US4047289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming a slurry battery cell
Assignee: Polaroid Corp
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Filing: 1976-06-07
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Granted: 1977-09-13
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Expires: 1996-06-07
Abstract
Abstract A method for forming a slurry cell electrode structure which serves as a component of a planar battery. The slurry electrode structure is formed in situ as a particulate dispersion of active material in aqueous electrolyte. The method utilizes a slurry precursor prepared by predepositing a liquid carried dispersion of the particulate active material over the surface of a select component, such as a separator, current collector, or intercell connector of the cell. This deposition is dried and prepared as a subassembly which is appropriately inserted within the multicell pile structure as a step in the manufacture of a multicell battery. By wetting the subassembly with a wash coat of aqueous electrolyte, in situ slurry formation is provided.
Inventors
- 👤 Otto E. Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:11
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/62; H01M4/621; H01M6/00; H01M6/40; H01M6/42; H01M6/46; H01M6/48; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108; Y10T29/49114; Y10T29/49115
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
The method of forming a planar battery cell electrode comprising a particulate dispersion of active electrode material in aqueous electrolyte, comprising the steps of depositing a dispersion of said particulate active electrode material in a solution of water and a water-soluble binding agent on at least a portion of the surface of a select component of said cell, drying said dispersion sufficiently to provide a manipulatory laminar subassembly of said particulate material adhered to said component by said binding agent, positioning said subassembly at an electrode defining site, and wetting said particulate material with an aqueous electrolyte solution in which said binding agent is soluble to dissolve said binding agent and thereby form an aqueous slurry of said particulate material.
Claim 2
Independent Claim
120 words
The method of forming a planar battery cell electrode comprising a particulate dispersion of active electrode material in aqueous electrolyte, comprising the steps of depositing a dispersion of said particulate active electrode material in a solution of water and a water-soluble binding agent on at least a portion of the surface of a select component of said cell, drying said dispersion sufficiently to provide a manipulatory laminar subassembly of said particulate material adhered to said component by said binding agent, positioning said subassembly at an electrode defining site, and wetting said particulate material with an aqueous electrolyte solution in which said binding agent is soluble to dissolve said binding agent and thereby form an aqueous slurry of said particulate material.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said aqueous dispersion of particulate electrode active material is deposited over the surface of a continuous web of separator material.
Claim 4
Dependent Claim
30 words
The method of claim 1, in which said aqueous dispersion of particulate electrode active material is deposited over a portion of the surface of a sheet of conductive plastic material.
Claim 5
Dependent Claim
22 words
The method of claim 1, in which said subassembly is positioned in association with the surface of the collector of said electrode.
Claim 6
Dependent Claim
22 words
The method of claim 1, in which said dried dispersion of particulate electrode active material is wetted with an aqueous gel electrolyte.
Claim 7
Dependent Claim
22 words
The method of claim 2, wherein said coated continuous web is severed to form discrete said subassemblies subsequent to said drying step.
Claim 8
Dependent Claim
31 words
The method of claim 1, including the step of attaching said subassembly to a border seal subsequent to said drying and prior to the positioning thereof at said electrode defining site.
Claim 9
Dependent Claim
31 words
The method of claim 6, including the step of attaching said subassembly to a border seal subsequent to said drying and prior to the positioning thereof at said electrode defining site.
Claim 10
Dependent Claim
12 words
The method of claim 1, wherein said aqueous electrolyte is a gel.
Claim 11
Dependent Claim
13 words
The method of claim 1, wherein said particulate electrode material is anode active.
Claim 12
Dependent Claim
13 words
The method of claim 1 wherein said particulate electrode material is cathode active.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |