Abstract
Electrical conductivity and seebeck coefficient at different temperatures, and thermal conductivity at room temperature for various doped polyaniline (PAn) samples were measured, and the thermoelectric figure of merit ZT was calculated. The effects of preparation methods and temperature on thermoelectric properties were discussed. The results show that the electrical conductivity and the seebeck coefficient of PAn are strongly dependent on the preparation conditions and temperature. The electrical conductivity becomes larger and the seebeck coefficient becomes smaller as PAn molecular weight increase. Redoping by organic acid and HCl results in an increase in both electrical conductivity and Seebeck coefficient of PAn, and therefore ZT value. The electrical conductivity increases and the seebeck coefficient decreases as the temperature increases when T<Td (dedoping temperature). The decreasing of the electrical conductivity and increasing of the seebeck coefficent take place by dedoping when T>Td. The thermal conductivity is lower, and insensitive to the sample preparation conditions.
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References
Terry M, Tritt. Thermoelectric Materials: Holey and Unholy Semiconductors.Science, 1999, 283:804
Mateeva N, Niculescu H. Correlation of Seebeck Coefficient and Electric Conductivity in Polyaniline.Journal of Applied Physics, 1998, 83(6):3111
Ikkala O T, Pietila L-O, Abjopalo L,et al. On the Molecular Recongnition and Association between Electrically Conducting Polyaniline and Solvent.J. Chem Phy, 1995, 103:9855
Geng Yanhou, Li Ji, Jing Xiabin,et al. The Molecular Weight Dependence of Charge Transport Properties of Polyaniline.Science in China (Series B) (in Chinese), 1998, 28(5):477
Cao Y, Smith P, Heeger A J. Counterion Induced Processibility of Conducting Polyaniline and Conducting Polyblends of Polyaniline in Bulk Polymer.Synth Met., 1992, 48(1):91
Wan M, Li W. Porous Polyaniline Films with High Conductivity.Synth. Met., 1998, 92:121
Yoon C O, Reghu M. Thermoelectric Power of Doped Polyaniline near the Metal-insulator Transition.Synth. Met., 1995, 69: 273
Kemp N T, Kaiser A B, Liu C J,et al. Thermoelectric Power and Conductivity of Different Types of Polypyrrole.Journal of Polymer Science, Part B: Polymer Physics, 1999, 37(9): 953
Zeng Xingrong, Gong Kecheng. The Structural Changes and Properties of Polyaniline Doped with Hydrochloride.Plastic Industry (in Chinese), 1989, 4:38
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LIU Jun: Born in 1963
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Jun, L., Lian-meng, Z., Li, H. et al. Synthesis and thermoelectric properties of polyaniline. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 18, 53–55 (2003). https://doi.org/10.1007/BF02838459
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DOI: https://doi.org/10.1007/BF02838459