Electrode covering for electrochemical cells
First Claim
1. In an electrochemical cell comprising anode and cathode electrodes and an operatively associated electrolyte, the improvement comprising:
- a covering at one or more interfaces of the electrodes and the electrolyte, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material.
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Accused Products
Abstract
In an alkali metal-halogen or oxyhalide electrochemical cell wherein an alkali metal anode, preferably lithium, has a surface in operative contact with a halogen-containing or oxyhalide cathode/electrolyte including a solvent if necessary, an electrode covering, preferably applied on the anode surface comprising a non-fabric, continuous and solid film of substrate material having a uniform unit weight, is described. The substrate material is perforated to provide for ion flow therethrough and coated with organic electron donor material, or other suitable coating material. The film substrate material preferably comprises a mechanically perforated synthetic polyester film material, and the film is prepared by contacting with a solution of the organic material and solvent followed by drying. The resulting coated film is flexible and is applied to the operative surface of the electrode thereby covering the same, preferably adhered to the surface by pressing. The flexible film can be applied equally well to electrode surfaces which are either smooth and flat or irregular.
57 Citations
75 Claims
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1. In an electrochemical cell comprising anode and cathode electrodes and an operatively associated electrolyte, the improvement comprising:
a covering at one or more interfaces of the electrodes and the electrolyte, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. In an alkali metal-halogen electrochemical cell comprising anode and cathode electrodes and an operatively associated electrode, the improvement comprising:
a covering at one or more interfaces of the electrodes and the electrolyte, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (8, 9, 10, 11)
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12. In an alkali metal-halogen electrochemical cell wherein an alkali metal anode has a surface in contact with a solid electrolyte, the improvement comprising:
a covering at the interface of the electrodes on the anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. In a lithium-halogen electrochemical cell wherein a lithium anode has a surface in operative contact with a solid electrolyte, the improvement comprising:
a covering adhered to the lithium anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An anode for an alkali metal-halogen electrochemical cell comprising:
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a) an anode body of alkali metal having a surface for operative contact with a solid electrolyte of the cell; b) anode electrical conductor means operatively associated with the anode body; and c) a covering on the anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. In an alkali metal-oxyhalide electrochemical cell wherein an alkali metal anode has a surface in operative contact with a liquid cathode/electrolyte, the improvement comprising:
a covering on the anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (50, 51, 52, 53, 54, 55, 56, 57, 58)
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59. In an alkali metal-oxyhalide electrochemical cell wherein a lithium anode has a surface in operative contact with a liquid cathode/electrolyte, the improvement comprising:
a covering adhered to the lithium anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (60, 61, 62, 63, 64, 65, 66)
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67. The anode for alkali metal-oxyhalide electrochemical cell comprising:
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a) an anode body of alkali metal having a surface for operative contact with a liquid electrolyte of the cell; b) anode electrical conductor means operatively associated with the anode body; and c) a covering on the anode surface, the covering comprising a non-fabric, continuous film of anode ion impermeable substrate material having a uniform unit weight and perforated with a pattern of openings, each opening having a desired shape to provide for anode ion flow therethrough, wherein the substrate material is uniformly coated with an organic electron donor material. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75)
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Specification