Engineered Molecular Chain Ordering in Single-Walled Carbon Nanotubes/Polyaniline Composite Films for High-Performance Organic Thermoelectric Materials

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• 作者：Dr. Liming Wang ; Dr. Qin Yao ; Dr. Juanxiu Xiao ; Prof. Kaiyang Zeng ; Dr. Sanyin Qu ; Wei Shi ; Dr. Qun Wang and Prof. Lidong Chen
• 刊名：Chemistry – An Asian Journal
• 出版年：2016
• 出版时间：June 21, 2016
• 年：2016
• 卷：11
• 期：12
• 页码：1804-1810
• 全文大小：1756K
• ISSN：1861-471X

文摘

Single-walled carbon nanotubes (SWNTs)/polyaniline (PANI) composite films with enhanced thermoelectric properties were prepared by combining in situ polymerization and solution processing. Conductive atomic force microscopy and X-ray diffraction measurements confirmed that solution processing and strong π–π interactions between the PANI and SWNTs induced the PANI molecules to form a highly ordered structure. The improved degree of order of the PANI molecular arrangement increased the carrier mobility and thereby enhanced the electrical transport properties of PANI. The maximum in-plane electrical conductivity and power factor of the SWNTs/PANI composite films reached 1.44×10³ S cm⁻¹ and 217 μW m⁻¹ K⁻², respectively, at room temperature. Furthermore, a thermoelectric generator fabricated with the SWNTs/PANI composite films showed good electric generation ability and stability. A high power density of 10.4 μW cm⁻² K⁻¹ was obtained, which is superior to most reported results obtained in organic thermoelectric modules.