Polyvinylidene Fluoride ( <scp>PVDF</scp> )‐Based Composite for Energy and Environmental Applications: A Comprehensive Review

ABSTRACT Due to their distinctive physical and chemical properties, polyvinylidene fluoride (PVDF)‐based composites exhibit promising application potential in modern energy and environmental technologies. They have emerged as one of the core systems addressing key challenges in high‐performance functional materials. This article reviews recent research progress in PVDF‐based composites, centering on their design principles, performance optimization strategies and diverse applications in energy and environmental aspects. This review provides an introductory foundation by outlining the core mechanisms responsible for the dielectric, piezoelectric, and ferroelectric properties of PVDF‐based materials, alongside key material design strategies. These strategies encompass the selection and functionalization of diverse fillers, as well as the modulation of the polymer matrix's molecular structure to enhance functional performance. Special emphasis is placed on analyzing the mechanisms and methods for performance optimization through interfacial engineering, multiscale structural design and functional synergy. Furthermore, typical processing techniques (e.g., solution casting, melt blending) and typical energy/environmental applications (e.g., high‐energy‐density capacitors, water treatment membranes) of these composites are reviewed. Finally, the main existing challenges are prospected. This review offers theoretical and technical guidance for designing and applying high‐performance PVDF‐based composites.