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|18th September 2008, 18:56||#1|
Join Date: May 2002
Flowers are secret ingredient for ultra-capacitors
Ultra-capacitors can be thought of as a hybrid between batteries and capacitors. Whereas batteries are slow to charge as they store their electricity chemically, capacitors store energy in ion form in vast little "holes" or "reservoirs" where the ions can accumulate, traditionally in a carbon-based solution. Because capacitors store their energy that way, they can charge and discharge almost instantly. This has given them their current role in electronics, a type of "noise dampening" line filter for electrical signals.
Researchers began discovering ways to construct capacitor electrolytes (the materials inside the capacitor), which increase their energy storage potential and life expectancy before being completely discharged, some time ago. However, the dominant ultra-capacitor designs up until Zhang's model were based on activated carbon, which provided lots of reservoirs to store ions. And essentially Zhang's model isn't any different in approach, he just figured out a way to create more reservoirs by increasing the surface area and delivery mechanisms for migrating electrons to and from the inner substrate.
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