Transparent, flexible and efficient ferroelectric composite films were fabricated by a simple ultrasonication approach followed by thermal treatment. The enhanced electroactive β‐phase and stabilization of the ferroelectric poly(vinylidene fluoride) (PVDF) polymer were analyzed by the substitution of various cations with different oxidation states (Li¹⁺, Al³⁺) as fillers. The electroactive β‐phase was obtained due to the stretching of −CH₂−/−CF₂− molecular chains, stress‐induced effects during the sonication process and the interfacial interaction between the molecular chains and the surface charge of foreign elements. Further, a flexible ferroelectric nanogenerator was implemented and subjected to harness the waste biomechanical energy. The PVDF/Al³⁺ composite film‐based device gave the maximum amount of voltage and current of 189 V and 0.97 μA respectively at 2 N force. This high electrical output is caused by the electrostatic interaction between electronegative fluorine atoms and the surface active, positive charged ions of the fillers. The obtained maximum instantaneous power density of the FF‐CNG device at 20 MΩ load resistance is 1.92 mW/m². The generated output is used to power up commercial light‐emitting diodes and display devices without using storage components. The proposed approach for enhancing the throughput of ferroelectric polymers can pave the way to develop new smart composite films for efficient energy conversion.

中文翻译：

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阳离子氧化态对增强聚偏二氟乙烯电活性β相的作用及其能量收集性能

通过简单的超声方法，然后进行热处理，制造出透明，灵活且高效的铁电复合膜。通过取代具有不同氧化态（Li ¹⁺，Al ³⁺）的各种阳离子来分析铁电聚偏二氟乙烯（PVDF）聚合物的增强的电活性β相和稳定性。由于-CH ₂ -/-CF ₂的拉伸，获得了电活性β-相−分子链，超声处理过程中的应力诱导效应以及分子链与异物表面电荷之间的界面相互作用。此外，实现了柔性铁电纳米发电机，并利用了其浪费的生物机械能。基于PVDF / Al ³⁺复合薄膜的器件在2 N力下的最​​大电压和电流分别为189 V和0.97μA。这种高电输出是由负电性氟原子与填料的表面活性，带正电的离子之间的静电相互作用引起的。FF-CNG器件在20MΩ负载电阻下获得的最大瞬时功率密度为1.92 mW / m ²。生成的输出用于为商用发光二极管和显示设备供电，而无需使用存储组件。所提出的提高铁电聚合物的生产能力的方法可以为开发新的智能复合膜以进行有效的能量转化铺平道路。