The effect of spherical filled particles on the energy storage density of composite materials

Abstract

Abstract As one of the popular directions of new energy storage technology, dielectric energy storage technology has a wide application demand and market prospect in the modern new energy field. The research and manufacturing of composite materials is a core technology for the development of energy storage. In particle-filled composites, different filler particles can change a range of electromagnetic parameters of the composite, which can have an impact on the energy storage density of the composite. This paper presents an analytical study on the effect of spherical filled particles in composites on energy storage density. It turns out that when the volume ratio of filled particles is certain, as the permittivity of the filled particles increases, the energy storage density of the composite increases. When increased to a certain range, a limit value is reached. Therefore, under the condition of a certain volume ratio, it is not always possible to optimize the electrical energy storage density by changing the dielectric constant of spherically filled particles only.