Thermoelectric performance of electrodeposited nanostructured polyaniline doped with sulfo‐salicylic acid

Abstract

Conducting polymers, in present days, are considered to be potential thermoelectric (TE) materials. Among them polyaniline (PANI) is a promising candidate. Nanostructured polyaniline doped with organic dopant is electrodeposited and structurally characterized. Its transport properties are investigated for thermoelectric applications. The analysis of transmission electron microscopy image reveals that the sample is rod like nanostructure. This study shows that the type (inorganic/organic) of dopants plays an important role to influence the dimension of nanostructure and the electrical transport properties of PANI. In this study, organic dopant sulfosalicylic acid is proposed for enhancement of figure of merit through an increase in thermoelectric power and decrease in thermal conductivity. Compared to our earlier work the figure of merit evaluated is two orders higher than that of the inorganic dopant bismuth nitrate doped PANI.

Preparation and thermoelectric properties of diphenylaminobenzylidene-substituted poly(3-methylthiophene methine)/graphite composite

“…29 Increasing the carrier concentration generally increases the electrical conductivity and decreases the Seebeck coefficient, whereas a higher Seebeck coefficient can be obtained by increasing the carrier mobility. 10,30,31 Thus, we hypothesize that the carrier mobility has a greater effect on the Seebeck coefficient than the carrier concentration, resulting in Ac PMTDPABQ having a higher Seebeck coefficient than Am PMTDPABQ, which could be indirectly conrmed by the data shown in Table 1. Pure polymer samples, which possessed a high resistance beyond the measuring range of the test equipment, were not examined.…”

Composite of polyaniline‐bismuth selenide with enhanced thermoelectric performance

“…In this paradigm, there has been an increased impetus on organic conducting polymers as an assuring alternative to inorganic TE materials. Conducting polymers‐like polyaniline (PANI), polyhexathiophene (PEDOT), polypyrrole,and so on have unique features like intrinsically low thermal conductivity, abundantly available materials (low cost), nominal density, lightweight, and relatively easy synthesis process addition of carbon nanofillers (e.g., CNTs, graphene, etc.…”

“…), using high‐TE‐performance inorganic semiconductors, metal coordination polymers, polymer blends, etc. Recently, the conducting polymer, highly doped polyaniline (PANI), has been thoroughly studied as a promising organic TE material Te, SWNT/Te, CNT/Ag, and chalcogenides, for example, PbTe, silver telluride (Ag 2 Te), zinc selenide (ZnSe), Bi 2 Te 3, bismuth antimony telluride (Bi 0.5 Sb 1.5 Te 3 ), cadmium sulfide (CdS), etc.…”

Reduced graphene oxide-polyaniline composites—synthesis, characterization and optimization for thermoelectric applications

“…[16][17][18][19] However, there are problems of toxicity, production cost and processing. With the advent of conducting polymers, a new class of potential thermoelectric materials [20][21][22][23][24] have emerged due to their low cost, ease of synthesis and environmentally friendly nature. Carrier transport in conducting polymers occurs by interchain and intrachain hopping processes according to the variable range hopping model.…”

“…Furthermore, its conductivity can be tuned by doping with different types of dopants-inorganic and organic. 20,22 Available reports show that thermoelectric properties are improved more for composites with polymer and rGO 13,14 as compared to graphite or GO. In this work, we have prepared rGO by oxidation and subsequent reduction of graphite powder.…”