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Flexible, High-Power Density, Wearable Thermoelectric Nanogenerator and Self-Powered Temperature Sensor
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-10-08 , DOI: 10.1021/acsami.9b11435 Rui Feng , Fei Tang , Ning Zhang 1 , Xiaohao Wang
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2019-10-08 , DOI: 10.1021/acsami.9b11435 Rui Feng , Fei Tang , Ning Zhang 1 , Xiaohao Wang
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We propose a flexible and wearable thermoelectric nanogenerator (FTEG) made from Bi2Te3, which allows high voltage and output power density. The proposed FTEG works as a thermopile with the end-to-end connection of 126 thermoelectric legs, and which is fabricated through magnetron sputtering Cu conductor on polyethylene terephthalate film. Bi, Te, Sb, and Se alloys are used to prepare thermoelectric materials by doping in a fixed proportion and zone melting, and nickel plating on the surface mitigates the deterioration of thermoelectric properties caused by the diffusion of Cu atoms or Cu+ ions. The thermoelectric figure of merit is stable and maintained above 0.7, up to 1.02. More flexibility is allowed by employing double sinusoidal serpentine connecting wires, and no significant property changes are observed even after being folded 200 times. When the temperature difference reaches 50 K, the output voltage of the FTEG will be no less than 520 mV, and the power density will reach 11.14 mW·cm–2. By integration of a low-power, low-threshold voltage boost circuit on the back end of the FTEG, the electronic watch with a liquid crystal display screen can be easily powered to work properly. Furthermore, the FTEG is temperature-sensitive and, thus, can be used for temperature measurement with a resolution of 0.5 K. This work may have important prospects in flexible wearable physical sensors and individualized medical care.
中文翻译：
灵活的高功率密度可穿戴热电纳米发电机和自供电温度传感器
我们提出了一种由Bi 2 Te 3制成的柔性可穿戴热电纳米发电机（FTEG），它可以实现高电压和高输出功率密度。拟议的FTEG用作热电堆，具有126个热电腿的端对端连接，并通过磁控溅射Cu导体在聚对苯二甲酸乙二醇酯薄膜上制成。Bi，Te，Sb和Se合金用于通过按固定比例掺杂和区域熔化来制备热电材料，表面镀镍可减轻由于Cu原子或Cu +的扩散而引起的热电性能的下降。离子。热电性能指标稳定并保持在0.7以上，最高为1.02。通过使用双正弦形蛇形连接线可以提供更大的灵活性，即使折叠200次后也没有观察到明显的性能变化。当温差达到50 K时，FTEG的输出电压将不小于520 mV，功率密度将达到11.14 mW·cm –2。通过在FTEG的后端集成一个低功率，低阈值升压电路，可以很容易地为带有液晶显示屏的电子表供电，使其正常工作。此外，FTEG对温度敏感，因此可用于分辨率为0.5 K的温度测量。这项工作在柔性可穿戴物理传感器和个性化医疗保健中可能具有重要的前景。
更新日期：2019-10-10
中文翻译：
灵活的高功率密度可穿戴热电纳米发电机和自供电温度传感器
我们提出了一种由Bi 2 Te 3制成的柔性可穿戴热电纳米发电机（FTEG），它可以实现高电压和高输出功率密度。拟议的FTEG用作热电堆，具有126个热电腿的端对端连接，并通过磁控溅射Cu导体在聚对苯二甲酸乙二醇酯薄膜上制成。Bi，Te，Sb和Se合金用于通过按固定比例掺杂和区域熔化来制备热电材料，表面镀镍可减轻由于Cu原子或Cu +的扩散而引起的热电性能的下降。离子。热电性能指标稳定并保持在0.7以上，最高为1.02。通过使用双正弦形蛇形连接线可以提供更大的灵活性，即使折叠200次后也没有观察到明显的性能变化。当温差达到50 K时，FTEG的输出电压将不小于520 mV，功率密度将达到11.14 mW·cm –2。通过在FTEG的后端集成一个低功率，低阈值升压电路，可以很容易地为带有液晶显示屏的电子表供电，使其正常工作。此外，FTEG对温度敏感，因此可用于分辨率为0.5 K的温度测量。这项工作在柔性可穿戴物理传感器和个性化医疗保健中可能具有重要的前景。
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