塞贝克系数
材料科学
佩多:嘘
纳米复合材料
热电效应
电阻率和电导率
导电聚合物
热电材料
复合材料
热导率
功率因数
聚合物
电压
电气工程
热力学
工程类
物理
作者
Siqi Liu,Hui Li,Chaobin He
出处
期刊:Carbon
[Elsevier]
日期:2019-04-13
卷期号:149: 25-32
被引量:111
标识
DOI:10.1016/j.carbon.2019.04.007
摘要
High electrical conductivity and high Seebeck coefficient are the two important prerequisites for achieving high power factor in organic thermoelectric (TE) materials. However, these two properties are quite often in conflict. In this work, we demonstrate that incorporating CNT in a conducting polymer PEDOT:PSS could facilitate the formation of stable and effective conductive channels, which provides an effective approach to optimize the TE parameters with simultaneously enhanced electrical conductivity and Seebeck coefficient against the initial organic TE materials. With further tailoring charge concentration of the SWNT/PEDOT:PSS composite by base treatment, the TE performance could be improved. Nanocomposite of 60 wt% SWNT and PEDOT:PSS exhibits high TE power factor of ∼526 μW m−1 K−2 with Seebeck coefficient of 55.6 μV K−1 and electrical conductivity of 1701 S cm−1, which is by far one of the highest power factors among the reported organic TE nanocomposites. Considering thermal conductivity around 0.4–0.6 W/m K, the highest estimated ZT value of our TE nanocomposite can approach 0.39, demonstrating the feasibility of this strategy to enhance TE performance of organic composite materials.
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