Thermoelectric fibers from well-dispersed carbon nanotube/poly(vinyliedene fluoride) pastes for fiber-based thermoelectric generators

Abstract

The organic thermoelectric fibers with p- and n-type power factors of 378 ± 56 and 289 ± 98 μW m−1 K−2, respectively, were prepared via simple wet-spinning and post-treatment methods.

A Self-Powered Flexible Thermoelectric Sensor and Its Application on the Basis of the Hollow PEDOT:PSS Fiber

“…Analysis of the high-resolution SEM image of the PEDOT:PSS fiber surface shows that the diameters of the prepared fiber domains are distributed from several micrometers, which are much larger than those of the reported PEDOT:PSS thin film [36]. The highly conductive PEDOT-rich regions interconnect to form carrier transport paths known as percolation paths [14,32,37]. The charge flowing through the PEDOT:PSS fiber must cross the insulating PSS-rich domain boundaries via hopping.…”

“…As an organic-based TE material, PEDOT:PSS is suitable for the preparation of thin-film or fiber devices through chemical modification and complex materials [12,13]. The Seebeck value of the PEDOT:PSS film is reported to be 19.4 µV/K [14]. A recent study [15] shows that a remarkable increase of a Seebeck value can be reached of -18.2 mV/K by using a copper (II) chloride (CuCl 2 ) doping.…”

“…Recently, a reported~15 micron PEDOT:PSS fiber [17] possessed higher flexibility with an electrical conductivity of 3828 S/cm, which is compatible with the value of an ultra-thin PEDOT:PSS film. Different kinds of TE fibers have emerged, and considerable attention has been given to SWCNT/PVDF composite fibers [14,16], , and glass-semiconductor fibers [21] for applications in energy harvesting, thermal sensing, and positioning. With years of development, major achievements have been obtained for flexible sensors towards promising applications in personal health [22,23], artificial intelligence systems [24][25][26], wearable motion detection [27,28], and wearable healthcare devices [29].…”

Recent advances, design guidelines, and prospects of flexible organic/inorganic thermoelectric composites

“…10). 135 In the past decade, the thermoelectric properties of only a few organic small molecule (OSM) materials have been studied in detail, such as porphyrin, 136 bis-(ethylenedithio)tetrathiafulvalene (BEDT-TTF), 137…”

High cross‐plane thermoelectric performance of carbon nanotube sponge films

“…[10][11][12][13][14] Thanks to the flexible mechanical strength and lightweight, the CNT-based composites have been widely explored as TE materials [15][16][17] and also other materials, such as electric heating materials 18,19 and sensing elements. 20,21 Compared with traditional TE materials based on bismuth and tellurium, CNT-based composites advanced in flexible, [22][23][24][25] while the output electric power is still too low. The CNT-based composites only have a ZT of about 10 −5 to 10 −6 magnitude.…”