Herein, we report a Ag₂Se/Ag/PEDOT (poly (3,4-ethylenedioxythiophene) composite film with a high thermoelectric performance and superior flexibility. First, we used PEDOT: poly (styrenesulfonate) (PSS) coated Se nanowires (NWs) as templates to prepare PEDOT:PSS coated Ag₂Se/Ag composite powders, then Ag₂Se/Ag/PEDOT composite films supported on porous nylon membrane were fabricated by vacuum assisted filtration and then hot pressing. An optimum composite film exhibits a high power factor of ∼1442.5 μW m⁻¹ K⁻², ultrahigh electrical conductivity (σ) of ∼5957.3 S cm⁻¹ and superior flexibility (only 5.5% decrease in σ after 1000 times bending around a 4 mm radius rod) at RT. A certain amount of Ag phase in the composite film leads to an ultrahigh σ, while the PEDOT located at the interface between Ag and Ag₂Se grains and at the surface of the Ag₂Se grains causes the composite film with a low thermal conductivity. The excellent flexibility is due to the synergistic effect of the nylon membrane and PEDOT. Moreover, a 4-leg flexible thermoelectric power generator (f-TEG) assembled with the composite film shows a low internal resistance of ∼8 Ω, which makes it very possible to be integrated with a DC/DC converter for continually outputting power. The f-TEG produces a voltage of 5.6 mV and a maximum power of 1.8 μW (power density of 7.47 W m⁻²) at a temperature gradient of 27 K. This work provides an effective avenue for preparing high-performance flexible thermoelectric film with ultrahigh electrical conductivity.

在此，我们报告了一种具有高热电性能和优异柔韧性的 Ag ₂ Se/Ag/PEDOT（聚（3,4-亚乙基二氧噻吩）复合膜。首先，我们使用 PEDOT：聚（苯乙烯磺酸盐）（PSS）涂覆的硒纳米线（NWs） ) 作为模板制备 PEDOT:PSS 包覆的 Ag ₂ Se/Ag 复合粉末，然后通过真空辅助过滤和热压制备负载在多孔尼龙膜上的Ag ₂ Se/Ag/PEDOT 复合膜。 ∼1442.5 μW m ^-1  K ^{-2 的}功率因数、∼5957.3 S cm ^{-1 的}超高电导率 ( σ )和卓越的柔韧性（σ仅降低 5.5%在室温下围绕半径为 4 mm 的杆弯曲 1000 次后）。将一定量的在复合膜导致超高Ag相的σ，而位于的Ag和Ag之间的界面处的PEDOT ₂硒颗粒和在Ag的表面₂硒晶粒导致具有低导热性的复合膜。出色的柔韧性是由于尼龙膜和 PEDOT 的协同作用。此外，与复合膜组装在一起的 4 腿柔性热电发电机 (f-TEG) 显示出~8 Ω 的低内阻，这使得与 DC/DC 转换器集成以连续输出功率成为可能。f-TEG 产生的电压为 5.6 mV，最大功率为 1.8 μW（功率密度为 7.47 W m ^-2) 在 27 K 的温度梯度下。这项工作为制备具有超高电导率的高性能柔性热电薄膜提供了有效途径。