High dielectric constant (high-?) materials have drawn intensive research attention due to their important applications in modern nanoelectronics including capacitors, memories, transistors and communication devices. Ferroelectric ceramics, like barium titanate (BaTiO3) exhibiting perovskite crystal structure, show promise as high dielectric materials for enhanced performance in supercapacitor composite electrodes. While aiming at higher capacitance and energy density, it is necessary to combine the mutual benefits achieved with a high permittivity insulator material and an increased effective surface area. As an important one-dimensional nanomaterial, electrospun nanofibers with their large surface-to-volume ratio, have the potential in improving the capacitance performance and energy density in electrical storage capacitors or supercapacitors. Solutions of barium acetate, titanium isopropoxide, and polyvinylpyrrolidone (PVP) offered a vehicle to produce a uniform and homogenous sol-gel for electrospinning to generate polymer nanofibers. After drying and heat treatment of polymer nanofibers under air atmosphere, barium titanate nanofibers with folded surface morphology assumed tetragonal geometry with perovskite crystal structure. The synthesis process, analytical measurement, mechanistic study, and application of this class of electrospun nanofibers in supercapacitors will be discussed.

Perovskite barium titanate electrospun nanofiber synthesis for supercapacitor composite electrodes

247th National Meeting (2014)

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