Cathodes and reservoirs for aqueous lithium/air battery cells
First Claim
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1. A battery cell, comprising:
- a protected anode, comprising,a lithium metal anode having a first surface and a second surface,a protective membrane architecture on at least the first surface of the anode,a cathode compartment comprising a cathode for reducing molecular oxygen, an active aqueous catholyte, and a solid porous reservoir structure, wherein the catholyte, prior to initial discharge, has an equilibrium relative humidity of less than 50%; and
wherein the protective membrane architecture comprises one or more materials configured to provide a first membrane surface chemically compatible with the alkali metal anode in contact with the anode, and a second membrane surface substantially impervious to and chemically compatible with the components of the cathode compartment; and
wherein the solid porous reservoir structure comprises a carbonaceous porous structure.
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Abstract
Li/air battery cells are configurable to achieve very high energy density. The cells include a protected a lithium metal or alloy anode and an aqueous catholyte in a cathode compartment. In addition to the aqueous catholyte, components of the cathode compartment include an air cathode (e.g., oxygen electrode) and a variety of other possible elements.
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Citations
9 Claims
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1. A battery cell, comprising:
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a protected anode, comprising, a lithium metal anode having a first surface and a second surface, a protective membrane architecture on at least the first surface of the anode, a cathode compartment comprising a cathode for reducing molecular oxygen, an active aqueous catholyte, and a solid porous reservoir structure, wherein the catholyte, prior to initial discharge, has an equilibrium relative humidity of less than 50%; and wherein the protective membrane architecture comprises one or more materials configured to provide a first membrane surface chemically compatible with the alkali metal anode in contact with the anode, and a second membrane surface substantially impervious to and chemically compatible with the components of the cathode compartment; and wherein the solid porous reservoir structure comprises a carbonaceous porous structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification