High-temperature dielectric polymers with tailored structural units

The rapid expansion of renewable energy, electrified transportation and advanced electromagnetic power systems requires electronic devices that can operate stably at harsh temperatures (e.g., 150 to 250 °C). However, as one of the critical components of electronic devices and power systems, film capacitors can currently only operate at temperatures below 105 °C because conventional polymer dielectric materials suffer from high conduction loss at high temperature and high electric field, resulting in severe heat accumulation and thermal runaway of film capacitors.