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Lead-free flexible Bismuth Titanate-PDMS composites: A multifunctional colossal dielectric material for hybrid piezo-triboelectric nanogenerator to sustainably power portable electronics

Title
Lead-free flexible Bismuth Titanate-PDMS composites: A multifunctional colossal dielectric material for hybrid piezo-triboelectric nanogenerator to sustainably power portable electronics
Authors
Hajra, SugatoPadhan, Aneeta ManjariSahu, ManishaAlagarsamy, PerumalLee, KyungtaekKim, Hoe Joon
DGIST Authors
Hajra, Sugato; Padhan, Aneeta Manjari; Sahu, Manisha; Alagarsamy, Perumal; Lee, Kyungtaek; Kim, Hoe Joon
Issue Date
2021-11
Citation
Nano Energy, 89, 106316
Type
Article
Author Keywords
Colossal dielectricsFerroelectricHybrid nanogeneratorInternal polarizationPiezoelectricTriboelectric
Keywords
MicrochannelsNanogeneratorsPiezoelectricityTitanium compoundsTriboelectricityBi$-4$/Ti$-3$/O$-12$Bismuth titanateColossal dielectricsFerroelectricHybrid nanogeneratorInternal polarizationLead-FreeNanogeneratorsPiezoelectricTriboelectricPolarizationRietveld refinement3D printersBismuth compoundsComposite filmsCost effectivenessDielectric materialsLead compounds
ISSN
2211-2855
Abstract
This study presents a multiunit hybrid piezo-triboelectric nanogenerator (HNG), utilizing both the triboelectric and piezoelectric effects, constructed from Bismuth Titanate, Bi4Ti3O12 (BiTO)/polydimethylsiloxane (PDMS) composite films through a simple and cost-effective fabrication technique. The BiTO samples synthesized by a mixed oxide route crystallize in the orthorhombic symmetry, as confirmed by the Rietveld refinement of the structural data. The temperature- and frequency-dependent dielectric spectra elucidate the colossal dielectric properties of BiTO, originating from the combined effects of interfacial polarization, hopping polarization, and extrinsic electrode effect. The colossal dielectric BiTO leads to the amplification of internal polarization, providing enhanced output performance of the HNG device. As a result, the HNG devices exhibit multiple folds improvement in terms of power density compared to individual PDMS-BiTO composite-based PENG and TENG devices. Subsequently, a new design of device structure comprising a multiunit HNG device is constructed with the help of a 3D printed structure and a ball, delivering the voltage and current output of 300 V and 4.7 μA, respectively. Finally, the HNG device is utilized for biomechanical energy harvesting and powering various electronics like LEDs, a calculator, and a wristwatch. © 2021
URI
http://hdl.handle.net/20.500.11750/13999
DOI
10.1016/j.nanoen.2021.106316
Publisher
Elsevier BV
Related Researcher
  • Author Kim, Hoe Joon Nano Materials and Devices Lab
  • Research Interests MEMS/NEMS; Micro/Nano Sensors; Piezoelectric Devices; Nanomaterials; Heat Transfer; Atomic Force Microscope
Files:
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Collection:
Department of Robotics and Mechatronics EngineeringNano Materials and Devices Lab1. Journal Articles


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