For this purpose, twelve working groups from the fields of materials and geosciences, chemistry as well as electrical engineering and information technology work together to develop new lead-free antiferroelectrics for energy storage devices and isolators.
Antiferroelectric materials enable the design of high energy and power density capacitors in common DC/ AC voltage inverters, and vice versa in electric drives, as well as in renewable power generation. As a result of their field-dependent permittivity, antiferroelectric materials can additionally be used in the insulation system as field control material in high-voltage insulators.
The scientific goal of the Fermi level Engineering is to fully understand the relation between the electronic structure of a material and respectively its corresponding properties, furthermore to convey design principles for developing new materials with a specifically set function. Accordingly, the sub-project E: “Components & Properties” of the LOEWE focus “FLAME” characterizes the specific properties of capacitors with antiferro electrical dielectrics . Therefore composite insulators based on epoxy / silicone resins are produced and characterized. The modeling and optimization of the electric field distribution in antiferroelectric composite insulators is supported by FEM simulation. Furthermore, the long-term stability of these composite insulators and capacitors is investigated by means of electrothermal aging.