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Ultralight conducting PEDOT:PSS/carbon nanotube aerogels doped with silver for thermoelectric materials

银掺杂PEDOT: PSS/碳纳米管超轻导电气凝胶热电材料

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Abstract

A significant enhancement in the thermoelectric performance was observed for three-dimensional conducting aerogels, which were obtained from poly(3,4-ethylenedioxythiophene): poly(4-styrenesulfonic) (PEDOT:PSS) and multiwalled carbon nanotubes (MWCNTs) suspensions by adding different concentrations of metallic silver (Ag). It was found that the electrical conductivity and Seebeck coefficient could be simultaneously increased with the unique structure. Moreover, the conducting aerogels have an ultralow thermal conductivity (0.06 W m−1 K−1) and a large Brunauer-Emmett-Teller surface area (228 m2 g−1). The highest figure of merit (zT) value in this study was 7.56×10−3 at room temperature upon the addition of 33.32 wt.% Ag. Although the zT value was too low, our work may provide new insights into the design and development of the thermoelectric material for applications. Further investigation with PEDOT:PSS aerogels will be continued to get an economical, lightweight, and efficient polymer thermoelectric material.

摘要

本文以导电高分子PEDOT:PSS、多壁碳纳米管(MWCNTs)、银纳米片(Ag)为原料制备了导电复合气凝胶. 研究发现, 该材料具有特 殊的3D网络结构, 并且该结构的存在有利于复合材料电导率和Seebeck系数同时提高, 而热导率保持较低水平. 室温下复合材料热导率低至 0.06 Wm−1 k−1, 比表面积高达228 m2 g−1. 当Ag含量为33.32%时, 该气凝胶热电材料室温下zT值最高为7.56×10−3. 虽然该zT值仍较低, 尚不能 用于实际生产, 但本研究为热电材料的设计和开发利用提供了新的设计方法. 下一步工作将立足于PEDOT:PSS气凝胶制备经济、轻质、高 效的聚合物热电材料.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (51303116).

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Correspondence to Lijuan Zhao  (赵丽娟) or Quan Li  (李权).

Additional information

Xijng Sun is a master student of the College of Chemistry and Materials Science, Sichuan Normal University. She joined Prof. Lijuan Zhao’s group in 2014 and her current research interests include the preparation and properties of thermoelectric materials.

Lijuan Zhao is a professor of chemistry at the College of Chemistry and Materials Science, Sichuan Normal University. She received his PhD degree in materials science from Sichuan University in 2009, followed by a period of postdoctoral research at Xinjiang Blue Ridge Tunhe Chemical Industry Joint Stock Co, Ltd. Her research interests include the structure performance study of functional materials; synthesis, characterization, and self-assembly of nanomaterials.

Quan Li is a professor of chemistry at the College of Chemistry and Materials Science, Sichuan Normal University. He received his PhD degree in atomic and molecular physics from Sichuan University in 2001. His research interests include the preparation and application study of materials.

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Sun, X., Wei, Y., Li, J. et al. Ultralight conducting PEDOT:PSS/carbon nanotube aerogels doped with silver for thermoelectric materials. Sci. China Mater. 60, 159–166 (2017). https://doi.org/10.1007/s40843-016-5132-8

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  • DOI: https://doi.org/10.1007/s40843-016-5132-8

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