期刊
ADVANCED MATERIALS
卷 30, 期 38, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803968
关键词
atomic thermal vibration; contact-electrification; nanogenerators; thermionic emission; triboelectrification
类别
资金
- Hightower Chair foundation
- MANA, NIMS (Japan)
- National Key R AMP
- D Project from Minister of Science and Technology, China [2016YFA0202704]
- National Natural Science Foundation of China [51432005, 5151101243, 51561145021]
- Six Talent Peaks Project in Jiangsu Province, China [2015-XCL-009]
- Outstanding Teacher Overseas Research Project of China University of Mining and Technology
As previously demonstrated, contact-electrification (CE) is strongly dependent on temperature, however the highest temperature in which a triboelectric nanogenerator (TENG) can still function is unknown. Here, by designing and preparing a rotating free-standing mode Ti/SiO2 TENG, the relationship between CE and temperature is revealed. It is found that the dominant deterring factor of CE at high temperatures is the electron thermionic emission. Although it is normally difficult for CE to occur at temperatures higher than 583 K, the working temperature of the rotating TENG can be raised to 673 K when thermionic emission is prevented by direct physical contact of the two materials via preannealing. The surface states model is proposed for explaining the experimental phenomenon. Moreover, the developed electron cloud-potential well model accounts for the CE mechanism with temperature effects for all types of materials. The model indicates that besides thermionic emission of electrons, the atomic thermal vibration also influences CE. This study is fundamentally important for understanding triboelectrification, which will impact the design and improve the TENG for practical applications in a high temperature environment.
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