20.500.12556/RUL-152369 Multifunctional flexible ferroelectric thick-film structures with energy storage, piezoelectric and electrocaloric performance 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(Mg$_{1/3}$Nb$_{2/3}$)O$_3$– 0.35PbTiO$_3$ (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 cm$^{–3}$. 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 10$^5$ repeated bending cycles. The developed thick-film structures also exhibit a piezoelectric coefficient d$_{33}$ of ∼80 pm V$^{–1}$. 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 °C and 300 kV cm$^{–1}$, which exceeds the value of 0.72 K at ∼65 °C and 60 kV cm$^{–1}$ 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. energy management energy self-sufficiency energija tajnostno upravljanje shranjevanje pretvorba materiali preiskave true false true Angleški jezik Slovenski jezik Članek v reviji 2023-11-22 15:53:10 2023-11-22 15:53:14 2023-11-23 09:16:18 0000-00-00 00:00:00 2023 0 0 Str. 10058-10068 iss. 29 Vol. 11 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 666.65 2050-7534 10.1039/d3tc01555f 160044035 d3tc01555f.pdf d3tc01555f.pdf 1 7EB52F4740B5CF17CAC372416F006A2D db0348be209fe5957e49d06e755a261cc9f9a838ee895177f52757576b7365bc 206c529f-8947-11ee-916c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=177858 https://pubs.rsc.org/en/content/articlelanding/2023/TC/D3TC01555F 0 0e570d0c-8947-11ee-916c-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=177857 Fakulteta za strojništvo Zdravstvena fakulteta 0 0 0