US4731310A
Expired / Lapsed
US
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Cathodic electrode
Assignee: WR Grace and Co
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Filing: 1986-08-15
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Granted: 1988-03-15
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Expires: 2006-08-15
Abstract
Abstract A polymer bonded sheet product suitable for use as a cathodic electrode in a non-aqueous battery system wherein the cathodic electrode is a microporous sheet composed of from 6-10 weight percent polyethylene having a molecular weight of 200,000 to 500,000, 90-94 weight percent of titanium disulfide particulate material and from 0 to 2 weight percent of a plasticizer for the polyethylene; the sheet having a void volume of from 15 to 25 percent.
Inventors
- 👤 Menahem Anderman
- 👤 Joseph T. Lundquist, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:47
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/13; H01M4/136; H01M10/00; H01M10/05; H01M10/052; H01M4/36; H01M4/58; H01M4/581; H01M4/5815; H01M4/62; H01M4/621; H01M4/624; H01M4/625; H01M50/00; H01M50/40; H01M50/489; H01M10/058; H01M10/0587; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
123 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product having a void volume of from 15 to 25 volume percent and having a composition consisting essentially of from about 90-94 weight percent of particulate material consisting essentially of titanium disulfide having an average particle size of less than about 20 microns, from about 6-10 weight percent of high density polyethylene having a weight average molecular weight of from about 200,000 to 500,000 and from 0 to about 2 weight percent of an organic plasticizer for said polyethylene; and a current collector composed of a conductive material, said collector being in intimate contact with each of said at least one microporous sheet product.
Claim 2
Dependent Claim
123 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product having a void volume of from 15 to 25 volume percent and having a composition consisting essentially of from about 90-94 weight percent of particulate material consisting essentially of titanium disulfide having an average particle size of less than about 20 microns, from about 6-10 weight percent of high density polyethylene having a weight average molecular weight of from about 200,000 to 500,000 and from 0 to about 2 weight percent of an organic plasticizer for said polyethylene; and a current collector composed of a conductive material, said collector being in intimate contact with each of said at least one microporous sheet product.
Claim 3
Dependent Claim
32 words
The electrode of claim 1 wherein the current collector is in the form of a screen, grid, expanded metal, foil or woven or non-woven fabric formed from carbon or a conductive metal.
Claim 4
Dependent Claim
62 words
The electrode of claim 1 wherein the polyethylene has a weight average molecular weight of from about 200,000 to about 300,000, the void volume is from 15 to 22 volume percent, the polymer is present in 7 to 9 weight percent; the titanium disulfide is present in from 91 to 93 weight percent; and the plasticizer is present in 0-1 weight percent.
Claim 5
Dependent Claim
21 words
The electrode of claim 2 wherein the polyethylene has a weight average molecular weight of from about 200,000 to about 300,000.
Claim 6
Dependent Claim
33 words
The electrode of claim 1 composed of two sheet products and having the current collector therebetween; said sheet products forming a substantially unitary structure of total thickness of less than about 50 mils.
Claim 7
Dependent Claim
33 words
The electrode of claim 2 composed of two sheet products and having the current collector therebetween; said sheet products forming a substantially unitary structure of total thickness of less than about 50 mils.
Claim 8
Dependent Claim
33 words
The electrode of claim 3 composed of two sheet products and having the current collector therebetween; said sheet products forming a substantially unitary structure of total thickness of less than about 50 mils.
Claim 9
Dependent Claim
33 words
The electrode of claim 4 composed of two sheet products and having the current collector therebetween; said sheet products forming a substantially unitary structure of total thickness of less than about 50 mils.
Claim 10
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 1.
Claim 11
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 2.
Claim 12
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 3.
Claim 13
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 4.
Claim 14
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode ad a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 5.
Claim 15
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 6.
Claim 16
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 7.
Claim 17
Dependent Claim
49 words
In a secondary non-aqueous battery comprising at least one pair of electrodes composed of anodic electrode and a cathodic electrode and a non-aqueous electrolyte composition, said anodic electrode formed from an alkali metal, wherein the improvement comprises having the cathodic electrode consist essentially of the product of claim 8.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |