Fuel cells and fuel cell systems containing non-aqueous electrolytes
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United States of America Patent
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Dec 23, 2003
Grant Date -
Dec 20, 2001
app pub date -
Jun 1, 2001
filing date -
Jun 1, 2000
priority date (Note) -
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Abstract
The present invention provides fuel cells and fuel cell systems that include a non-aqueous electrolyte. Fuel cells according to the present invention include an anode region adapted to receive a hydrogen stream, a cathode region adapted to receive a stream containing oxygen, and an electrolytic barrier that separates the anode region from the cathode region and which contains a non-aqueous electrolyte. The non-aqueous electrolyte is preferably acidic or basic, with the electrolyte having an acid ionization constant (K.sub.a) greater than 5.times.10.sup.-6 at 25.degree. C. if the non-aqueous electrolyte is an acid and a base ionization constant (K.sub.b) greater than 5.times.10.sup.-6 at 25.degree. C. if the non-aqueous electrolyte is a base. The fuel cell has an operating temperature of less than 300.degree. C., and may operate at temperatures above, at, and below 100.degree. C.
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