Narasimulu, AA, Zhao, P, Soin, N et al. (8 more authors) (2017) Significant triboelectric enhancement using interfacial piezoelectric ZnO nanosheet layer. Nano Energy, 40. pp. 471-480. ISSN 2211-2855
Abstract
Utilising an interfacial piezoelectric ZnO nanosheet layer, a significant enhancement in the power density is reported for the triboelectric nanogenerators (TENG) based on phase inversion membranes of polyvinylidene fluoride (PVDF) and polyamide-6 (PA6). At an applied force of 80 N, the TENG device incorporating electrochemically deposited ZnO nanosheets produces an output voltage of ~625 V and a current density of ~40 mAm¯² (corresponding a charge density of 100.6 μCm¯²), respectively; significantly higher than ~310 V and ~10 mAm‾²(corresponding a charge density of 77.45 μCm¯²) for the pristine TENG device. The enhancement in the surface charge density provided by the interfacial piezoelectric ZnO layer is also reflected in the high piezoelectric coefficient d33 (−74 pmV¯¹) as compared to the pristine fluoropolymer membranes (−50 pmV¯¹). For tribo-negative membranes incorporating the interfacial ZnO layer, piezoelectric force microscopy measurements further show enhanced domain size which can be attributed to the interfacial dipole-dipole interaction with the ferroelectric polarization of PVDF, which promotes the alignment with the polar axis of ZnO. Under compressive stress, the piezoelectric potential thus produced in the ZnO nanosheets provides charge injection on to the surface of ZnSnO₃-PVDF membrane, improving the charge density, which in-turn significantly enhances the power density from 0.11 to ~1.8 W/m². The TENG devices thus fabricated using a facile electrochemical deposition and phase inversion technique show enhanced output power without the need for high electric field poling or external charge injection process by relying on coupling of triboelectric and piezoelectric effects.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 Elsevier Ltd. This is an author produced version of a paper published in Nano Energy. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Triboelectric; Piezoelectric; ZnO nanosheet layer; electrochemical deposition; polarisation; charge injection |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Electronic & Electrical Engineering (Leeds) > Pollard Institute (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 04 Sep 2017 11:30 |
Last Modified: | 31 Aug 2018 00:39 |
Published Version: | http://elsevier/ |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.nanoen.2017.08.053 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:120842 |