The lead-free Na0.5K0.5NbO3-Poly(vinylidene fluoride-trifluoroethylene) (KNN-P(VDF-TrFE)) composite films were prepared by sol-spin coating method. The KNN film was annealed at 700 °C for 3 min with the P(VDF-TrFE) film annealed then at 160 °C for 2 h. The ferroelectric and energy storage properties of composite films were also investigated. The energy storage density of the composite films reached 7.58 J/cm3, and the efficiency was 52%. In addition, the KNN-P(VDF-TrFE) composite films showed weak leakage behavior.
The P(VDF-TrFE) (Poly(vinylidene fluoride-trifluoroethylene)) films were annealed at different temperatures and characterized by Integrated Ferroelectric Measurement System and then get the storage density of 3.30 J/cm3 at the η = 33%.
The 2-2 KNN-P(VDF-TrFE) composite films were prepared to get high energy storage density for the first time.
The ferroelectric and energy storage performance of KNN-P(VDF-TrFE) composite films were studied and the storage density can reach 7.58 J/cm3 at the η = 52%.
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This work was financially supported by the National Natural Science Foundation of China (Grant No. 51372055, 51621091).
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Liu, Y., Diao, Z., Zhao, C. et al. Energy storage performance of Na0.5K0.5NbO3-P(VDF-TrFE) lead-free composite films. J Sol-Gel Sci Technol 93, 608–614 (2020). https://doi.org/10.1007/s10971-019-05105-0
- Energy storage
- Poly(vinylidene fluoride-trifluoroethylene)(P(VDF-TrFE))
- Composite films