Kim Nara, Lienemann Samuel, Petsagkourakis Ioannis, Alemu Mengistie Desalegn, Kee Seyoung, Ederth Thomas, Gueskine Viktor, Leclère Philippe, Lazzaroni Roberto, Crispin Xavier, Tybrandt Klas
Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden.
Materials Engineering Department, California Polytechnic State University, 1 Grand Ave, San Luis Obispo, CA, 93407, USA.
Nat Commun. 2020 Mar 18;11(1):1424. doi: 10.1038/s41467-020-15135-w.
The rapid growth of wearables has created a demand for lightweight, elastic and conformal energy harvesting and storage devices. The conducting polymer poly(3,4-ethylenedioxythiophene) has shown great promise for thermoelectric generators, however, the thick layers of pristine poly(3,4-ethylenedioxythiophene) required for effective energy harvesting are too hard and brittle for seamless integration into wearables. Poly(3,4-ethylenedioxythiophene)-elastomer composites have been developed to improve its mechanical properties, although so far without simultaneously achieving softness, high electrical conductivity, and stretchability. Here we report an aqueously processed poly(3,4-ethylenedioxythiophene)-polyurethane-ionic liquid composite, which combines high conductivity (>140 S cm) with superior stretchability (>600%), elasticity, and low Young's modulus (<7 MPa). The outstanding performance of this organic nanocomposite is the result of favorable percolation networks on the nano- and micro-scale and the plasticizing effect of the ionic liquid. The elastic thermoelectric material is implemented in the first reported intrinsically stretchable organic thermoelectric module.
可穿戴设备的迅速发展催生了对轻质、弹性且贴合身体的能量收集与存储设备的需求。导电聚合物聚（3,4 - 亚乙基二氧噻吩）在热电发电机方面展现出巨大潜力，然而，有效收集能量所需的厚层原始聚（3,4 - 亚乙基二氧噻吩）过于坚硬且易碎，无法无缝集成到可穿戴设备中。聚（3,4 - 亚乙基二氧噻吩）-弹性体复合材料已被开发用于改善其机械性能，尽管到目前为止尚未同时实现柔软性、高电导率和可拉伸性。在此，我们报道一种水相处理的聚（3,4 - 亚乙基二氧噻吩）-聚氨酯 - 离子液体复合材料，它兼具高电导率（>140 S cm）、卓越的可拉伸性（>600%）、弹性以及低杨氏模量（<7 MPa）。这种有机纳米复合材料的出色性能源于纳米和微观尺度上有利的渗流网络以及离子液体的增塑作用。这种弹性热电材料被应用于首个报道的本征可拉伸有机热电模块中。
