Composite electrode for use in electrochemical cells
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United States of America Patent
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Feb 14, 1989
Grant Date -
N/A
app pub date -
Oct 16, 1987
filing date -
Oct 16, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A porous composite electrode for use in electrochemical cells. The electrode has a first face and a second face defining a relatively thin section therebetween. The electrode is comprised of an ion conducting material, an electron conducting material, and an electrocatalyst. The volume concentration of the ion conducting material is greatest at the first face and is decreased across the section, while the volume concentration of the electron conducting material is greatest at the second face and decreases across the section of the electrode. Substantially all of the electrocatalyst is positioned within the electrode section in a relatively narrow zone where the rate of electron transport of the electrode is approximately equal to the rate of ion transport of the electrode.
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