Direct Wet-Spun Single-Walled Carbon Nanotubes-Based p–n Segmented Filaments toward Wearable Thermoelectric Textiles

• DOI: 10.1021/acsami.2c12798
• Publication Date: 2022-09-23T11:47:40Z
• Authors: Xiaona Yang; Kun Zhang
• Keywords: Wearable Technology

Three-dimensional thermoelectric (TE) textiles (TETs) fabricated with TE filaments (TEFs) possess merits over other types such as thickness–direction thermal energy harvesting and excellent conformability dynamic body curves, revealing the prospect of generating electricity for on-body application. Nonetheless, there is still a lack costless but scalable method to automatically seamlessly produce in-series interconnected p–n segmented TEFs high properties via conventional fiber spinning processes. Here, we developed an alternate wet-spinning strategy continuously manufacture single-walled carbon nanotube-based at large scale. The TEF electrical conductivity (400–800 S cm–1) displays low contact resistivity 189.8 μΩ cm2 between segments interelectrode, showing 2 orders magnitude smaller than that reported in literature. More importantly, power factors p-type n-type are 26.25 17.14 μW m–1 K–2, respectively, which 3 4 higher those advanced studies. We finally embroidered it into spacer fabric fabricate wearable TET, demonstrating output density 501 nW m–2 ΔT = 27.7 K. methodology can inspire development fiber-based electronics TEs diodes so forth.