Preparation And Thermoelectric Properties Of PEDOT-Based Nanocomposite Materials

Thermoelectric (TE) material is one kind of energy materials which can directly convert electricity into heat and vice versa by transporting carriers, and can be used for and refrigeration power generation. Compared with ordinary inorganic materials, conducting polymers (CPs) TE materials have many advantages such as low thermal conductivity, abundant raw material, low cost and easy processing, etc. Among all the CPs, poly(3,4-ethyenedioxythiophene) (PEDOT)has been attracted more and more attention, due to its low thermal conductivity, high electrical conductivity by doping with suitable dopants. It is expected that the TE properties of the composites might be improved by taking virtue of the properties of Bi2Te3 or carbon material and PEDOT to potentially produce a synergistic effect, if a suitable method is used. Therefore,the purpose of this thesis is to preparation of Bi2Te3/PEDOT by different methods,and to preparation of conductive carbon black/PEDOT and graphene/PEDOT nanocomposite TE materials by in-situ polymerization method, as well as to investigate the effects of inorganic materials loadings on the phase composition, microstructure and TE properties of the as-prepared composites. Furthermore, the Bi2Te3/cotton fabric composites were prepared by a low temperature wet-chemical method. After that, the flexible PEDOT:PSS/Bi2Te3/cotton fabrics were prepared via PEDOT:PSS coating treatment. The effect of Bi2Te3 loadings on the TE properties of the composites was also investigated. The as-prepared composites have a great potential to be used for flexible TE devices.