Ultrahigh performance PEDOT/Ag2Se/CuAgSe composite film for wearable thermoelectric power generators
Ultrahigh performance PEDOT/Ag2Se/CuAgSe composite film for wearable thermoelectric power generators
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用于可穿戴热电发电机的超高性能PEDOT/Ag2Se/CuAgSe复合薄膜
DOI：
10.1016/j.mtphys.2020.100223
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发表时间：
2020-08-01
影响因子：
11.5
通讯作者：
He, J.
中科院分区：
文献类型：
--
作者：
Lu, Y.;Qiu, Y.;He, J.
近十年来，人们对有机/无机复合材料的热电性能进行了广泛的研究，但仍未取得重大突破。在此，我们开发了一种简单的方法来制备具有超高性能和优越柔韧性的聚（3,4-乙烯二氧噻吩）(PEDOT)/Ag2Se/CuAgSe三元复合薄膜。首先原位化学合成PEDOT：聚苯乙烯磺酸盐（PSS）包覆Se （PC-Se）纳米线（NWs），然后以PC-Se纳米线为模板制备PEDOT:PSS包覆Ag2Se/CuAgSe纳米线，最后通过真空辅助过滤-热压法制备多孔尼龙膜上的高柔性PEDOT/Ag2Se/CuAgSe复合薄膜。在300 K时，具有分层结构缺陷的优化复合薄膜的功率因数（PF）接近1603 μ W m(-1) K-2（对应0.6 < ZT < 1.05），这是TE有机/无机复合材料的记录值。在半径为4毫米的杆周围弯曲1000次后，约92%的初始PF保持不变，表现出优异的柔韧性，这归功于柔性尼龙膜，多孔PEDOT/Ag2Se/CuAgSe膜，特别是PEDOT作为粘合剂的协同作用。在36 K的温度梯度下，由11个薄膜单支组成的柔性TE模块可产生45.8 mV的电压和3.2 mu W的最大功率（功率密度为8.4 W m(-2)），验证了薄膜优异的TE性能。本研究为高性能柔性TE薄膜的设计和制备提供了思路，并可推广到其他硫族化合物/PEDOT复合材料中，必将促进TE有机/无机复合薄膜的发展和应用。(C) 2020 Elsevier Ltd.版权所有。
The thermoelectric (TE) properties of organic/inorganic composite materials have been extensively studied for nearly one decade but there still has no significant breakthrough. Herein, we developed a facile method to prepare poly(3,4-ethylenedioxythiophene) (PEDOT)/Ag2Se/CuAgSe ternary composite films with ultrahigh performance and superior flexibility. First, PEDOT:poly(styrenesulfonate) (PSS)-coated Se (PC-Se) nanowires (NWs) were chemically in situ synthesized, then the PC-Se NWs were used as templates to prepare PEDOT:PSS coated Ag2Se/CuAgSe NWs, and finally highly flexible PEDOT/Ag2Se/CuAgSe ternary composite films on porous nylon membrane were fabricated by vacuum assisted filtration and then hot pressing. An optimized composite film with hierarchical microstructure defects shows a record power factor (PF) of similar to 1603 mu W m(-1) K-2 (corresponding 0.6 < ZT < 1.05) at 300 K, which is the record value for TE organic/inorganic composite materials. After bending for 1000 cycles around a 4-mm radius rod, about 92% of the initial PF is maintained, exhibiting an excellent flexibility, which is attributed to the synergetic effect of the flexible nylon membrane, the porous PEDOT/Ag2Se/CuAgSe film, and specifically the PEDOT as a binder. Moreover, a flexible TE module composed of 11 single-leg of the film generates a voltage of 45.8 mV and a maximum power of 3.2 mu W (power density of 8.4 W m(-2)) at a temperature gradient of 36 K, verifying excellent TE properties of the film. This work provides a great idea for design and fabrication of high-performance flexible TE films, which can be extended to other chalcogenides/PEDOT composites and will certainly promote the development and application of TE organic/inorganic composite films. (C) 2020 Elsevier Ltd. All rights reserved.