Composite flexible films prepared by hot pressing for low-energy harvesting and storage
Аутори
Vijatović Petrović, MirjanaCraciun, Floriana
Cordero, Francesco
MERCADELLI, ELISA
Galassi, Carmen
Ilić, Nikola
Brunengo, Elisabetta
Despotovic, Zeljko V.
Bobić, Jelena
Džunuzović, Adis
Stagnaro, Paola
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The important task of scientific community nowadays is finding the way to use enormous
amount of mechanical energy released everywhere around us as a renewable and safe energy
source.
This research was focused on the preparation of flexible composite films, by combining a
highly flexible polyvinylidene fluoride (PVDF) polymer matrix with lead-free piezoelectric
perovskites, 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (NBT-BT), in different ratios, using the hot
pressing method. A crucial point of this investigation is to show that this material is quite
versatile and possesses functional properties which are sensitive to both microscopic and
chemical modifications.
Detailed investigation of processed flexible films led to the main conclusion that
electrical properties of these composites can be affected by different factors. Firstly, the hotpressing
method itself induces the formation of electroactive β-phase of PVDF polymer, the
NBT-BT as filler with negatively charged surface enabl...es a predominant formation of desirable
piezoelectric PVDF phase as well and additionally, there is an influence of concentration and
type (pre-preparation method) of the added filler.
Dielectric permittivity values of composites were up to 110 and highly depend on the
filler amount. A very useful zone around room temperature as a plateau with relatively constant
dielectric permittivity and losses was noticed in each film`s dielectric spectra. Anelastic
measurements have shown a complete agreement with dielectric properties in which the
temperature dependence of the Young’s modulus and the losses are dominated by those of the
polymer.
Regarding the resulting dielectric and ferroeletric properties of the flexible composites,
the potential of these materials for the energy storage application was investigated. Energy
density efficiencies obtained for investigated materials have shown a decreasing trend with
increasing amount of filler with values of 66-74 %.
Assembled energy harvesting units were made by proper wiring and covering the flexible
film with Kapton protection layer. The obtained output voltage while applying the impact force
was from 1 V to 7 V, depending on the type of the flexible film.
The main conclusion derived from this study is that composite flexible films made of
lead-free NBT-BT filler and PVDF, have high potential to be used for environmentally safe lowenergy
storage and energy harvesting devices.
Кључне речи:
PVDF / electroactive β-phase / NBT-BT / lead-free piezoelectric perovskites / flexible composite filmsИзвор:
IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021., 2021Издавач:
- IEEE ISAF-ISIF-PFM 2021, Sydney, Australia
Институција/група
Institut za multidisciplinarna istraživanjaTY - CONF AU - Vijatović Petrović, Mirjana AU - Craciun, Floriana AU - Cordero, Francesco AU - MERCADELLI, ELISA AU - Galassi, Carmen AU - Ilić, Nikola AU - Brunengo, Elisabetta AU - Despotovic, Zeljko V. AU - Bobić, Jelena AU - Džunuzović, Adis AU - Stagnaro, Paola PY - 2021 UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/2472 AB - The important task of scientific community nowadays is finding the way to use enormous amount of mechanical energy released everywhere around us as a renewable and safe energy source. This research was focused on the preparation of flexible composite films, by combining a highly flexible polyvinylidene fluoride (PVDF) polymer matrix with lead-free piezoelectric perovskites, 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (NBT-BT), in different ratios, using the hot pressing method. A crucial point of this investigation is to show that this material is quite versatile and possesses functional properties which are sensitive to both microscopic and chemical modifications. Detailed investigation of processed flexible films led to the main conclusion that electrical properties of these composites can be affected by different factors. Firstly, the hotpressing method itself induces the formation of electroactive β-phase of PVDF polymer, the NBT-BT as filler with negatively charged surface enables a predominant formation of desirable piezoelectric PVDF phase as well and additionally, there is an influence of concentration and type (pre-preparation method) of the added filler. Dielectric permittivity values of composites were up to 110 and highly depend on the filler amount. A very useful zone around room temperature as a plateau with relatively constant dielectric permittivity and losses was noticed in each film`s dielectric spectra. Anelastic measurements have shown a complete agreement with dielectric properties in which the temperature dependence of the Young’s modulus and the losses are dominated by those of the polymer. Regarding the resulting dielectric and ferroeletric properties of the flexible composites, the potential of these materials for the energy storage application was investigated. Energy density efficiencies obtained for investigated materials have shown a decreasing trend with increasing amount of filler with values of 66-74 %. Assembled energy harvesting units were made by proper wiring and covering the flexible film with Kapton protection layer. The obtained output voltage while applying the impact force was from 1 V to 7 V, depending on the type of the flexible film. The main conclusion derived from this study is that composite flexible films made of lead-free NBT-BT filler and PVDF, have high potential to be used for environmentally safe lowenergy storage and energy harvesting devices. PB - IEEE ISAF-ISIF-PFM 2021, Sydney, Australia C3 - IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021. T1 - Composite flexible films prepared by hot pressing for low-energy harvesting and storage UR - https://hdl.handle.net/21.15107/rcub_rimsi_2472 ER -
@conference{ author = "Vijatović Petrović, Mirjana and Craciun, Floriana and Cordero, Francesco and MERCADELLI, ELISA and Galassi, Carmen and Ilić, Nikola and Brunengo, Elisabetta and Despotovic, Zeljko V. and Bobić, Jelena and Džunuzović, Adis and Stagnaro, Paola", year = "2021", abstract = "The important task of scientific community nowadays is finding the way to use enormous amount of mechanical energy released everywhere around us as a renewable and safe energy source. This research was focused on the preparation of flexible composite films, by combining a highly flexible polyvinylidene fluoride (PVDF) polymer matrix with lead-free piezoelectric perovskites, 0.94[(Bi0.5Na0.5)TiO3]-0.06BaTiO3 (NBT-BT), in different ratios, using the hot pressing method. A crucial point of this investigation is to show that this material is quite versatile and possesses functional properties which are sensitive to both microscopic and chemical modifications. Detailed investigation of processed flexible films led to the main conclusion that electrical properties of these composites can be affected by different factors. Firstly, the hotpressing method itself induces the formation of electroactive β-phase of PVDF polymer, the NBT-BT as filler with negatively charged surface enables a predominant formation of desirable piezoelectric PVDF phase as well and additionally, there is an influence of concentration and type (pre-preparation method) of the added filler. Dielectric permittivity values of composites were up to 110 and highly depend on the filler amount. A very useful zone around room temperature as a plateau with relatively constant dielectric permittivity and losses was noticed in each film`s dielectric spectra. Anelastic measurements have shown a complete agreement with dielectric properties in which the temperature dependence of the Young’s modulus and the losses are dominated by those of the polymer. Regarding the resulting dielectric and ferroeletric properties of the flexible composites, the potential of these materials for the energy storage application was investigated. Energy density efficiencies obtained for investigated materials have shown a decreasing trend with increasing amount of filler with values of 66-74 %. Assembled energy harvesting units were made by proper wiring and covering the flexible film with Kapton protection layer. The obtained output voltage while applying the impact force was from 1 V to 7 V, depending on the type of the flexible film. The main conclusion derived from this study is that composite flexible films made of lead-free NBT-BT filler and PVDF, have high potential to be used for environmentally safe lowenergy storage and energy harvesting devices.", publisher = "IEEE ISAF-ISIF-PFM 2021, Sydney, Australia", journal = "IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.", title = "Composite flexible films prepared by hot pressing for low-energy harvesting and storage", url = "https://hdl.handle.net/21.15107/rcub_rimsi_2472" }
Vijatović Petrović, M., Craciun, F., Cordero, F., MERCADELLI, E., Galassi, C., Ilić, N., Brunengo, E., Despotovic, Z. V., Bobić, J., Džunuzović, A.,& Stagnaro, P.. (2021). Composite flexible films prepared by hot pressing for low-energy harvesting and storage. in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021. IEEE ISAF-ISIF-PFM 2021, Sydney, Australia.. https://hdl.handle.net/21.15107/rcub_rimsi_2472
Vijatović Petrović M, Craciun F, Cordero F, MERCADELLI E, Galassi C, Ilić N, Brunengo E, Despotovic ZV, Bobić J, Džunuzović A, Stagnaro P. Composite flexible films prepared by hot pressing for low-energy harvesting and storage. in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021.. 2021;. https://hdl.handle.net/21.15107/rcub_rimsi_2472 .
Vijatović Petrović, Mirjana, Craciun, Floriana, Cordero, Francesco, MERCADELLI, ELISA, Galassi, Carmen, Ilić, Nikola, Brunengo, Elisabetta, Despotovic, Zeljko V., Bobić, Jelena, Džunuzović, Adis, Stagnaro, Paola, "Composite flexible films prepared by hot pressing for low-energy harvesting and storage" in IEEE ISAF-ISIF-PFM 2021, Sydney, Australia, May 16-21, 2021. (2021), https://hdl.handle.net/21.15107/rcub_rimsi_2472 .