Thermoelectric coolers (TEC) based on Peltier effect has been widely used in small scale cold storage because of its zero emission, and high efficiency, while wearable thermoelectric coolers (WTEC) for personal temperature management is garnered tremendous scientific attention. For out-of-plane structured WTEC using inorganic TE materials encapsuled in flexibility substrate, on the one hand, encapsulating materials are required to have low thermal conductivity, high reliability and high flexibility, and on the other hand, heat dissipation of devices is required to be lightweight, portable and efficient. For this reason, we propose a composite material synthesised from SiO aerogel, hollow glass beads (HGB) and polydimethylsiloxane (PDMS) as a filler, which takes advantage of the low thermal conductivity of (0.094 W/mK) to increase the temperature difference in the encapsulation layer of the device, and moreover performs the fabrication of honeycomb holes, which further reduces the thermal conductivity of the encapsulation layer and at the same time brings a certain degree of compression resistance to the device. Radiative cooling (RC) films synthesised using hexagonal boron nitride (HBN) and PDMS for lowering the temperature of the hot side in outdoor environments without additional energy consumption, providing heat dissipation at the hot side. Honeycomb wearable thermoelectric cooler (HWTEC) proposed in this work deliver high cooling temperature difference of 9.1 °C and 6.5 °C indoor and outdoor through human wear. Our work represents an important step in the development of flexible TE devices and is believed to have promising future applications in personal thermal management, e-skin and smart textiles.

中文翻译：

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采用低导热填料封装的可穿戴热电冷却器和蜂窝结构，具有高冷却效果


基于珀耳帖效应的热电冷却器（TEC）因其零排放和高效率而广泛应用于小型冷库，而用于个人温度管理的可穿戴热电冷却器（WTEC）则引起了巨大的科学关注。对于采用无机TE材料封装在柔性基板中的面外结构WTEC，一方面要求封装材料具有低热导率、高可靠性和高柔性，另一方面要求器件的散热轻便、便携、高效。为此，我们提出了一种由SiO气凝胶、空心玻璃珠（HGB）和聚二甲基硅氧烷（PDMS）作为填料合成的复合材料，该材料利用其低导热系数（0.094 W/mK）来增加室内温差。在器件的封装层上，还进行了蜂窝孔的制作，进一步降低了封装层的导热系数，同时给器件带来了一定的抗压能力。使用六方氮化硼（HBN）和PDMS合成的辐射冷却（RC）薄膜可在室外环境中降低热侧温度，无需额外的能源消耗，从而在热侧提供散热。这项工作中提出的蜂窝可穿戴热电冷却器（HWTEC）通过人体佩戴，可在室内和室外提供 9.1 °C 和 6.5 °C 的高冷却温差。我们的工作代表了柔性 TE 设备开发的重要一步，相信未来在个人热管理、电子皮肤和智能纺织品方面具有广阔的应用前景。