Reinforced Via the Insulative Boric Oxide in the Batio3 Amorphous Glass Composite Thin Film with High Energy Storage Capability and Stability

Dielectric film capacitors are considered to a potential candidate for advanced power electronics technology due to their fast charging and discharging rate and stability, but the further improvement of energy storage density is still needed. A reasonable amorphous glass structure is applied to the preparation of dielectric film capacitors to improve the dielectric and energy storage properties. The high breakdown strength and energy storage density in the amorphous film are assigned by the disordered structure and intrinsic high insulative for B2O3. Results shown that, high discharge energy storage density of 68.64J cm-3 and efficiency of 85% can be achieved in the BaTiO3-5wt%B2O3 amorphous glass composite thin film at 7.3MV cm-1. And the excellent thermal stability (20-200oC) and cyclic stability (up to 105 times) are obtained in the BaTiO3-B2O3 amorphous glass composite film. This work provides a new method achieve high energy storage density and stability