Polymer dielectric films exhibiting superior high-temperature capacitive performance by utilizing an inorganic...

Area of Science:

• Materials Science
• Electrical Engineering
• Polymer Science

Background:

• Next-generation electrical power equipment and microelectronics require dielectric capacitor films for extreme conditions.
• Elevated temperatures cause increased electrical conduction and decreased breakdown strength in conventional dielectric films.

Purpose of the Study:

• To develop a facile method for enhancing high-temperature capacitive performance of dielectric films.
• To investigate the impact of an inorganic insulation interlayer on energy storage capabilities at elevated temperatures.

Main Methods:

• Fabrication of dielectric capacitor films with an integrated inorganic insulation interlayer.
• Experimental characterization of discharge energy density and efficiency at 150 °C.
• Computational simulations to elucidate the underlying mechanisms of performance improvement.

Main Results:

• The proposed method achieved a discharged energy density of 4.13 J cm⁻³ with over 90% efficiency at 150 °C.
• Performance surpasses state-of-the-art dielectric polymers under high-temperature conditions.
• Inorganic interlayer effectively reduces leakage current and maintains breakdown strength.

Conclusions:

• The inorganic insulation interlayer significantly enhances high-temperature capacitive performance.
• Blocking effects of the interlayer are key to improved energy storage and dielectric strength.
• This approach offers a promising strategy for developing high-performance dielectric films for extreme environments.