Electrodes for metal/air batteries and fuel cells and bipolar metal/air batteries incorporating the same
First Claim
Patent Images
1. A bipolar primary metal/air battery of the type having a plurality of electrically series-connected cells, each cell comprising:
- a) a metallic slurry anode, containing oxidizable metal particles and an alkaline electrolyte;
b) a current-collecting electrolyte-impervious metallic structure having a first surface in contact therewith for collecting current from said metallic slurry anode;
c) a metallic foamed or fiber mat having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, said mat constituting an air cathode;
d) means for introducing oxygen into said mat, ande) a porous separator positioned adjacent to said second surface of said mat and which allows the migration of said alkaline electrolyte therethrough.
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Abstract
The invention provides an electrode for use in a primary metal/air battery or in a hydrogen-oxygen fuel cell comprising a current-collecting metallic structure and a metallic foamed or fiber mat having a first surface attached to a first surface of the structure, a second surface of the mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer.
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Citations
20 Claims
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1. A bipolar primary metal/air battery of the type having a plurality of electrically series-connected cells, each cell comprising:
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a) a metallic slurry anode, containing oxidizable metal particles and an alkaline electrolyte; b) a current-collecting electrolyte-impervious metallic structure having a first surface in contact therewith for collecting current from said metallic slurry anode; c) a metallic foamed or fiber mat having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, said mat constituting an air cathode; d) means for introducing oxygen into said mat, and e) a porous separator positioned adjacent to said second surface of said mat and which allows the migration of said alkaline electrolyte therethrough. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A bipolar primary metal/air battery of the type having a plurality of electrically series-connected cells, each cell comprising:
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a) a static bed metallic slurry anode, containing oxidizable metal particles and an alkaline electrolyte; b) a current-collecting electrolyte-impervious metallic structure having a first surface in contact therewith for collecting current from said metallic slurry anode; c) a mat of nickel foam, nickel fibers or nickel coated fibers having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, said mat constituting an air cathode. d) means for introducing oxygen into said mat; and e) a porous separator positioned adjacent to said second surface of said mat and which allows the migration of said alkaline electrolyte therethrough.
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17. An electrode for use in a primary metal/air battery or in a hydrogen-oxygen fuel cell comprising;
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a) current-collecting metallic structure; and b) a metallic foamed or fiber mat having a first surface attached to a first surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer.
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18. A bipolar electrode for use in a primary metal/air battery of the type having a metallic slurry anode, said electrode comprising:
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a) a current-collecting electrolyte-impervious metallic structure having a first surface for collecting current from said metallic slurry anode; and b) a metallic foamed or fiber mat having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, said mat constituting an air cathode.
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19. A bipolar electrode for use in a primary metal/air battery of the type having a metallic slurry anode, said electrode comprising:
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a) a current-collecting electrolyte-impervious metallic structure having a first surface for collecting current from said metallic slurry anode; and b) a mat of nickel foam, nickel fibers or nickel-coated fibers having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, said mat constituting an air cathode.
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20. A bipolar electrode for use in a primary fuel cell battery comprising:
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a) a current-collecting electrolyte-impervious metallic structure; b) a first mat of nickel foam, nickel fibers or nickel-coated fibers having a first surface attached to a first surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, catalytic for oxygen reduction, said mat constituting a cathode. c) a second mat of nickel foam, nickel fibers or nickel-coated fibers having a first surface attached to a second surface of said structure, a second surface of said mat being impregnated with an inner hydrophobic waterproof barrier layer coated with an outer active catalytic layer, catalytic for hydrogen oxidation, said mat constituting an anode.
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Specification