TY  - CONF
AU  - Bobić, Jelena
AU  - Ilić, Nikola
AU  - Despotovic, Zeljko V.
AU  - Džunuzović, Adis
AU  - Grigalaitis, Robertas
AU  - Stijepovic, Ivan
AU  - Vijatović Petrović, Mirjana
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2426
AB  - For the last decades, energy harvesters based on piezoelectricity from mechanical vibration (wind, human activities, vibrations of machines and traffic, ocean waves, and acoustic waves) are explored extensively for its functionality in energy technologies. Typical applications that could benefit from mechanical energy harvesting are that many sensors, alarms, LED lights, and other low-power and ultra-low-power devices can be driven energetically completely independently [1]. To fabricate a flexible piezoelectric energy harvester (FPEHs) that operates under various conditions, ceramic particles were blended with a polymer to form composite films.
Two-phase lead-free BaZr0.2Ti0.8/PVDF and lead-based PbZr0.52Ti0.48/PVDF piezocomposites, as well as three-phase PbZr0.52Ti0.48/Ni0.7Zn0.3Fe2O4/PVDF composites films with variable filler content (up to 50 vol.%) have been prepared by hot pressing method. Structure and morphology of piezo-active phase powders as well as distribution of filler in obtained flexible films were characterized by XRD and SEM analysis. Total amount of electroactive phase (% FEA) of PVDF in all films were investigated by FTIR analysis. In all composites dielectric permittivities was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strength and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in all types of flexible films. Also, ferromagnetic response was established in PZT/ferrite/PVDF films under magnetic field of 10 kOe.
Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of.
PB  - The Serbian Society for Ceramic Materials
C3  - 7th Conference of The Serbian Society for Ceramic Materials
T1  - TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2426
ER  - 

@conference{
author = "Bobić, Jelena and Ilić, Nikola and Despotovic, Zeljko V. and Džunuzović, Adis and Grigalaitis, Robertas and Stijepovic, Ivan and Vijatović Petrović, Mirjana",
year = "2023",
abstract = "For the last decades, energy harvesters based on piezoelectricity from mechanical vibration (wind, human activities, vibrations of machines and traffic, ocean waves, and acoustic waves) are explored extensively for its functionality in energy technologies. Typical applications that could benefit from mechanical energy harvesting are that many sensors, alarms, LED lights, and other low-power and ultra-low-power devices can be driven energetically completely independently [1]. To fabricate a flexible piezoelectric energy harvester (FPEHs) that operates under various conditions, ceramic particles were blended with a polymer to form composite films.
Two-phase lead-free BaZr0.2Ti0.8/PVDF and lead-based PbZr0.52Ti0.48/PVDF piezocomposites, as well as three-phase PbZr0.52Ti0.48/Ni0.7Zn0.3Fe2O4/PVDF composites films with variable filler content (up to 50 vol.%) have been prepared by hot pressing method. Structure and morphology of piezo-active phase powders as well as distribution of filler in obtained flexible films were characterized by XRD and SEM analysis. Total amount of electroactive phase (% FEA) of PVDF in all films were investigated by FTIR analysis. In all composites dielectric permittivities was increased in contrast to their polymer PVDF host matrix, but also displayed decreased breakdown strength and raised energy loss. In addition, the remnant polarization (Pr) and leakage current were also investigated to evaluate the breakdown strength in all types of flexible films. Also, ferromagnetic response was established in PZT/ferrite/PVDF films under magnetic field of 10 kOe.
Calculations of storage energies and output voltage obtained for the investigated materials revealed an increasing trend with increasing amount of active phase. The maximum storage energy of 0.42 J/cm3 at 390 kV/cm3 was obtained for PZT-PVDF (40-60) films while the maximum output voltage of about 10 V was obtained for PZT-PVDF (50-50) flexible film. In addition, comparisons between properties of.",
publisher = "The Serbian Society for Ceramic Materials",
journal = "7th Conference of The Serbian Society for Ceramic Materials",
title = "TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2426"
}

Bobić, J., Ilić, N., Despotovic, Z. V., Džunuzović, A., Grigalaitis, R., Stijepovic, I.,& Vijatović Petrović, M.. (2023). TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS. in 7th Conference of The Serbian Society for Ceramic Materials
The Serbian Society for Ceramic Materials..
https://hdl.handle.net/21.15107/rcub_rimsi_2426

Bobić J, Ilić N, Despotovic ZV, Džunuzović A, Grigalaitis R, Stijepovic I, Vijatović Petrović M. TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS. in 7th Conference of The Serbian Society for Ceramic Materials. 2023;.
https://hdl.handle.net/21.15107/rcub_rimsi_2426 .

Bobić, Jelena, Ilić, Nikola, Despotovic, Zeljko V., Džunuzović, Adis, Grigalaitis, Robertas, Stijepovic, Ivan, Vijatović Petrović, Mirjana, "TWO-PHASE AND THREE-PHASE FLEXIBLE THICK FILMS: POTENTIAL USE AS ENERGY STORAGE AND ENERGY HARVESTING SYSTEMS" in 7th Conference of The Serbian Society for Ceramic Materials (2023),
https://hdl.handle.net/21.15107/rcub_rimsi_2426 .

TY  - CONF
AU  - Despotovic, Zeljko V.
AU  - Vijatović Petrović, Mirjana
AU  - Bobić, Jelena
AU  - Džunuzović, Adis
AU  - MERCADELLI, ELISA
PY  - 2023
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2126
AB  - The paper presents the realization of an experimental setup used for testing energy harvesting and storage devices based on the use of lead-free bismuth sodium titanate-barium titanate (NBT-BT) in combination with polyvinylidene fluoride (PVDF) polymer. PVDF is a polymer matrix in which
piezoelectric phase is dispersed and enables formation of flexible films by hot pressing method. The paper presents an electromechanical model of a typical PVDF module, generates a
simulation model, and presents simulation results. The experimental setup is based on a mechanical excitation for generating pulses of an force of different amplitude and duration,
applied on the aforementioned energy harvesting NBT-BT-PVDF devices, likewise, on an electronic assembly for measuring the pulses of electrical quantities (current and voltage), that are
generated at the output electrodes. The research in this paper is predominantly experimental and it shows the obtained oscilloscope recordings of the excitation force and output voltage
of energy harvesting modules at different modes and conditionsof mechanical excitation. After this, a comparison of the simulation and experimental results is made.
PB  - IEEE
C3  - 22nd International Symposium INFOTEH-JAHORINA
T1  - Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films
DO  - 10.1109/INFOTEH57020.2023.10094150
ER  - 

@conference{
author = "Despotovic, Zeljko V. and Vijatović Petrović, Mirjana and Bobić, Jelena and Džunuzović, Adis and MERCADELLI, ELISA",
year = "2023",
abstract = "The paper presents the realization of an experimental setup used for testing energy harvesting and storage devices based on the use of lead-free bismuth sodium titanate-barium titanate (NBT-BT) in combination with polyvinylidene fluoride (PVDF) polymer. PVDF is a polymer matrix in which
piezoelectric phase is dispersed and enables formation of flexible films by hot pressing method. The paper presents an electromechanical model of a typical PVDF module, generates a
simulation model, and presents simulation results. The experimental setup is based on a mechanical excitation for generating pulses of an force of different amplitude and duration,
applied on the aforementioned energy harvesting NBT-BT-PVDF devices, likewise, on an electronic assembly for measuring the pulses of electrical quantities (current and voltage), that are
generated at the output electrodes. The research in this paper is predominantly experimental and it shows the obtained oscilloscope recordings of the excitation force and output voltage
of energy harvesting modules at different modes and conditionsof mechanical excitation. After this, a comparison of the simulation and experimental results is made.",
publisher = "IEEE",
journal = "22nd International Symposium INFOTEH-JAHORINA",
title = "Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films",
doi = "10.1109/INFOTEH57020.2023.10094150"
}

Despotovic, Z. V., Vijatović Petrović, M., Bobić, J., Džunuzović, A.,& MERCADELLI, E.. (2023). Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films. in 22nd International Symposium INFOTEH-JAHORINA
IEEE..
https://doi.org/10.1109/INFOTEH57020.2023.10094150

Despotovic ZV, Vijatović Petrović M, Bobić J, Džunuzović A, MERCADELLI E. Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films. in 22nd International Symposium INFOTEH-JAHORINA. 2023;.
doi:10.1109/INFOTEH57020.2023.10094150 .

Despotovic, Zeljko V., Vijatović Petrović, Mirjana, Bobić, Jelena, Džunuzović, Adis, MERCADELLI, ELISA, "Experimental Setup for Testing Low Energy Harvesting Devices Based on Lead-Free NBT-BTPVDF Composite Flexible Films" in 22nd International Symposium INFOTEH-JAHORINA (2023),
https://doi.org/10.1109/INFOTEH57020.2023.10094150 . .