Document Type
Article
Publication Date
Summer 7-25-2025
Abstract
This study introduces the development of multifunctional electrospun polyvinylidene fluoride (PVDF) composite films doped with potassium octatitanate (KTO) for advanced energy applications. The research tackles key challenges in energy generation and storage through innovative material design and detailed characterization. Adding 0.2 wt% KTO to PVDF electrospun fibers resulted in a notable increase in crystallinity to 78.51 %, marking a significant enhancement in material properties. Structural analysis using X-ray diffraction and Fourier transform infrared spectroscopy confirmed optimal phase composition, while morphological features were verified through field emission scanning electron microscopy. The composite films showed exceptional electrochemical performance, with bulk electrolyte resistance (Rbe) values of 0.4–1.4 Ω, much lower than commercial separators such as Celgard ™ 2500 (88.2 Ω) and Celgard Ez 2090 (47.1 Ω). Cyclic voltammetry at scan rates of 20–180 mV/s demonstrated excellent rate performance with stable curve shape, indicating superior ion transport. Electrochemical impedance spectroscopy also confirmed stable conductivity over 100 cycles, showing long-term reliability. Furthermore, when subjected to mechanical stress, the engineered films generated an impressive output voltage of 8.902 V, highlighting significant piezoelectric potential. Ferroelectric hysteresis loop analysis supported energy storage efficiency, while dielectric constant and impedance measurements confirmed improved electrical properties upon doping. The composite films also exhibited high-performance UV photodetection in organic/inorganic heterojunction structures. Evaluations of responsivity, detectivity, and rise/fall times indicated fast response features suitable for advanced optoelectronic devices. Overall, this work presents a new approach to creating cost-effective, multifunctional electroactive materials that address energy generation, storage, and sensing needs simultaneously. Their superior performance compared to commercial options, together with their versatility across various energy sectors, makes these PVDF/KTO composite films promising candidates for next-generation energy systems and smart electronics.
Recommended Citation
Ramzy, Ahmed; Electrochemistry and Corrosion Laboratory, Physical Chemistry Department, National Research Centre, Dokki, Cairo, 12622, Egypt; and El-Mahalawy, Ahmed M., "Preparation and characterization of electrospun PVDF-based nanocomposite fibers for energy harvesting and storage applications" (2025). Nanotechnology Research Centre. 226.
https://buescholar.bue.edu.eg/nanotech_research_centre/226