Negative electrode current collector for heterogeneous electrochemical capacitor and method of manufacture thereof
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United States of America Patent
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Jun 25, 2013
Grant Date -
Sep 11, 2008
app pub date -
Feb 19, 2008
filing date -
Feb 19, 2007
priority date (Note) -
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Abstract
A current collector for use in an electric double layer electrochemical capacitor having a sulfuric acid electrolyte. The current collector uses a conducting carbon (e.g., graphite foil) basis with p-type conductivity. A protective film covers at least a portion of the graphite foil basis. The protective film is comprised of a conducting composite material made with a conducting carbon and a conducting organic polymer with p-type conductivity. The protective film is grown on the current collector basis such that it preferably fills the pores of the current collector basis. A lug portion of the current collector basis may be protected with an insulating polymer material.
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