Electrochemical double layer capacitor having carbon powder electrodes
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United States of America Patent
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Sep 20, 2005
Grant Date -
May 13, 2004
app pub date -
Sep 12, 2003
filing date -
Nov 2, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of making an electrode structure, the electrode structure and a double layer capacitor including the electrode structure, the method comprising the steps of: forming a plurality of electrodes, each having a current collector plate, a primary coating formed on each side of the collector plate, the primary coating including conducting carbon powder and a binder, and a secondary coating formed on each primary coating, the secondary coating including activated carbon powder, a solvent and a binder; positioning a respective separator between each electrodes while stacking the electrodes such that the respective separator is juxtaposed against respective secondary coatings of adjacent electrodes that electrically insulates the adjacent electrodes, whereby forming an electrode stack; and rolling the electrode stack into a cylindrical electrode structure.
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