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A PEDOT:PSS thermoelectric fiber generator
Nano Energy ( IF 17.6 ) Pub Date : 2022-08-05 , DOI: 10.1016/j.nanoen.2022.107678
Li Liu, Jun Chen, Lirong Liang, Liang Deng, Guangming Chen

Organic thermoelectric (TE) fibers, that combine the impressive structural features and high heat-to-electricity conversion capability, have made great achievements in recent years, while convenient and efficient preparation of flexible polymer fibers remains a great challenge. Herein, flexible poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) fibers are efficiently produced through a convenient freeze-thaw (FT) induced gelation and subsequent high speed wet-spinning process. The spinnability and TE properties of the resultant PEDOT:PSS spinning dopes are obviously improved by regulating the FT cycles, the extrusion velocity, the length/diameter ratio of the needle, as well as the type of coagulation bath. Accordingly, the optimized PEDOT:PSS fiber obtained at a pretty high extrusion speed (150 mm min−1 or 1037 mL h−1) exhibits a considerably high electrical conductivity of 1013 ± 32 S cm−1, which outperforms most wet-spinning PEDOT:PSS fibers reported so far, and also displays excellent mechanically-stable TE properties upon large mechanical bending or twisting deformation. Based on the PEDOT:PSS fibers, a simple and flexible TE generator is further assembled, which can generate stable output performance by harvesting human body heat or low temperature of ice cube, indicating its good adaptability to various scenarios. This work provides a novel, convenient, and effective approach to develop the PEDOT:PSS fibers and versatile fiber-based TE devices.



中文翻译:

A PEDOT:PSS 热电纤维发生器

有机热电(TE)纤维结合了令人印象深刻的结构特征和高热电转换能力,近年来取得了巨大成就,而柔性聚合物纤维的便捷高效制备仍然是一个巨大的挑战。在此,柔性聚(3,4-乙烯二氧噻吩):聚(苯乙烯磺酸盐)(PEDOT:PSS)纤维通过方便的冻融(FT)诱导凝胶化和随后的高速湿纺工艺高效生产。通过调节 FT 循环、挤出速度、针的长径比以及凝固浴的类型,得到的 PEDOT:PSS 纺丝原液的可纺性和 TE 性能明显提高。因此,优化的 PEDOT:PSS 纤维以相当高的挤出速度(150 mm min -1或 1037 mL h -1 )表现出 1013 ± 32 S cm -1的相当高的电导率,优于迄今为止报道的大多数湿纺 PEDOT:PSS 纤维,并且在大机械弯曲或扭曲变形。在PEDOT:PSS纤维的基础上,进一步组装了简单灵活的TE发生器,可通过采集人体热量或冰块低温产生稳定的输出性能,对各种场景具有良好的适应性。这项工作为开发 PEDOT:PSS 光纤和基于光纤的多功能 TE 器件提供了一种新颖、方便且有效的方法。

更新日期:2022-08-10
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