Giant thermopower of ionic gelatin near room temperature

doi:10.1126/science.aaz5045

GSTDTAP > 气候变化

DOI	10.1126/science.aaz5045
	Giant thermopower of ionic gelatin near room temperature
	Cheng-Gong Han; Xin Qian; Qikai Li; Biao Deng; Yongbin Zhu; Zhijia Han; Wenqing Zhang; Weichao Wang; Shien-Ping Feng; Gang Chen; Weishu Liu
	2020-06-05
发表期刊	Science
出版年	2020
英文摘要	Using ions as charge carriers in thermoelectric devices usually requires using either thermal diffusion or redox reactions at two electrodes with different temperatures. Han et al. leveraged both of these strategies to develop a gelatin-based ionic thermoelectric device that uses alkali salts and an iron-based redox couple to generate a large thermopower. This device is capable of generating useful amounts of energy from body heat. Science , this issue p. [1091][1] Harvesting heat from the environment into electricity has the potential to power Internet-of-things (IoT) sensors, freeing them from cables or batteries and thus making them especially useful for wearable devices. We demonstrate a giant positive thermopower of 17.0 millivolts per degree Kelvin in a flexible, quasi-solid-state, ionic thermoelectric material using synergistic thermodiffusion and thermogalvanic effects. The ionic thermoelectric material is a gelatin matrix modulated with ion providers (KCl, NaCl, and KNO3) for thermodiffusion effect and a redox couple [Fe(CN)64–/Fe(CN)63–] for thermogalvanic effect. A proof-of-concept wearable device consisting of 25 unipolar elements generated more than 2 volts and a peak power of 5 microwatts using body heat. This ionic gelatin shows promise for environmental heat-to-electric energy conversion using ions as energy carriers. [1]: /lookup/doi/10.1126/science.aaz5045
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/273439
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Cheng-Gong Han,Xin Qian,Qikai Li,et al. Giant thermopower of ionic gelatin near room temperature[J]. Science,2020.
APA	Cheng-Gong Han.,Xin Qian.,Qikai Li.,Biao Deng.,Yongbin Zhu.,...&Weishu Liu.(2020).Giant thermopower of ionic gelatin near room temperature.Science.
MLA	Cheng-Gong Han,et al."Giant thermopower of ionic gelatin near room temperature".Science (2020).