Ferroelectric-assisted high-performance triboelectric nanogenerators based on electrospun P(VDF-TrFE) composite nanofibers with barium titanate nanofillers

Min, G., Pullanchiyodan, A., Dahiya, A. S. , Hosseini, E. S., Xu, Y. , Mulvihill, D. M. and Dahiya, R. (2021) Ferroelectric-assisted high-performance triboelectric nanogenerators based on electrospun P(VDF-TrFE) composite nanofibers with barium titanate nanofillers. Nano Energy, 90(Part A), 106600. (doi: 10.1016/j.nanoen.2021.106600)

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Triboelectric nanogenerators (TENGs) are flexible, efficient, and cost-effective energy harvesters. Here, we develop high-performance ferroelectric-assisted TENGs using electrospun fibrous surfaces based on P(VDF-TrFE) with dispersed BaTiO3 (BTO) nanofillers in either cubic (CBTO) or tetragonal (TBTO) form. TENGs with three types of tribo-negative surface (pristine P(VDF-TrFE), P(VDF-TrFE)/CBTO and P(VDF-TrFE)/TBTO) in contact with PET were investigated and output increased progressively from pristine (0.75 W/m2) to CBTO (2 W/m2) and to TBTO (2.75 W/m2). Accounting for contact pressure, the max output (Voc = 315 V & Jsc = 6.7 µA/cm2) is significantly higher than for TENGs having spin-coated P(VDF-TrFE)/BTO. It is hypothesized that electrospinning increases dipole alignment due to high applied voltages, but also aids the formation of a highly oriented crystalline β-phase via uniaxial stretching. Essentially, tribo-charge transfer is boosted due to increased surface potential owing to enhanced ferroelectric polarization. P(VDF-TrFE)/TBTO produced higher output than P(VDF-TrFE)/CBTO even though permittivity is nearly identical. Thus, it is shown that BTO fillers boost output, not just by increasing permittivity, but also by enhancing the crystallinity and amount of the β-phase (as TBTO produced a more crystalline β-phase present in greater amounts). Finally, the ferroelectric-assisted TENG was integrated with a flexible graphene electrode-based supercapacitor to produce a self-charging system capable of charging to 1.25 V in just 5 mins. These results demonstrate that this technology can be valuable in wearable applications where higher power output, more efficient charging and flexibility are paramount.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Dahiya, Dr Abhishek Singh and Pullanchiyodan, Dr Abhilash and Xu, Dr Yang and Dahiya, Professor Ravinder and Mulvihill, Dr Daniel and Min, Guanbo
Creator Roles:
Min, G.Investigation, Methodology, Software, Validation, Formal analysis, Visualization, Writing – original draft
Pullanchiyodan, A.Methodology, Investigation, Writing – review and editing
Dahiya, A. S.Investigation, Validation, Writing – review and editing
Xu, Y.Investigation, Software, Formal analysis, Writing – review and editing
Mulvihill, D.Supervision, Conceptualization, Writing – review and editing, Project administration, Funding acquisition
Dahiya, R.Conceptualization, Supervision, Formal analysis, Resources, Writing – review and editing, Funding acquisition, Project administration
Authors: Min, G., Pullanchiyodan, A., Dahiya, A. S., Hosseini, E. S., Xu, Y., Mulvihill, D. M., and Dahiya, R.
College/School:College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Nano Energy
ISSN (Online):2211-3282
Published Online:08 October 2021
Copyright Holders:Copyright © 2021 The Authors
First Published:First published in Nano Energy 90(Part A): 106600
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
301728Engineering Fellowships for Growth: Printed Tactile SKINRavinder DahiyaEngineering and Physical Sciences Research Council (EPSRC)EP/R029644/1ENG - Electronics & Nanoscale Engineering