating highly-flexible and porous PEDOT:PSS/SWCNTs films with high TE performances.

Key words: porous film, thermoelectric properties, flexibility

中图分类号:  (Thermoelectric effects)

  • 73.50.Lw
88.30.rh (Carbon nanotubes) 78.67.Rb (Nanoporous materials)