Flexible energy-storage ceramic thick-film structures with high flexural fatigue enduranceŠadl, Matej (Avtor) Lebar, Andrej (Avtor) Valentinčič, Joško (Avtor) Uršič Nemevšek, Hana (Avtor) flexible electronicsceramic thick filmsenergy storageaerosol deposition methodpolyimide substraterelaxor-ferroelectricsceramicsdepositionelectric fieldsgranular materialsthin filmsWhen developing flexible electronic devices, trade-offs between desired functional properties and sufficient mechanical flexibility must often be considered. The integration of functional ceramics on flexible materials is a major challenge. However, aerosol deposition (AD), a room-temperature deposition method, has gained a reputation for its ability to combine ceramics with polymers previously considered incompatible with the conventional high-temperature sintering process. In this work, 0.9Pb(Mg$_{1/3}$Nb$_{2/3}$)O$_3$−0.1PbTiO$_3$ (PMN−10PT) thick films were deposited directly on a polyimide substrate using the AD method. As a result, dense and flexible relaxor-ferroelectric thick films were produced by a one-step direct-integration, suitable for large-scale production. After annealing of as-deposited PMN−10PT films at 400 °C, stress-relaxation occurs, which is responsible for the development of a relaxor-ferroelectric character. Achieved high polarization (38 μC·cm$^{−2}$), high dielectric breakdown strength (∼1000 kV·cm$^{−1}$), and low hysteresis losses lead to improved recoverable energy density and energy-storage efficiency of the annealed thick films, reaching 10 J·cm$^{−3}$ and 73% (at 1000 kV·cm$^{−1}$), respectively. The thick films were subjected to flexural bending tests, which showed high flexibility (1.1% bending strain) and high durability (10$^5$ bending cycles). This stable energy-storage operation makes ceramic-polymer layered structures promising for integration into a wide range of flexible electronic devices.20222022-09-16 13:05:31Članek v reviji140633UDK: 620.1/.2:544.6ISSN pri članku: 2574-0962DOI: 10.1021/acsaem.2c00518COBISS_ID: 110882307sl