Are mica films magnetron sputtered by different insulating layers good for energy storage?

However, conduction losses rise sharply at elevated temperature, limiting the application of energy storage capacitors. Here, the mica films magnetron sputtered by different insulating layers are specifically investigated, which exhibit the excellent high-temperature energy storage performance.

Can mica be used as energy storage dielectrics?

In recent years, mica has a tendency to be used as energy storage dielectrics. As shown in Figure S1, compared with other thicknesses, mica with a thickness of 10 µm has the most excellent energy storage performance at high temperature.

Which mica thickness is best for energy storage?

As shown in Figure S1, compared with other thicknesses, mica with a thickness of 10 µm has the most excellent energy storage performance at high temperature. On the one hand, mica stripped to 10 µm can show good flexibility and work stably for a long time at 1100°C.

How to suppress high-temperature conduction loss of mica?

In order to further suppress the high-temperature conduction loss of mica, the effective process is growing interface functional insulating layers on the surface to suppress charge injection at the electrodes.

What are the EB values of mica and papmpap composite films?

The Eb of mica, PMP, PAMAP, and PAPMPAP composite films are 588.3, 665.7, 697.6, and 712.1 MV/m, and the β values are 4.7, 19.5, 16.6, and 15.1 respectively. By constructing the interface insulating layers, the high-temperature breakdown performances of the composite films are substantially improved.

Do mica films have structural defects?

To further characterize the microstructure of the films, Figure S6 shows the cross-sectional scanning electron microscopy (SEM) images of films, no structural defects can be found in the mica films.