Post-molding treatment of current collector plates for fuel cell to improve conductivity
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United States of America Patent
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Issued Date -
Sep 30, 2004
app pub date -
Jun 23, 2003
filing date -
Mar 27, 2003
priority date (Note) -
Abandoned
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Abstract
Disclosed is a method of making a current collector plate for use in a proton exchange membrane fuel cell. The method includes the steps of: (a) molding the current collector plate by injection, compression or any other molding process from a resin/conductive filler composition; (b) measuring the current collector plate's average thickness; (c) measuring the current collector plate's through-plane resistivity; (d) removing a portion of the current collector plate's surface layer by abrasion; and (e) repeating steps (a) to (d) until a desired plate thickness is removed. The desired plate thickness removed is no more than about 10 micrometers, and preferably about 5 micrometers.
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