柔性、可拉伸变形微型热电器件的设计与集成
收稿日期: 2022-04-17
修回日期: 2022-06-10
网络出版日期: 2022-06-22
基金资助
国家自然科学基金项目(52073290);国家自然科学基金项目(51927803);辽宁省杰出青年科学基金项目(2023JH6/100500004);辽宁省自然科学基金项目(2022-MS-011);沈阳市科技计划项目(23-407-3-23)
Design and Integration of Flexible and Stretchable Micro-Thermoelectric Devices
Received date: 2022-04-17
Revised date: 2022-06-10
Online published: 2022-06-22
Supported by
National Natural Science Foundation of China(52073290);National Natural Science Foundation of China(51927803);Science Fund for Distinguished Young Scholars of Liaoning Province(2023JH6/100500004);Natural Science Foundation of Liaoning Province(2022-MS-011);Shenyang Science and Technology Plan Project(23-407-3-23)
在能源匮乏、环境污染严重的今天，研发可循环利用、环境友好的新型能源材料与器件具有重要意义。热电材料可直接实现热能与电能的相互转换，为解决这一问题提供了新的途径。特别是，近年来由于柔性热电器件展现出自供电、可穿戴等优势，受到了人们的高度重视。本工作通过引入聚二甲基硅氧烷(polydimethylsiloxane，PDMS)基底，利用单壁碳纳米管(single-wall carbon nanotube，SWCNT)/Bi2Te3热电复合薄膜材料优异的热电性能和柔韧性，设计制作了一种可拉伸变形的三维拱形结构的微型热电发电器件。该器件充分利用薄膜材料面内最佳热电性能方向，通过器件内外温差获得热-电性能转换，在电极两端产生电势差，实现发电。该微型柔性热电器件在温差为4 K时，输出电压为4.8 mV，最大输出功率达2.6 × 10-9 W，功率密度为3.9 × 10-9 W/cm2，器件的最小弯曲半径为3 mm。这种微型柔性热电器件的制备工艺简单易行、成本低廉，为柔性热电薄膜发电器件的研制提供了新途径。
关键词： SWCNT/Bi2Te3热电复合薄膜; 可拉伸变形; 微型柔性热电器件
刘瑞 , 于治 , 赵洋 , 李晓齐 , 喻海龙 , 何娟 , 聂鹏程 , 王春雨 , 邰凯平 , 刘畅 . 柔性、可拉伸变形微型热电器件的设计与集成[J]. 金属学报, 2024 , 60(3) : 348 -356 . DOI: 10.11900/0412.1961.2022.00171
A miniature flexible thermoelectric generator with a stretchable three-dimensional (3D) arch structure is designed using polydimethylsiloxane (PDMS) as a substrate and the excellent thermoelectric properties and flexibility of single-wall carbon nanotube (SWCNT)/Bi2Te3 thermoelectric hybrid film. The device fully utilizes optimal in-plane thermoelectric performance direction of the film material and obtains electro-thermal conversion through temperature differences between the inside and outside of the device plane. Therefore, thermoelectric potential is generated at both ends of the electrode to achieve power generation. When the temperature difference was 4 K, the output voltage is 4.8 mV, the maximum output power is 2.6 × 10-9 W, the power density is 3.9 × 10-9 W/cm2, and the minimum bending radius of the device can reach 3 mm. The fabrication process for this miniature flexible thermoelectric device is simple, feasible, and low-cost, providing a new avenue for developing flexible thermoelectric thin-film power generation devices.
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