A review on boron nitride reinforced polyimide-based nanocomposites for high-temperature capacitive energy storage: Challenges and recommendations

The adoption of polyimide-based materials for high temperature related applications is receiving increased attention from the research community, particularly for high-temperature capacitive energy storage. Polyimide matrix material has illustrated its effectiveness in the design and manufacturing of polymer-based dielectric capacitors, owing to its intrinsic characteristics. However, in modifying the structure and characteristics of polyimide-based matrix material for its widespread high-temperature dielectric capacitive applications using inorganic filler. The present study reviewed the recent advances on the enhancement of polyimide-based nanocomposite properties using boron nitride fillers for high-temperature energy storage. From the reviewed literature, it is worth noting that boron nitride fillers remain promising on improving the dielectric, breakdown strength, thermal conductivity, and thermal stability response of polyimide nanocomposites favourable for high-temperature dielectric capacitors and application. Additionally, the energy storage density and charge-discharge efficiency of the boron nitride-reinforced polyimide nanocomposites in relation to breakdown strength and thermal conductivity were thoroughly discussed. In conclusion, the current challenges, which are associated with the fabrication and characterization of boron nitride-reinforced polyimide nanocomposites for high-temperature energy storage were presented, as well as recommendation for future research directions for this developing field.