高度可变形和分层三维复合海绵，用于多功能热电能量转换

IF 6.9 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2025-02-19 DOI:10.1016/j.apsusc.2025.162730

Jong Min Park , Changyeon Baek , Min-Ku Lee , Nagamalleswara Rao Alluri , Gyoung-Ja Lee , Kyung Tae Kim , Kwi-Il Park

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引用次数: 0

摘要

采用有机材料可变形性高，可实现柔性、可穿戴的薄膜式热电发电机，而热电性能低、收割机厚度薄，阻碍了多用途能量转换的实现。本文通过在多孔聚合物模板结构上涂覆pvdf基TE溶液制成多孔TE复合海绵，设计了柔性可压缩teg。研究了复合材料中CNTs浓度的变化和施加压缩应变对多孔TE海绵的影响。在低压缩应变为10 %时，优化后的n型和p型TE海绵的功率因数分别为0.546 nW/m K2和3.534 nW/m K2。仔细测量了多孔单偶TEG随垂直/水平温度梯度（ΔT）和压缩应变的电响应。当垂直电压ΔT为70 K时，单对TEG的输出电压为16.08 mV, 0.935 μA, 3.92 nW。此外，面积为9 × 9 cm2的大面积多孔teg产生的人体热量输出功率为0.148 nW，真空泵过热输出功率为4.22 nW。这些结果为设计其他高效的基于有机-无机复合材料的teg铺平了道路，用于利用实时环境和工业热环境。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Highly deformable and hierarchical 3D composite sponge for versatile thermoelectric energy conversion

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Highly deformable and hierarchical 3D composite sponge for versatile thermoelectric energy conversion

Adopting organic materials enables the realization of flexible and wearable film-type thermoelectric generators (TEGs) due to high deformability, whereas the low thermoelectric (TE) properties and thin thickness of harvesters impede the realization of multipurpose energy conversion. Herein, flexible and compressible TEGs were designed by the porous TE composite sponges made of coating PVDF-based TE solutions on the porous polymeric template structure. The porous TE sponges were investigated by the change in the concentration of CNTs in the composites, and the applied compressive strains, respectively. The optimized n- and p-type TE sponges showed the power factor of 0.546 nW/mK² and 3.534 nW/mK², respectively, under a low compressive strain of 10 %. The electrical response dependent on vertical/horizontal temperature gradient (ΔT) and compressive strain of porous unicouple TEG were measured carefully. The unicouple TEG generates electrical output of 16.08 mV, 0.935 μA, and 3.92 nW when the vertical ΔT is 70 K. Furthermore, the large-area porous TEGs with an area of 9 × 9 cm² generates an output power of 0.148 nW from human body heat and 4.22 nW from the overheated vacuum pump. These results pave the way to design other efficient organic–inorganic composite-based TEGs for harnessing the real-time ambient and industrial heat environments.

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来源期刊

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.