Stretchable fabric generates electric power from woven thermoelectric fibers

Tingting Sun, Beiying Zhou, Qi Zheng, Lianjun Wang (), Wan Jiang () and Gerald Jeffrey Snyder ()
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Tingting Sun: College of Materials Science and Engineering, Donghua University
Beiying Zhou: College of Materials Science and Engineering, Donghua University
Qi Zheng: College of Materials Science and Engineering, Donghua University
Lianjun Wang: College of Materials Science and Engineering, Donghua University
Wan Jiang: College of Materials Science and Engineering, Donghua University
Gerald Jeffrey Snyder: Northwestern University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Assembling thermoelectric modules into fabric to harvest energy from body heat could one day power multitudinous wearable electronics. However, the invalid 2D architecture of fabric limits the application in thermoelectrics. Here, we make the valid thermoelectric fabric woven out of thermoelectric fibers producing an unobtrusive working thermoelectric module. Alternately doped carbon nanotube fibers wrapped with acrylic fibers are woven into π-type thermoelectric modules. Utilizing elasticity originating from interlocked thermoelectric modules, stretchable 3D thermoelectric generators without substrate can be made to enable sufficient alignment with the heat flow direction. The textile generator shows a peak power density of 70 mWm−2 for a temperature difference of 44 K and excellent stretchability (~80% strain) with no output degradation. The compatibility between body movement and sustained power supply is further displayed. The generators described here are true textiles, proving active thermoelectrics can be woven into various fabric architectures for sensing, energy harvesting, or thermal management.

Date: 2020
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DOI: 10.1038/s41467-020-14399-6

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