- Researchers have developed a new dielectric capacitor a device that stores energy like a battery, taking inspiration from how the French pastry, croissant, is made by folding multiple layers of dough.
- Dielectric capacitors have ultrahigh power density, which makes them suitable for high power and pulse power technologies that require accumulating energy over a period of time and then releasing it very quickly.
- Croissants are made by pressing and folding dough to create a layered pastry. The researchers applied this technique to a dielectric capacitor.
- By pressing and folding a polymer film capacitor — a capacitor with an insulating plastic film — they were able to store 30 times more energy than the best-performing commercially available dielectric capacitor, biaxially oriented polypropylene (BOPP).
- The study shows that this is the highest energy density ever reported in a polymer film capacitor. The advance may pave the way for efficient, low-cost, and environmentally-friendly electric energy storage systems for wind and solar sources.
However, dielectric capacitors are limited by the low amounts of energy they can currently store. This research study tackles this limitation. Currently, there are three main energy storage options: batteries, electrochemical capacitors and dielectric capacitors for example motor drives, mobile power systems, space vehicle power systems and electrochemical guns.
Source: Economic Times