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Engineered Molecular Chain Ordering in Single‐Walled Carbon Nanotubes/Polyaniline Composite Films for High‐Performance Organic Thermoelectric Materials
Author(s) -
Wang Liming,
Yao Qin,
Xiao Juanxiu,
Zeng Kaiyang,
Qu Sanyin,
Shi Wei,
Wang Qun,
Chen Lidong
Publication year - 2016
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201600212
Subject(s) - materials science , polyaniline , carbon nanotube , composite number , thermoelectric effect , seebeck coefficient , electrical resistivity and conductivity , composite material , polymerization , electrical conductor , conductive polymer , chemical engineering , nanotechnology , polymer , thermal conductivity , physics , electrical engineering , thermodynamics , engineering
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 1.44×10 3 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.