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US 6,127,061 AGranted
Catalytic air cathode for air-metal batteries
AssigneeHigh-Density Energy, Inc.
InventorsYou-Keung Shun, Chou-Lui Lou
Life of this patent
Estimating the term…
Abstract
An air cathode for use in an electrochemical cell or battery having an air permeable and water impermeable layer, an electrically conductive middle layer and a catalytic layer comprising a mixture of carbon particles, particulate materials, having a high surface area, metal hydroxides, and hydrophobic particles.
Claims59
A cathode for use in an electrochemical cell comprising:
- an air permeable and water-impermeable portion;
- a catalytic portion comprising a mixture of carbon particles, particulate material having a high surface area, a metal hydroxide, and hydrophobic particles;
- and
- an electrically conductive structure located between said air permeable and water impermeable portion and said catalytic portion, said electrically conductive structure defining sufficient passages to allow air to flow therethrough.
1 more element
A metal-air battery comprising:
- a cathode comprising an air permeable and water impermeable portion, a catalytic layer comprising a mixture of carbon particles, particulate material having a high surface area, a metal hydroxide and hydrophobic particles, and an electrically conductive structure located between said air permeable and water permeable portion and said catalytic portion, said electrically conductive structure defining sufficient passages to allow air or oxygen to flow therethrough;
- a metal anode;
- an electrolyte in contact with said cathode and said anode;
- and
- a liquid impervious case to support said cathode, said anode and said electrolyte.
2 more elements
An electrochemical cell for providing electrical power comprising:
- a metal anode;
- a cathode structure comprising an air permeable and water impermeable portion, a catalytic portion comprising a mixture of carbon particles, particulate material having a high surface area, a metal hydroxide, and hydrophobic particles, said cathode structure oriented such that the catalytic portion faces said metal anode, and an electrically conductive structure defining sufficient passages to allow air to flow therethrough;
- and
- an electrolyte in contact with said cathode and said anode.
1 more element
A cathode for use in an electrochemical cell comprising:
- an air permeable and water-impermeable layer comprising a mixture of carbon particles and PTFE particles having a mixture ration of between about 9:1 and 6:1;
- a conductive metal mesh bonded on one side to said air permeable layer;
- and
- a catalytic layer bonded to the other side of said metal mesh comprising a mixture of about 5 parts graphite particles, about 2 parts of a particulate matter having a high surface area, about 4 parts of wet metal hydroxide, and about 0.2 parts of hydrophobic particles.
1 more element
A metal-air battery comprising:
- a cathode comprising an air permeable and water impermeable layer comprising a matrix of about 6 parts graphite particles and about 1 parts PTFE particles bonded together with epoxy, a conductive metal mesh bonded on one side to said air permeable, water impermeable layer and a catalytic layer bonded to the other side of said metal mesh comprising a mixture of about 5 parts graphite particles, about 2 parts of a particulate mater having a high surface area and about 4 parts of a wet metal hydroxide, and about 0.2 parts of PTFE particles;
- a metal anode selected from the group consists of zinc, iron, cadmium, copper, and aluminum;
- an electrolyte in contact with said cathode and said anode;
- and
- a liquid impervious case to support said cathode, said anode and said electrolyte.
2 more elements
Dependencies are inferred from the claim text.