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Lead-free and flexible piezoelectric nanogenerator based on CaBi4Ti4O15 Aurivillius oxides/ PDMS composites for efficient biomechanical energy harvesting

Title
Lead-free and flexible piezoelectric nanogenerator based on CaBi4Ti4O15 Aurivillius oxides/ PDMS composites for efficient biomechanical energy harvesting
Authors
Hajra, SugatoSahu, ManishaOh, DongikKim, Hoe Joon
DGIST Authors
Hajra, Sugato; Sahu, Manisha; Oh, Dongik; Kim, Hoe Joon
Issue Date
2021-06
Citation
Ceramics International, 47(11), 15695-15702
Type
Article
Author Keywords
Aurivillius oxidesLead-freeImpedanceDielectricPiezoelectric nanogenerator
Keywords
BISMUTH TITANATECONDUCTIVITY
ISSN
0272-8842
Abstract
The development of a new class of perovskite materials and enhancing its capability as an energy harvester that scavenges energy from various sources to power electronics systems has attracted significant attention. Herein, we report a cost-effective approach to synthesize a perovskite material, explore its properties, and further develop a high-performance flexible nanogenerator based on hybrid piezoelectric composite. The Aurivillius-based oxide, CaBi4Ti4O15 (CBTO) was fabricated via a mixed oxide reaction and crystallized in an orthorhombic symmetry at room temperature. The material properties were elucidated to act as a parallel plate capacitor that will further act as a base for the development of filter circuits. Aurivillus/PDMS composite films were used to fabricate a flexible Aurivillus-based piezoelectric nanogenerator (A-PENG) to act as a self-powered exercise counter and power the electronics. The A-PENG was systematically analyzed under different conditions such as weight percentage, before and after poling, and acceleration effects. In addition, device stability, and capacitor charging-discharging tests were performed. This study elucidated the formation of lead-free ceramic materials that were used to make a flexible composite film for the realization of a piezoelectric harvester acting as a sustainable energy source. © 2021 Elsevier Ltd and Techna Group S.r.l.
URI
http://hdl.handle.net/20.500.11750/14010
DOI
10.1016/j.ceramint.2021.02.140
Publisher
Pergamon Press Ltd.
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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