High energy storage capacitance of defluorinated polyvinylidene fluoride and polyvinylidene fluoride blend alloy for capacitor applications

With the development of high energy density and high dielectric materials, the potential applications in modern microelectronics and power systems are receiving more and more attention. It has been found herein that the elimination reaction can occur by placing polyvinylidene fluoride (PVDF) in an aqueous solution of polyvinylpyrrolidone (PVP) and potassium hydroxide. Moreover, the combination of dehydrofluorinated polyvinylidene fluoride (MD-PVDF) and untreated PVDF can efficiently increase the dielectric constant and the storage density. When the content of MD-PVDF reaches 5%, the storage density is the largest, that is, at the field strength of 400 MV m(-1), the storage density can reach 12 J cm(-3). This work provides a novel approach to improve the energy storage performance of polymer dielectrics.