Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Patent
1996-06-07
1998-08-25
Skapars, Anthony
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
429 26, 429 34, H01M 804
Patent
active
057981868
ABSTRACT:
A method and apparatus are provided for starting and operating an electric power generation system comprising an electrochemical fuel cell stack for supplying electric current to an external electrical circuit. The stack comprises at least one fuel cell comprising a membrane electrode assembly comprising an anode, a cathode, and a water permeable ion exchange membrane interposed between the anode and the cathode. A fuel stream and an oxidant stream are each flowable to the fuel cell. At least a portion of the membrane electrode assembly has a temperature below the freezing temperature of water. The supply of electric current to the external circuit from the fuel cell stack is commenced such that the temperature of the membrane electrode assembly exceeds the freezing temperature of water.
REFERENCES:
patent: 5041344 (1991-08-01), Kamoshita et al.
patent: 5082753 (1992-01-01), Shimizu et al.
patent: 5230966 (1993-07-01), Voss et al.
patent: 5262249 (1993-11-01), Beal et al.
patent: 5482790 (1996-01-01), Yamada et al.
patent: 5503944 (1996-04-01), Meyer et al.
"Environmental Testing Of SPE Fuel Cell Assemblies", Proceedings of the 29th Power Sources Conference, Jun. 9-12, 1980, Adlhart.
"Temperature Dependence Of Water Content And Proton Conductivity In Polyperfluorosulfonic Acid Membranes", Journal of Membrane Science, vol. 32, pp. 313-328, Rieke et al., 1987. No month.
"Freezing And Nonfreezing Water In Charged Membranes", Journal of Membrane Science, vol. 38, pp. 175-183, Tasaka et al., 1988. No month.
"Behavior of water in perfluorinated ionomer membranes containing various monovalent cations", Journal of Membrane Science, vol. 68, pp. 1-10, Yoshida et al., 1992. No month.
"Endurance Testing Of Low Pt Loading Polymer Electrolyte Fuel Cells", Proceedings of the Electrochemical Society, vol. 94, No. 23, pp. 145-156, Wilson et al., 1994. No month.
"Studies of Water in Nafion Membranes Using Deuteron and Oxygen-17 Nuclear Magnetic Resonance, and Dielectric Relaxation Techniques", J. Electrochem. Soc., vol. 140, No. 4, pp. 889-895, Chen et al., Apr. 1993.
"Determination Of Water Content And Resistivity Of Perfluorosulfonic Acid Fuel Cell Membranes"Mat. Res. Soc. Symp. Proc., vol. 393, pp. 157-162, Sen et al., 1995. No month.
"Conductance of Nafion 117 membranes as a function of temperature and water content", Solid State Ionics, vol. 77, pp. 65-69, Cappadonia et al., 1995. No month.
Boehm Gustav A.
Fletcher Nicholas J.
Pow Eric G.
Ballard Power Systems Inc.
Skapars Anthony
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