High voltage EDLC cell and method for the manufacture thereof
AssigneeIoxus, Inc.
InventorThor E. Eilertsen
Life of this patent
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Abstract
An EDLC device in which the double layer capacitors themselves are produced lithographically. The resultant EDLC can be of any capacitance and voltage combination for a particular application. The entire lithographically formed entity can be housed in a single container and rated according to its capacitance and voltage standoff characteristics. Through material control processes, the electrochemical composites developed onto the current collector is unilaterally equalized, providing the desired distributed voltage standoffs, thus promoting the ability to design high voltage independent cells without the normal electronic balancing circuitry associated with multiple series-connected electrochemical cells.
Claims22
An electrochemical double layer capacitor comprising a unit cell structure comprising alternately interleaved electrodes formed lithographically and a preformed separator disposed between said electrodes and impregnating an electrolyte therein, wherein said unit cell comprises preformed electrodes having contained individual components specific to each electrode sequentially, wherein at least one component of each electrode is formed from a PVDF material providing a gasket type composite from a screening machine formed on a surrounding perimeter of capacitor grade aluminum.
An electrode assembly for an electrochemical double layer capacitor, comprising:
- a) a first electrode having an upper surface and a lower surface, both of said first electrode surfaces being coated with activated carbon, at least a portion of said first electrode is formed from a PVDF material providing a gasket type composite from a screening machine formed on a surrounding perimeter of capacitor grade aluminum;
- b) a first aluminum current collector proximate said first electrode;
- c) a separator proximate said first aluminum current collector;
- d) a second electrode having an upper surface and a lower surface, both of said second electrode surfaces being coated with activated carbon, said second electrode proximate said separator, at least a portion of said second electrode is formed from a PVDF material providing a gasket type composite from a screening machine formed on a surrounding perimeter of capacitor grade aluminum;
- and
- e) a second aluminum current collector proximate said second electrode.
Dependencies are inferred from the claim text.