Ferroelectric Polymer-ceramic Nanoparticle Composite Films for Use in the Capacitive Storage of Electrical Energy
- PDF / 281,103 Bytes
- 6 Pages / 612 x 792 pts (letter) Page_size
- 84 Downloads / 209 Views
1269-FF05-01
Ferroelectric Polymer-Ceramic Nanoparticle Composite Films for Use in the Capacitive Storage of Electrical Energy
Timothy L Porter, Randy Dillingham, David Cornelison, Dana Parsons, Andy Pierce Northern Arizona University, Department of Physics and Astronomy, Flagstaff, AZ 86011
ABSTRACT In this study, we use novel thermal deposition techniques to synthesize films of poly(vinlyidene fluoride), or PVDF, containing nanoparticles of the ceramic titanium dioxide (TiO2). This ferroelectric polymer has shown promise as a capacitor dielectric material, and possible enhanced electrical properties when combined with ceramic nanoparticles. Characterization of these composite films has been performed including chemical structure and microstructure using SFM, XPS, and EDS techniques. Measurements of film parameters such as dielectric constant and breakdown voltage have also been performed, and the dispersion of the ceramic particles within the films has been characterized
INTRODUCTION The temporary storage of electrical energy produced from intermittent sources such as solar cells, thermal solar, wind or other means is an important component of any strategy to use these energy sources as a stable, long-term and reliable source of energy production [1]. Energy storage solutions coupled to the intermittent production of electricity may ultimately consist of large-scale farms incorporating massive, centralized storage units based on chemical, thermal, physical or other storage technologies. Other means of deploying energy storage units may be based on micro-grid technologies, using smaller-scale “micro-storage” units. Desired attributes of these micro-storage units would include high energy storage density, flexible and rapid delivery of power, low cost, low weight, low power loss, and environmentally safe components. In addition to the more well-known battery storage technologies available for microgrids, capacitive storage also possesses many of the features that are desirable for storage of electric energy. Capacitor materials exhibiting high dielectric permittivity and breakdown strength, as well as being light weight and environmentally safe are most desirable. Recently, new classes of capacitor dielectric materials, consisting of polymer[2] or ferroelectric polymer matrices containing ceramic nanoparticles have attracted renewed interest owing to their high
potential energy storage, charge and discharge properties and light weight [3-4]. Many areas need to be addressed, however, with these composite systems [5]. Dispersion of the nanoparticles within the polymer matrices must be enhanced and controlled so that severe clumping of the particles is reduced. Deposition parameters such as temperature and pressure and their effect of the film chemistry and morphology must also be studied.
EXPERIMENTAL Titanium Dioxide was obtained from Nanostructured and Amorphous Materials, Inc. The particles used were 10 nm anatase particles, 99% purity. PVDF was obtained from the Eastman laboratory at UTEP. The PVDF was firs
Data Loading...
