Symbols for SMD transistors

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Symbols of SMD transistors (reference book 4 Kb)

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Random news from the Archive

Refractory clay supercapacitor 21.09.2013

Clay has become a key component of a new supercapacitor that can operate at temperatures up to 300 degrees - this device can be used, in particular, in the space industry and for military purposes, and in other areas where high temperature resistance is required.

Supercapacitors - "hybrids" between batteries and conventional capacitors - are distinguished by their ability to deliver a large amount of energy in a short time.

However, the operating temperature of existing supercapacitors is limited due to the instability of the electrolyte and separator (dielectric layer that separates the plates). As the temperature rises, the dielectric is destroyed, which leads to a short circuit.

In the new supercapacitor, scientists from Rice University (USA) used clay as a dielectric, and an ionic liquid at room temperature as an electrolyte. The scientists distributed the composite paste of ionic liquid and clay between the plates - layers of reduced graphene oxide and two current collectors. The study showed that when heated to 200 degrees, no changes occur in the structure of materials - they appear only when heated to 300 degrees.

The supercapacitor combines the best features of its "predecessors" and rechargeable batteries: it charges quickly, stores energy and releases it as needed. As tests have shown, the device works stably even after 10 thousand test cycles.

Scientists believe that their invention will be useful for use in extreme conditions - when drilling oil wells, for military purposes or in space. Supercapacitors are also believed to be the future of electric vehicles.

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