High Performance Flexible Tribo/Piezoelectric Nanogenerators based on BaTiO3/Chitosan Composites

Natural biopolymer materials have been of interest in wearable energy harvester technology, especially in biocompatible triboelectric nanogenerators (BTENGs), due to their biodegradable, biocompatible, nontoxic and excellent antibacterial properties. Nevertheless, obstacles concerning economical and...

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Bibliographic Details
Published in:Integrated ferroelectrics 2021-12, Vol.223 (1), p.137-151
Main Authors: Pongampai, Satana, Charoonsuk, Thitirat, Pinpru, Nattapong, Muanghlua, Rangson, Vittayakorn, Wanwilai, Vittayakorn, Naratip
Format: Article
Language:English
Subjects:
Barium titanates
BaTiO
Biocompatibility
Biodegradability
Biopolymers
Chitosan
Circuits
Electrical properties
Energy harvesting
Maximum power
nanocomposite-film
Nanocomposites
Nanogenerators
nanopowders
Open circuit voltage
Performance enhancement
Piezoelectricity
Short circuit currents
Triboelectric
Voltage stability
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Summary:Natural biopolymer materials have been of interest in wearable energy harvester technology, especially in biocompatible triboelectric nanogenerators (BTENGs), due to their biodegradable, biocompatible, nontoxic and excellent antibacterial properties. Nevertheless, obstacles concerning economical and biocompatible utilization of triboelectric nanogenerators (TENGs) continue to prevail. The natural biopolymer, chitosan (CS), is composed of a long biopolymer chain of N-acetyl glucosamine. It enables exciting opportunities for low-cost, biodegradable triboelectric nanogenerator (TENG) applications. However, the electrical output performance of CS based on TENGs is low when compared with devices constructed from synthetic polymers. Hence, to enhance electrical output performance, BaTiO 3 nano-powders (BT-NPs) were embedded into the CS as dielectric material, in order to improve electrical properties by increasing the dielectric constant of the composite film. A flexible hybrid piezo/triboelectric nanogenerator, designed by BT-NPs embedded into CS (BT-NPs/CS) composite film, was constructed successfully. The effects of the BaTiO 3 nano-powder (BT-NP) content on the output performance were explored systematically. The device with 5 wt% BT-NPs in CS, and a 160-μm-thick film, exhibited maximum open-circuit voltage (V OC ) and transferred short-circuit current (I SC ) of 110.8 V and 10 µA, respectively, as well as maximum power output of 431.8 µW. Practical and application demonstrations also were investigated, namely charged capacitors for storing energy, testing voltage stability and driving commercial LEDs. This work exhibited high electrical performance enhancement of BT-NPs/CS nanocomposite film, which demonstrated better material modification.
ISSN:1058-4587
1607-8489
DOI:10.1080/10584587.2021.1964293