The development of advanced dielectric materials with high electric energy densities at elevated temperatures is of crucial importance in modern electronics and electric power systems. Herein, poly(methyl methacrylate) (PMMA)/boron nitride nanosheets (BNNS) nanocomposites for high temperature applications were prepared using a facile solution cast method. It was found the incorporation of BNNS into PMMA increased the thermal conductivity and enhanced the capacitive properties of the nanocomposites. A discharged energy density that is over 210% that of the state-of-the-art biaxially oriented polypropylene (BOPP) and a charge-discharge efficiency of more than 97% have been achieved in PMMA/BNNS under an electric field of 200 MV/m at 70 °C. The incorporation of uniformly dispersed nanosheets into polymer matrix as charge-blocking barrier paves a way to significant reduction of conduction loss in high temperature dielectrics.
All Science Journal Classification (ASJC) codes
- Ceramics and Composites