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. 2017 Jul 20;8:88. doi: 10.1038/s41467-017-00131-4

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© The Author(s) 2017

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 3 — Working mechanism and output performance of TENG with the coupling of surface and dielectric polarization. a Working mechanism of the TENG with the integration of triboelectric material PTFE with ferroelectric material BT. b Charge density, c open-circuit voltage, and d short-circuit current of the TENG in atmosphere and high vacuum. e,f Current density and power density of TENG with various loads at e atmosphere and f vacuum (P ~ 10⁻⁶ torr). g Comparison of the output charges density measured in this work with previously reported ones