Flexible thermoelectric generator with liquid metal interconnects and low thermal conductivity silicone filler
Flexible thermoelectric generator with liquid metal interconnects and low thermal conductivity silicone filler
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DOI：
10.1038/s41528-021-00101-3
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发表时间：
2021-03-08
影响因子：
14.6
通讯作者：
Ozturk, Mehmet C.
中科院分区：
文献类型：
--
作者：
Padmanabhan Ramesh, Viswanath;Sargolzaeiaval, Yasaman;Ozturk, Mehmet C.
利用热电收集身体热量为实现自供电的可穿戴电子产品提供了一条有前途的道路，这些电子产品可以实现连续，长期，不间断的健康监测。本文报道了一种灵活的热电发电机（TEG），提供了有效的转换身体热量到电能。该器件依赖于一种低热导率的气凝胶-硅树脂复合材料，该复合材料使用可拉伸的共晶镓-铟（EGaIn）液态金属互连来固定和热隔离串联连接的各个半导体元件。该复合材料由混合到聚二甲基硅氧烷（PDMS）中的气凝胶颗粒组成，使硅橡胶的导热率降低了50%。戴在手腕上，灵活的TEG目前的输出功率密度数字接近35 μ Wcm（-2）在1.2 ms（-1）的空气速度，相当于步行速度。结果表明，这些柔性TEG可以作为低功耗可穿戴电子产品的主要能源。
Harvesting body heat using thermoelectricity provides a promising path to realizing self-powered, wearable electronics that can achieve continuous, long-term, uninterrupted health monitoring. This paper reports a flexible thermoelectric generator (TEG) that provides efficient conversion of body heat to electrical energy. The device relies on a low thermal conductivity aerogel-silicone composite that secures and thermally isolates the individual semiconductor elements that are connected in series using stretchable eutectic gallium-indium (EGaIn) liquid metal interconnects. The composite consists of aerogel particulates mixed into polydimethylsiloxane (PDMS) providing as much as 50% reduction in the thermal conductivity of the silicone elastomer. Worn on the wrist, the flexible TEGs present output power density figures approaching 35 mu Wcm(-2) at an air velocity of 1.2 ms(-1), equivalent to walking speed. The results suggest that these flexible TEGs can serve as the main energy source for low-power wearable electronics.