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  • Multifunctional flexible ferroelectric thick-film structures with energy storage, piezoelectric and electrocaloric performance [Elektronski vir]
    Šadl, Matej, (materiali) ...
    As a major challenge, sustainable energy management and energy self-sufficiency require microsystems that manage multiple energy operations in a single device. In this work, flexible thick-film ... structures with promising energy storage and electrocaloric cooling capabilities as well as piezoelectric properties are developed. The functional thick-film layer is based on relaxor-ferroelectric 0.65Pb(Mg1/3Nb2/3)O3– 0.35PbTiO3 (PMN–35PT) directly deposited on a flexible polyimide substrate by an aerosol deposition method. The thick-film structures exhibit a promising recoverable energy-storage density of 10.3 J cm3 . After extensive bending tests, the structures showed no signs of degradation. The high bendability and durability are confirmed by stable energy storage properties after bending up to a radius of 1.5 mm (2.4% bending strain) and 105 repeated bending cycles. The developed thick-film structures also exhibit a piezoelectric coefficient d33 of B80 pm V1 . Using two direct electrocaloric measurement methods, we demonstrated that the electrocaloric temperature change in the prepared PMN–35PT thick-film structures reaches a maximum of 0.87 K at 63.5 1C and 300 kV cm1 , which exceeds the value of 0.72 K at B65 1C and 60 kV cm1 reported for bulk ceramics of the same composition. The PMN–35PT thick films prepared here are thick-film structures with excellent flexibility, promising for future multifunctional microsystems that manage multiple energy operations, enabling comprehensive energy harvesting, storage and conversion to thermal energy
    Vir: Journal of materials chemistry. C, Materials for optical and electronic devices [Elektronski vir]. - ISSN 2050-7534 (11, 2023, str. 10058-10068)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 160044035

    Povezava(-e):

    https://pubs.rsc.org/en/content/articlehtml/2023/TC/D3TC01555F
    Repozitorij Univerze v Ljubljani – RUL
    DOI

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