低 CNT 含量的 CNT/P3HT 复合材料的增强热电性能†,RSC Advances

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低 CNT 含量的 CNT/P3HT 复合材料的增强热电性能†
RSC Advances ( IF 3.9 ) Pub Date : 2018-10-02 00:00:00 , DOI: 10.1039/c8ra07297c
Sanyin Qu ₁ , Mengdi Wang _{1,

2} , Yanling Chen _{1,

2} , Qin Yao ₁ , Lidong Chen _{1,

3}

Affiliation

碳纳米管（CNTs）由于其独特的结构和优异的电子传输性能，已成为改善有机材料热电性能的主要添加剂之一。然而，由于生长的碳纳米管通常具有不同的直径，因此确定碳纳米管的直径对碳纳米管/聚（3-己基噻吩）（P3HT）复合薄膜的热电性能的影响具有重要意义。在此，我们制备了直径为<8 nm、8-15 nm、20-30 nm、30-50 nm和>50 nm的CNT/P3HT复合薄膜，并研究了它们的热电性能。发现碳纳米管的直径对复合薄膜的热电性能有重要影响。P3HT- d _CNT (<8 nm) 和 P3HT- d _CNT（8-15 nm）复合薄膜表现出几乎相同的热电性能，几乎是其他三种复合薄膜的两倍多，CNT直径增加。还研究了 CNT/P3HT 复合薄膜的不同质量分数。在质量分数为95 wt% P3HT，即5 wt% CNTs时，CNT ( d < 8 nm)/P3HT复合薄膜的最大TE功率因数达到49.0 μW mK ^{-2 。}CNT ( d < 8 nm)/P3HT 复合薄膜的这种优异的 TE 功率因数可归因于 P3HT 聚合物的完全连接的中间层以及短长度 CNT 的异质分散。

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Enhanced thermoelectric performance of CNT/P3HT composites with low CNT content†

Carbon nanotubes (CNTs) have emerged as one of the leading additives for improving the thermoelectric properties of organic materials due to their unique structure and excellent electronic transport properties. However, since as-grown CNTs generally possess different diameters, it is of high interest to determine the influence of the diameter of carbon nanotubes on the thermoelectric properties of CNT/poly(3-hexylthiophene) (P3HT) composite films. Herein, we prepared CNT/P3HT composite films with diameters of <8 nm, 8–15 nm, 20–30 nm, 30–50 nm and >50 nm and studied their thermoelectric properties. It was found that the diameter of CNTs had an important influence on the TE performance of the composite films. The P3HT-d_CNT (<8 nm) and P3HT-d_CNT (8–15 nm) composite films exhibited almost the same thermoelectric performance and almost more than double that of the other three composite films with increased CNT diameter. The different mass fractions of CNT/P3HT composite films have also been investigated. The maximum TE power factor of CNT (d < 8 nm)/P3HT composite films reached 49.0 μW mK⁻² at the mass fraction of 95 wt% P3HT, that is, 5 wt% CNTs. This superior TE power factor of CNT (d < 8 nm)/P3HT composite films can be ascribed to the fully connected interlayer of the P3HT polymer and also the heterogeneous dispersion of short-length CNTs.

更新日期：2018-10-02

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