N. Pradhan
Jackson State University,
United States
Summary:
High-energy-density electrochemical storage devices such as lithium-ion batteries and supercapacitors play a major role in modern electronics and automobiles. These devices store energy through electrochemical process using chemicals or electrolytes. On the other hand, dielectric polymer capacitors store the charges through electrostatically in dielectric medium, but their application is limited due to low storage energy densities compared to the Li-ion battery and supercapacitors. Polymer nanocomposites based on 2D nanofillers have superior capacitive energy densities, higher thermal stabilities, and higher mechanical strength as compared to the pristine polymers, but realizing their hypothetical gains has proved challenging. Introduction of nanofillers in a traditional dispersion method often leads to reduction in breakdown strength at higher concentration of fillers. In this talk I will introduce new methods of introducing 2D nanofillers in the dielectric polymer hosts to boost the energy density and efficiency of thin film based dielectric capacitors. Several 2D nanofillers based polymer composites such as Mica, h-BN and MXene will be discussed which provides high discharge energy density and record efficiency in micro-capacitor-based devices. In addition, pristine 2D dielectric materials will also be discussed could have promising applications in developing high-density energy storage devices for portable electronics to space and defense technology.