Process for fabricating continuously coated electrodes on a porous current collector and cell designs incorporating said electrodes
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United States of America Patent
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Sep 14, 2004
Grant Date -
Sep 19, 2002
app pub date -
Mar 12, 2002
filing date -
Mar 15, 2001
priority date (Note) -
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Abstract
The invention is directed to an electrochemical cell having at least one of its electrodes produced by coating a slurry mixture of an active material, possibly a conductive additive, and a binder dispersed in a solvent and contacted to a perforated current collector foil. It is particularly important that the active slurry does not move through the perforations of the current collector. For this reason, a barrier is placed against the opposite side of the current collector to block the perforations as the current collector is being coated with the slurry. After volatilizing the solvent, a second, different active material is coated to the opposite side of the current collector, either as a slurry, a pressed powder, a pellet or a free standing sheet. An example of this is a cathode having a configuration of: SVO/current collector CF.sub.x. The opposed active materials on the current collector can also be of the same chemistry.
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