Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure
This paper presents the electrical characterization of a flexible supercapacitor with a unique architecture incorporating a piezoelectric PVDF-TrFE film sandwiched between PEDOT:PSS:Graphene and LiTaO<sub>3</sub> as a charge-generating and charge-transferring layer. Impedance spectroscop...
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MDPI AG
2025-07-01
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| Online Access: | https://www.mdpi.com/2073-4352/15/7/660 |
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| author | Mariya Aleksandrova Ivaylo Pandiev |
| author_facet | Mariya Aleksandrova Ivaylo Pandiev |
| author_sort | Mariya Aleksandrova |
| collection | DOAJ |
| description | This paper presents the electrical characterization of a flexible supercapacitor with a unique architecture incorporating a piezoelectric PVDF-TrFE film sandwiched between PEDOT:PSS:Graphene and LiTaO<sub>3</sub> as a charge-generating and charge-transferring layer. Impedance spectroscopy measurements reveal frequency-dependent capacitance behavior, reflecting the contributions of both piezoelectric and supercapacitor capacitances. Charge–discharge cycling tests demonstrate the device’s energy storage capabilities and indicate a potential enhancement through the piezoelectric effect. Supercapacitor cycling tests demonstrate the device’s energy storage capabilities, with an estimated specific capacitance of 10.14 F/g, a power density of 16.3 W/g, an energy density of 5.63 Wh/kg, and a Coulombic efficiency of 96.1% from an active area of 1 cm<sup>2</sup>. The proposed structure can serve as an independent harvester and storage for low-power, wearable sensors. |
| format | Article |
| id | doaj-art-3cc6e6c9a00a4c0ab7a5f61276d86bb2 |
| institution | DOAJ |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Crystals |
| spelling | doaj-art-3cc6e6c9a00a4c0ab7a5f61276d86bb22025-08-20T03:07:57ZengMDPI AGCrystals2073-43522025-07-0115766010.3390/cryst15070660Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al StructureMariya Aleksandrova0Ivaylo Pandiev1Department of Microelectronics, Faculty of Electronic Engineering and Technology, Technical University of Sofia, Kliment Ohridski Blvd., 8, 1000 Sofia, BulgariaDepartment of Electronics, Faculty of Electronic Engineering and Technologies (FEET), Technical University of Sofia, Kliment Ohridski Blvd., 8, 1000 Sofia, BulgariaThis paper presents the electrical characterization of a flexible supercapacitor with a unique architecture incorporating a piezoelectric PVDF-TrFE film sandwiched between PEDOT:PSS:Graphene and LiTaO<sub>3</sub> as a charge-generating and charge-transferring layer. Impedance spectroscopy measurements reveal frequency-dependent capacitance behavior, reflecting the contributions of both piezoelectric and supercapacitor capacitances. Charge–discharge cycling tests demonstrate the device’s energy storage capabilities and indicate a potential enhancement through the piezoelectric effect. Supercapacitor cycling tests demonstrate the device’s energy storage capabilities, with an estimated specific capacitance of 10.14 F/g, a power density of 16.3 W/g, an energy density of 5.63 Wh/kg, and a Coulombic efficiency of 96.1% from an active area of 1 cm<sup>2</sup>. The proposed structure can serve as an independent harvester and storage for low-power, wearable sensors.https://www.mdpi.com/2073-4352/15/7/660supercapacitorslithium tantalateflexible substratessignal processingtesting |
| spellingShingle | Mariya Aleksandrova Ivaylo Pandiev Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure Crystals supercapacitors lithium tantalate flexible substrates signal processing testing |
| title | Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure |
| title_full | Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure |
| title_fullStr | Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure |
| title_full_unstemmed | Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure |
| title_short | Electrical Characterization of a Novel Piezoelectric-Enhanced Supercapacitor with a PET/ITO/PVDF-Tr-FE/PEDOT:PSS:Graphene/LiTaO<sub>3</sub>/Al Structure |
| title_sort | electrical characterization of a novel piezoelectric enhanced supercapacitor with a pet ito pvdf tr fe pedot pss graphene litao sub 3 sub al structure |
| topic | supercapacitors lithium tantalate flexible substrates signal processing testing |
| url | https://www.mdpi.com/2073-4352/15/7/660 |
| work_keys_str_mv | AT mariyaaleksandrova electricalcharacterizationofanovelpiezoelectricenhancedsupercapacitorwithapetitopvdftrfepedotpssgraphenelitaosub3subalstructure AT ivaylopandiev electricalcharacterizationofanovelpiezoelectricenhancedsupercapacitorwithapetitopvdftrfepedotpssgraphenelitaosub3subalstructure |