PVDF-novel double perovskite (Nd2MnFeO6) organic-inorganic nano-composite membrane: for flexible energy storage devices

Polymer-ceramic nanocomposite films using double perovskite ceramic phase offer promising prospects for developing multifunctional flexible films in general and energy storage system in specific. The manganese and iron-based double perovskite is emerging as potential system for various functional applications. In the present attempt, we explore the application of poly (vinylidene fluoride) (PVDF):Nd2MnFeO6 (NMFO) composite films as an energy storage system. The NMFO was synthesized by sol-gel combustion method, and its structure is confirmed by X-ray diffraction (XRD) analysis, which demonstrates the formation of a single-phase monoclinic system with the space group P-21/n. Detailed structural information is extracted through Rietveld refinement of XRD data using full-prof software. To create flexible nanocomposite films, various volume percentages (10%, 20%, 30%, 40%, and 50%) of NMFO ceramic nanoparticles are incorporated as fillers in the PVDF polymer matrix using the solution casting method. The structural properties of the developed nanocomposite films are investigated using XRD and FTIR studies, while microstructural features are investigated through SEM analysis. Dielectric properties of nanocomposite thin film are studied at different frequency ranges (1-200 kHz) using a LCR meter. Furthermore, the ferroelectric behavior of the nanocomposite thin film was systematically examined using a PE Loop Tracer. Remarkably, the nanocomposite thin film containing approximately 30 wt% of NMFO exhibited significantly higher dielectric permittivity, low dielectric loss, and increased remanent polarization, coercivity, and spontaneous polarization at room temperature. These findings highlight the potential of this nanocomposite film as a flexible energy storage system.