Lead titanate nanowires/polyamide-imide piezoelectric nanocomposites for high-temperature energy harvesting

With an increasing demand for self-powered microelectronics to be used in scientific tasks and exploration missions extreme environments, the implementation of piezoelectric energy harvesting at high temperature is important research focus renewable sources. Piezoelectric composites made from ceramic fillers polymer matrices combine electromechanical coupling with flexibility, resulting a versatile candidate harvesting. In this research, nanocomposite formed by lead titanate nanowires (PbTiO3 NWs) polyamide-imide (PAI) matrix developed shown have excellent response temperatures. By situ measurements g31 d31 coefficients films different PbTiO3 NW weight fractions range 25–250 °C, dependence filler concentration on properties are fully characterized. addition, effect alignment through direct ink writing also studied. Finally, bending-mode harvester demonstrated generate maximum power density 33 μW·m−2 resonance 20 under low-frequency random excitation 200 while keeping long operating life least 100 h. conclusion, work provides new solution high-temperature vibrations using PbTiO3/PAI nanocomposites.