From Evans Capacitor Company

Evans new MegaCap™ line of large carbon double
layer capacitors combine high capacitance and
energy density with a low ESR. These capacitors are
constructed using carbon electrodes operating in a
potassium hydroxide electrolyte and are contained in
an efficient metal and polymer package. Devices
from this line are available in sizes to over 40 kJ and
have energy densities of up to 4 J/cc. The electrical
characteristics of a 14 V, 65 F capacitor from this
line are reported and indicate its suitability for a
variety of high current applications. The capacitor
had an RC product of 0.6 and reliably delivered high
power discharges into a variety of loads.

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Products & Services
Capacitors
Capacitors are electronic components used for storing charge and energy. In their simplest form, capacitors consist of two conducting plates separated by an insulating material called the dielectric.
Power Capacitors
Power capacitors are used in electrical distribution systems to provide a static source of leading reactive power.
Chip Capacitors
Chip capacitors or surface mount capacitors do not have leads.
Tantalum Capacitors
Tantalum capacitors are used in smaller electronic devices including portable telephones, pagers, personal computers, and automotive electronics. 

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Topics of Interest

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This paper will describe how film capacitors with energy densities of greater than 1 J/cc and suitable for millisecond discharge applications requiring limited life have been characterized. A variety...

High-energy-density capacitors with a tantalum metal anode, Ta205 dielectric, aqueous electrolyte, and Ru02 cathode have been described.1 Known as Evans Ilybriif capacitors, these devices have the...

High-energy-density capacitors with a tantalum metal anode, Ta2O5 dielectric, aqueous electrolyte, and RuO2 cathode have been described.1 Known as Evans Hybrid capacitors, these devices have the high...

4.6 Supercapacitors Supercapacitors (also termed electrochemical capacitors or ultracapacitors) store energy in the electric field of an electrochemical double layer. While their specific power is...