Journal
APPLIED MATERIALS TODAY
Volume 18, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apmt.2019.100496
Keywords
Triboelectric nanogenerators; Mechanical energy harvesting; Charge decay; Charge accumulation; Thin dielectric layer
Categories
Funding
- National Key R&D Project from Minister of Science and Technology [2016YFA0202704]
- National Natural Science Foundation of China [61774016,21773009, 51432005, 5151101243, 51561145021]
- Beijing Municipal Science & Technology Commission [Z171100000317001, Z171100002017017, Y3993113DF]
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Although high charge densities of triboelectric nanogenerators (TENG) were achieved by working in high vacuum or charge pumping techniques in atmosphere, owing to their complex structure and/or stability issues, it still remains a great challenge and necessity to directly obtain the high charge density directly through triboelectrification effect in atmosphere. Here, a basic theory about the limitation factors of surface charge density is comprehensively rebuilt through analytical mathematical derivation of the limitation equation. As a result, high surface charge density can be obtained directly by a new optimization methodology, i.e. using thin dielectric layer, which is demonstrated by the designed contact-separation model TENG and sliding model TENG. In addition, the theoretical models of charge decay and charge accumulation during triboelectrification process were built. This work provides not only a new facile and universal optimization methodology for TENG, but also a new insight in the triboelectrification process, both of which will prompt the applications of TENG ranging from powering electronic devices to harvesting large-scale blue energy. (C) 2019 Elsevier Ltd. All rights reserved.
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