Chemistry: electrical current producing apparatus – product – and – Fuel cell – subcombination thereof – or method of making or... – Process or means for control of operation
Reexamination Certificate
2011-01-04
2011-01-04
Yuan, Dah-Wei D (Department: 1795)
Chemistry: electrical current producing apparatus, product, and
Fuel cell, subcombination thereof, or method of making or...
Process or means for control of operation
C429S433000, C429S442000, C429S483000
Reexamination Certificate
active
07862940
ABSTRACT:
In accordance with one embodiment of the present invention, a method of operating an electrochemical conversion cell is provided wherein the method comprises the steps of (i) initiating a membrane dehydration sequence when the membrane is characterized by an initial membrane hydration λWETand (ii) maintaining the membrane dehydration sequence until the membrane is characterized by a target membrane hydration λDRY. According to the method, the membrane dehydration sequence is characterized by a drying rate that varies in a manner that substantially corresponds to a fatigue life contour map of the membrane. Additional methods and corresponding systems are contemplated.
REFERENCES:
patent: 2008/0038594 (2008-02-01), Lai et al.
Lai et al., Viscoelastic Stress Model and Mecanical Characterization of Perfluorosulfonic Acid (PFSA) Polymer Electrolyte Membranes. In: Proceedings of the 3rd International Conference on Fuel Cell Science Engineering and Technology, May 23-25, 2005, Ypsilaniti, Michicagn, pp. 1-7.
Yeh-Hung Lai, Craig S. Gittleman, Cortney K. Mittelsteadt and David A. Dillard, FuelCell2005-74120—Viscoelastic Stress Model and Mechanical Characterization of Perfluorosulfonic Acid (PFSA) Polymer Electrolyte Membranes, The Third International Conference on Fuel Cell Science, Engineering and Technology, May 23-25, 2005, Ypsilanti, Michigan, pp. 1-7.
Davis Patricia
Dinsmore & Shohl LLP
GM Global Technology Operations Inc.
Yuan Dah-Wei D
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