摘要
柔性热电器件在不规则的表面上可实现热能和电能的相互转化,在可穿戴电源和个性化热管理方面具有巨大的应用前景。为提高柔性热电器件的发电性能、制冷性能和可靠性,开发了一种具有超低内阻的柔性可自愈高性能热电器件。该柔性自愈合热电器件是通过将高性能块体碲化铋基热电臂、液态金属电极和铜箔相连接,并用动态共价热固性材料聚亚胺封装而成。测试结果表明,所制备的热电器件在温差为20 K时最大的输出功率可达6.16 mW,最大开路电压为450 mV。在通入0.5 A电流时柔性可自愈热电器件制冷温度可达到1.9℃。该器件在经历上千次弯曲循环和受到损伤再修复后,展现出极好的可靠性和自愈合能力。这将为制备高性能的热电发电及制冷器件提供基础理论与技术支撑,促进柔性电子器件的快速发展。
Flexible thermoelectric devices enable the interconversion of the thermal energy and electrical energy on irregular surfaces,which has great potential for wearable power sources and personalized thermal management.To enhance the power generation,cooling performance and reliability of flexible thermoelectric devices,a novel flexible self-healing high-performance thermoelectric device with ultra-low internal resistance was developed.The flexible self-healing thermoelectric device was fabricated by connecting high-performance bulk bismuth telluride-based thermoelectric legs,liquid metal electrodes and copper foil,all encapsulated with dynamic covalent thermosetting-material polyimide.The test results demonstrate that the prepared thermoelectric device achieves the maximum output power of 6.16 mW and a maximum open-circuit voltage of 450 mV under the temperature difference of 20 K.The flexible self-healing thermoelectric device exhibits a cooling temperature of 1.9℃when a current of 0.5 A is applied.The device exhibits excellent reliability and self-healing capability after thousands of bending cycles and damage followed by repair.This breakthrough provides the foundational theory and technological support for developing high-performance thermoelectric power generation and cooling devices,thus propelling the rapid advancement of the flexible electronic devices.
作者
王亚玲
王静
吴莉莉
陈若玙
朱鹏程
WANG Yaing;WANG Jing;WU Lii;CHEN Ruoyu;ZHU Pengcheng(College of Science,Henan Agricultural University,Zhengzhou450002,China;School of Physics and Microelectronics,Zhengzhou University,Zhengzhou450001,China)
出处
《电子元件与材料》
CAS
北大核心
2023年第8期996-1002,共7页
Electronic Components And Materials
基金
国家自然科学基金(52203310)
河南农业大学人才引进专项(30501054)
河南省高等学校重点科研项目(23B140001)。
关键词
柔性热电器件
自愈合
发电
制冷
可靠性
flexible thermoelectric devices
self-healing
power generation
cooling
reliability
