Flexible PANI/SWCNT thermoelectric films with ultrahigh electrical conductivity of ~4000 S cm−1. The maximum PF reaches 100 μW m−1 K−2 at 410 K for the 0.6CNT/PANI.
Recently, aerogels have been considered as hopeful thermoelectric (TE) materials because of their unique ultralow thermal conductivity compared to conventional bulk/film materials. However, their electrical conductivity cannot meet the requirement of good TE materials due to their highly porous feature. Herein, we composited poly(3,4theylenedioxythiophene) (PEDOT) with SWCNT and bacterial cellulose (BC) to synthesize nanoporous PEDOT/ SWCNT/BC films that can achieve high electrical and low thermal conductivity simultaneously by post-processing of their hybrid aerogels. A relatively high electrical conductivity of 290.6 S/cm and a low thermal conductivity of 0.13 W m −1 K −1 have been achieved for free-standing PEDOT/SWCNT/BC-32% film at room temperature. Furthermore, the films show an outstanding flexibility and fracture strength of 1.6 MPa and an elongation at break of 2.13%. The unique advantages of excellent flexibility and high electrical conductivity as well as low thermal conductivity make PEDOT/SWCNT/BC films have broad prospects in wearable thermoelectric applications.
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