Multilayered dielectric composites for high temperature applications

A composition comprising:

• a first layer comprising a polymer and an insulating inorganic filler;
• a second layer comprising the polymer and a polarizing inorganic filler;
• and
• a third layer comprising a same or substantially similar composition to the first layer or the second layer;
• wherein the polymer has a glass transition temperature or a degradation temperature of about or greater than about 150° C.;
• and
• wherein the composition has a discharged energy density of about or greater than 0.6 J cm−3, a charge-discharge efficiency of about or greater than 75%, and a dielectric constant of about or greater than 4, over a temperature range of about 20° C. to about 150° C. and with an applied alternating electric field having a frequency ranging from about 100 Hz to about 1 MHz, and a maximum operating electric field strength of at least 200 megavolt per meter.