Polymer electrolyte fuel cell
First Claim
1. A polymer electrolyte fuel cell comprising;
- a polymer electrolyte membrane,an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas,a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode,a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas,a supply means for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and,a temperature control means for controlling a fuel cell operating temperature;
so that a reduction amount of water from the cathode catalytic electrode together with the oxidation gas adds a first water amount increased at the cathode catalytic electrode by being transported from the anode catalytic electrode through the polymer electrode membrane during a redox reaction of the fuel cell and a second water amount produced in the cathode catalytic electrode by an oxidation reaction in the cathode catalytic electrode.
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Accused Products
Abstract
A polymer electrolyte fuel cell comprising a polymer electrolyte membrane, an anode catalytic electrode disposed at one side of the polymer electrolyte membrane, a fuel gas being supplied to the anode catalytic electrode, a cathode electrode disposed at another side of the polymer electrolyte, an oxidation gas being supplied to the cathode catalytic electrode, control means for controlling a reduction amount of water from the cathode electrode accompanying with the oxidation gas to a sum of a water amount increased at the cathode electrode transported from the anode electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell and a water amount produced by an oxidation reaction in the cathode electrode. A compact fuel cell system with a high cell performance can be accomplished.
44 Citations
34 Claims
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1. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane, an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, a supply means for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and, a temperature control means for controlling a fuel cell operating temperature;
so that a reduction amount of water from the cathode catalytic electrode together with the oxidation gas adds a first water amount increased at the cathode catalytic electrode by being transported from the anode catalytic electrode through the polymer electrode membrane during a redox reaction of the fuel cell and a second water amount produced in the cathode catalytic electrode by an oxidation reaction in the cathode catalytic electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane having a thickness in a range of about 20 μ
m-80 μ
m,an anode catalytic electrode disposed at one side of the polymer electrolyte membrane for receiving a fuel gas, and a cathode catalytic disposed at another side of the polymer electrolyte for receiving an oxidation gas, wherein no oxidation gas humidifier is provided and an operating temperature of the fuel cell is to be maintained at about 50°
C.-70°
C. - View Dependent Claims (11, 12, 13)
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14. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane, an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, a supply means for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and temperature control means for controlling a fuel cell operating temperature so that a water supply amount at the anode catalytic electrode is greater than a water amount transported from the anode catalytic electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane, an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel was, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, a supply means for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and, a temperature control means for controlling a fuel cell operating temperature;
so that a reduction amount of water from the cathode catalytic electrode together with the oxidation gas adds a first water amount increased at the cathode catalytic electrode by being transported from the anode catalytic electrode through the polymer electrode membrane during a redox reaction of the fuel cell and a second water amount produced in the cathode catalytic electrode by an oxidation reaction in the cathode catalytic electrode wherein a water supply amount at the anode catalytic electrode is greater than a water amount transported from the anode electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane, an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, an oxidation gas supplier for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and, a temperature control mechanism to control a fuel cell operating temperature so that a reduction amount of water from the cathode catalytic electrode together with the oxidation as adds a water amount increased at the anode catalytic electrode be transport by a water produced at the anode electrode from the anode catalytic electrode to the cathode catalytic electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell and a water amount produced by an oxidation reaction in the cathode catalytic electrode. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane having a thickness in a range of about 20 μ
m-80 μ
m,an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, an oxidation gas supplier for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and a temperature control mechanism to control a fuel cell operating temperature so that a reduction amount of water from the cathode catalytic electrode together with the oxidation as adds a water amount increased at the anode catalytic electrode being transported by a water produced at the anode electrode from the anode catalytic electrode to the cathode catalytic electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell and a water amount produced by an oxidation reaction in the cathode catalytic electrode.
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34. A polymer electrolyte fuel cell comprising;
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a polymer electrolyte membrane having a thickness in a range of about 20 μ
m-80 μ
m,an anode catalytic electrode disposed at one side the polymer electrolyte membrane for receiving a fuel gas, a humidifier for supplying said fuel gas being supplied to the anode catalytic electrode, a cathode catalytic electrode disposed at another side of the polymer electrode for receiving an oxidation gas, a supply means for supplying said oxidation gas being supplied to the cathode catalytic electrode without a humidifier, and temperature control means for controlling a fuel cell operating temperature so that a water supply amount at the anode catalytic electrode is greater than a water amount transported from the anode catalytic electrode through the polymer electrolyte membrane during a redox reaction of the fuel cell.
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Specification