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Robust PEDOT:PSS Wet‐Spun Fibers for Thermoelectric Textiles
Author(s) -
Kim Youngseok,
Lund Anja,
Noh Hyebin,
Hofmann Anna I.,
Craighero Mariavittoria,
Darabi Sozan,
Zokaei Sepideh,
Park Jae Il,
Yoon MyungHan,
Müller Christian
Publication year - 2020
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201900749
Subject(s) - materials science , thermoelectric effect , composite material , pedot:pss , ultimate tensile strength , seebeck coefficient , thermoelectric materials , crystallinity , polymer , thermal conductivity , physics , thermodynamics
To realize thermoelectric textiles that can convert body heat to electricity, fibers with excellent mechanical and thermoelectric properties are needed. Although poly(3,4‐ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is among the most promising organic thermoelectric materials, reports that explore its use for thermoelectric fibers are all but absent. Herein, the mechanical and thermoelectric properties of wet‐spun PEDOT:PSS fibers are reported, and their use in energy‐harvesting textiles is discussed. Wet‐spinning into sulfuric acid results in water‐stable semicrystalline fibers with a Young's modulus of up to 1.9 GPa, an electrical conductivity of 830 S cm −1 , and a thermoelectric power factor of 30 μV m −1 K −2 . Stretching beyond the yield point as well as repeated tensile deformation and bending leave the electrical properties of these fibers almost unaffected. The mechanical robustness/durability and excellent underwater stability of semicrystalline PEDOT:PSS fibers, combined with a promising thermoelectric performance, opens up their use in practical energy‐harvesting textiles, as illustrated by an embroidered thermoelectric fabric module.