Significant dielectric energy storage enhancement in layered polymer films with heterogeneous carbon/silica nanospheres

The HCS nanospheres are incorporated into P(VDF-HFP) and subsequently stacked with PEI. The synergistic effect between the high- ε r HCS/P(VDF-HFP) layer and high- E b PEI layer results in a high U d of 10.81 J cm −3 and a high efficiency of 93.8%.