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3D mathematical model of contact-separation and single-electrode mode triboelectric nanogenerators
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Machine Elements.ORCID iD: 0000-0001-6085-7880
CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.College of Nanoscience and Technology, University of Chinese Academy of Sciences, Beijing, People's Republic of China.School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, United States.
2019 (English)In: Nano Energy, ISSN 2211-2855, E-ISSN 2211-3282, Vol. 60, p. 630-640Article in journal (Refereed) Published
Abstract [en]

Based on a set of finite-sized charged planes (FSCP), a simple time-dependent three-dimensional spatial model for the electric potential and electric field in an inhomogeneous medium composed of dielectric materials and metal contacts is proposed and used to assert triboelectric nanogenerator operation. Solving the problem of FSCP makes the three-dimensional spatial model relevant for practical TENG applications and allow for accurate and reliable results. Connecting the metal contacts to an electric resistance, Kirchhoff's law is used to derive a first-order time-dependent differential equation for the mobile charges on the metal contacts and the displacement current. Specially, the displacement current (Maxwell's displacement current) in a TENG equals to the conduction current in the external circuit is obtained. We then consider two important types of triboelectric nanogenerators: the contact-separation (CS) mode and the single-electrode (SEC) mode. A forced movement of the dielectric materials and/or the metal contacts leads to currents flowing in the system and a time-varying electrical potential, and therefore the generation of electrical power. Then, new and more accurate capacitance equations for CS and SEC modes of TENGs are extracted. Several examples of energy harvesting scenarios are finally analyzed.

Place, publisher, year, edition, pages
Elsevier, 2019. Vol. 60, p. 630-640
Keywords [en]
triboelectric nanogenerator, 3D mathematical model, Displacement current, Contact-mode, Single-electrode mode
National Category
Tribology (Interacting Surfaces including Friction, Lubrication and Wear)
Research subject
Machine Elements
Identifiers
URN: urn:nbn:se:ltu:diva-73336DOI: 10.1016/j.nanoen.2019.03.072ISI: 000467774100069Scopus ID: 2-s2.0-85063899114OAI: oai:DiVA.org:ltu-73336DiVA, id: diva2:1299664
Note

Validerad;2019;Nivå 2;2019-04-12 (johcin)

Available from: 2019-03-28 Created: 2019-03-28 Last updated: 2019-06-18Bibliographically approved

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Shi, Yijun

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