期刊
NATURE NANOTECHNOLOGY
卷 16, 期 7, 页码 811-+出版社
NATURE PORTFOLIO
DOI: 10.1038/s41565-021-00903-6
关键词
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资金
- National Key RAMP
- D Program of China [2017YFB1104300]
- National Science Foundation of China [22035005, 52022051, 22075165, 52073159, 52090030]
- Tsinghua University Initiative Scientific Research Program [2019Z08QCX08]
- NSFC-STINT [21911530143]
- State Key Laboratory of Tribology [SKLT2021B03]
- Tsinghua-Foshan Innovation Special Fund [2018THFS0412, 2019GQG1025]
A heterogeneous moisture-enabled electric generator has been developed, which can generate high voltage at low humidity and power various electronic devices.
Environmentally adaptive power generation is attractive for the development of next-generation energy sources. Here we develop a heterogeneous moisture-enabled electric generator (HMEG) based on a bilayer of polyelectrolyte films. Through the spontaneous adsorption of water molecules in air and induced diffusion of oppositely charged ions, one single HMEG unit can produce a high voltage of similar to 0.95 V at low (25%) relative humidity (RH), and even jump to 1.38 V at 85% RH. A sequentially aligned stacking strategy is created for large-scale integration of HMEG units, to offer a voltage of more than 1,000 V under ambient conditions (25% RH, 25 degrees C). Using origami assembly, a small section of folded HMEGs renders an output of up to 43 V cm(-3). Such integration devices supply sufficient power to illuminate a lamp bulb of 10 W, to drive a dynamic electronic ink screen and to control the gate voltage for a self-powered field effect transistor.
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