期刊
SCIENCE
卷 368, 期 6495, 页码 1091-+出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aaz5045
关键词
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资金
- Center for Mechanical Engineering Research and Education at MIT
- Center for Mechanical Engineering Research and Education at SUSTech
- Guangdong Innovation Research Team Project [2016ZT06G587, 2017ZT07C062]
- Shenzhen Sci-Tech Fund [KYTDPT20181011104007]
- Tencent Foundation through the XPLORER PRIZE
- Guangdong Provincial Key-Lab Program [2019B030301001]
- Shenzhen Municipal Key-Lab Program [ZDSYS20190902092905285]
- Shenzhen Pengcheng-Scholarship Program
- Ministry of Industry and Information Technology of the People's Republic of China [2016YFB0901600]
- Tianjin City Distinguish Young Scholar Fund
- National Natural Science Foundation of China [21573117, 11674289]
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)(6)(4-)/Fe(CN)(6)(3-)] 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.
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