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Lund, Anja; Tian, Yuan; Darabi, Sozan; Müller, Christian
Journal of power sources, 12/2020, Volume: 480Journal Article
Conducting polymers offer new opportunities to design soft, conformable and light-weight thermoelectric textile generators that can be unobtrusively integrated into garments or upholstery. Using the widely available conducting polymer:polyelectrolyte complex poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) as the p-type material, we have prepared an electrically conducting sewing thread, which we then embroidered into thick wool fabrics to form out-of-plane thermoelectric textile generators. The influence of device design is discussed in detail, and we show that the performance of e-textile devices can be accurately predicted and optimized using modeling developed for conventional thermoelectric systems, provided that the electrical and thermal contact resistances are included in the model. Finally, we demonstrate a thermoelectric textile device that can generate a, for polymer-based devices, unprecedented power of 1.2 μW at a temperature gradient ΔT of 65 K, and over 0.2 μW at a more modest ΔT of 30 K. Display omitted •E-textiles offer wearable sensing and energy harvesting functionality.•Thermoelectric energy harvesters can convert body heat to electricity.•Our thermoelectric textile delivers a record 1.2 μW at ΔT = 65 K.•Adapted thermoelectric models accurately predict the textile device performance.
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