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

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• 作者：Xijing Sun 孙希静 ; Yanhong Wei 魏燕红 ; Juanjuan Li 李娟娟…
• 关键词：PEDOT ; PSS ; thermoelectric ; carbon nanotube ; silver ; aerogel
• 刊名：Science China Materials
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：60
• 期：2
• 页码：159-166
• 全文大小：3662KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：60

文摘

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.