Patent EP0243653A2 successfully refreshed from Google Patents.
EP0243653A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Cathodic electrode
Assignee: WR Grace and Co Conn
•
Filing: 1987-03-19
•
Granted: —
•
Expires: 2007-03-19
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 2-30 weight percent polyethylene, 70-98 weight percent of electrically conductive and electrochemically active particulate material and from 0 to 5 weight percent of a plasticizer for the polyethylene. The product of the present invention further includes a cathodic electrode product suitable to be placed in intimate contact with an anodic material comprising a substantially unitary, microporous structure wherein each major surface of said structure is a composition of an inert filler in a polyolefin matrix, the inner core of said structure is a composition of from 70-98 weight percent of electrochemically active and electrically conductive particulate material, from 2-30 weight percent polyethylene and from 0 to 5 weight percent polyethylene plasticizer and a current collector in contact and extend from the inner core composition.
Inventors
- 👤 Menahem Anderman
- 👤 Steven Lloyd Johnson
- 👤 Joseph Theodore Lundquist
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 23:12
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M50/00; H01M50/40; H01M50/489; H01M50/491; H01M4/00; H01M4/02; H01M4/62; H01M4/624; H01M4/625; H01M10/052; H01M4/13; H01M4/136; H01M4/139; H01M4/1397; H01M4/36; H01M4/58; H01M4/581; H01M4/621; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
124 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product having a composition of from about 70 - 98 weight percent of particulate material selected from electrochemically active particulate material and electrically conductive particulate material and mixtures thereof (preferably TiS 2 ) alone or together with other metals, from about 2 - 30 weight percent of polyethylene having a weight average molecular weight of from about 150,000 to 5,000,000 (preferably from 200,000 to 500,000) and from 0 to about 5 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
124 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product having a composition of from about 70 - 98 weight percent of particulate material selected from electrochemically active particulate material and electrically conductive particulate material and mixtures thereof (preferably TiS 2 ) alone or together with other metals, from about 2 - 30 weight percent of polyethylene having a weight average molecular weight of from about 150,000 to 5,000,000 (preferably from 200,000 to 500,000) and from 0 to about 5 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
88 words
The electrode of Claim 1 wherein up to about 30 weight percent of said particulate material is composed of a conductive carbon black having an average particle size of from about 1 to 100 millimicrons and the remainder of said particulate material is selected from at least one metal chalcogenide having a metal selected from titanium, zirconium, hafnium, niobium, manganese, copper, iron, tantalum, chromium, vanadium or mixtures thereof (preferably the sole or major chalcogenide being TiS 2 - having an average particulate size of 30 microns or less).
Claim 4
Dependent Claim
120 words
A microporous sheet product suitable for use in forming a cathodic polymer bonded electrode comprising (a) from 70 - 98 weight percent of particulate material selected from electrochemically active and electrically conductive material and mixtures thereof (preferably TiS 2 ) alone or together with other metals; and (b) from about 2 - 30 weight percent of polyethylene having a weight average molecular weight of from about 150,00 to about 5,000,000 (preferably 200,000 to 500,000); and (c) from 0 to 5 weight percent of an organic plasticizer for said polyethylene: said sheet having a void volume of at least about 10 volume percent and capable of exhibiting conductivity of at least about 0.1 reciprocal ohm-cm. when placed in an electrical circuit.
Claim 5
Dependent Claim
120 words
A microporous sheet product suitable for use in forming a cathodic polymer bonded electrode comprising (a) from 70 - 98 weight percent of particulate material selected from electrochemically active and electrically conductive material and mixtures thereof (preferably TiS 2 ) alone or together with other metals; and (b) from about 2 - 30 weight percent of polyethylene having a weight average molecular weight of from about 150,00 to about 5,000,000 (preferably 200,000 to 500,000); and (c) from 0 to 5 weight percent of an organic plasticizer for said polyethylene: said sheet having a void volume of at least about 10 volume percent and capable of exhibiting conductivity of at least about 0.1 reciprocal ohm-cm. when placed in an electrical circuit.
Claim 6
Dependent Claim
133 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product (preferably having a total thickness of less than 50 mils) having a void volume of from 15 to 25 volume percent and having a composition of from about 90 - 94 weight percent of particulate material consisting essentially of titanium disulfide having an average particle size of less than about 30 microns, from about 6 - 10 weight percent of 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 7
Dependent Claim
133 words
A cathodic electrode suitable for use in a non-aqueous battery system comprising at least one substantially homogeneous, microporous sheet product (preferably having a total thickness of less than 50 mils) having a void volume of from 15 to 25 volume percent and having a composition of from about 90 - 94 weight percent of particulate material consisting essentially of titanium disulfide having an average particle size of less than about 30 microns, from about 6 - 10 weight percent of 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 8
Dependent Claim
102 words
A microporous sheet product suitable for use in forming a cathodic polymer bonded electrode comprising: a) from about 90 to 94 weight percent titanium disulfide having an average particle size of less than about 30 microns; b) from about 6 to 10 weight percent of polyethylene having a weight average molecular weight of from about 200,000 to 500,000; and c) from 0 to about 2 weight percent of an organic plasticizer for said polyethylene; said sheet being substantially homogeneous, microporous and having a void volume of from 15 to 25 percent and capable of exhibiting conductivity of at least 0.15 reciprocal ohm-cm.
Claim 9
Dependent Claim
102 words
A microporous sheet product suitable for use in forming a cathodic polymer bonded electrode comprising: a) from about 90 to 94 weight percent titanium disulfide having an average particle size of less than about 30 microns; b) from about 6 to 10 weight percent of polyethylene having a weight average molecular weight of from about 200,000 to 500,000; and c) from 0 to about 2 weight percent of an organic plasticizer for said polyethylene; said sheet being substantially homogeneous, microporous and having a void volume of from 15 to 25 percent and capable of exhibiting conductivity of at least 0.15 reciprocal ohm-cm.
Claim 10
Dependent Claim
202 words
An electrode product comprising a substantially unitary, microporous structure having a first and a second major surface and a thickness of less than about 50 mils, each of said first and second major surface and a thickness adjacent to each major surface composed of a substantially homogeneous outer composition of from about 7 to 35 weight percent of a polyolefin having a weight average molecular weight of at least about 100,000, from about 50 to 93 weight percent of an inert filler having a mean particle size of from about 0.01 to 10 microns and from 0 to about 15 weight percent of an organic plasticizer for said polyolefin, each of the first and second major surface outer composition being separated by a thickness composed of a substantially homogeneous core composition of from about 2 - 30 weight percent polyethylene of a weight average molecular weight of at least about 150,000, from 70 - 98 weight percent of particulate material selected from electrically conductive particulate material, electrochemically active particulate material and mixtures thereof and from 0 to about 5 weight percent of an organic plasticizer for said polyethylene and a current collector of electronically conductive material in contact with said particulate material.
Claim 11
Dependent Claim
202 words
An electrode product comprising a substantially unitary, microporous structure having a first and a second major surface and a thickness of less than about 50 mils, each of said first and second major surface and a thickness adjacent to each major surface composed of a substantially homogeneous outer composition of from about 7 to 35 weight percent of a polyolefin having a weight average molecular weight of at least about 100,000, from about 50 to 93 weight percent of an inert filler having a mean particle size of from about 0.01 to 10 microns and from 0 to about 15 weight percent of an organic plasticizer for said polyolefin, each of the first and second major surface outer composition being separated by a thickness composed of a substantially homogeneous core composition of from about 2 - 30 weight percent polyethylene of a weight average molecular weight of at least about 150,000, from 70 - 98 weight percent of particulate material selected from electrically conductive particulate material, electrochemically active particulate material and mixtures thereof and from 0 to about 5 weight percent of an organic plasticizer for said polyethylene and a current collector of electronically conductive material in contact with said particulate material.
Claim 12
Dependent Claim
69 words
The electrode product of Claim 6 wherein the particulate material has a mean particle size of about 25 microns or less and is composed of from about 70 to 100 weight percent of at least one metal chalcogenide of a metal selected from titanium, zirconium, hafnium, niobium, tantalum, vanadium and mixtures thereof (preferably TiS 2 ) and from 0 to about 30 weight percent of a conductive carbon black.
Claim 13
Dependent Claim
114 words
The electrode product of Claim 6 wherein the polyethylene is present in 2 - 15 weight percent and has a weight average molecular weight of from about 200,000 to 500,000, the particulate material is present in 85 - 98 weight percent and is at least about 70 (preferably 100) weight percent titanium disulfide, the plasticizer for the polyethylene is present in from 0 - 5 weight percent and is selected from a petroleum oil, the polyolefin is present in from 7 - 50 weight percent and has a weight average molecular weight of from 150,000 to 500,000, the inert filler is selected from titania, alumina, silica and the polyolefin plasticizer is a petroleum oil.
Claim 14
Dependent Claim
133 words
A process for forming a microporous sheet product suitable for use as a cathodic electrode comprising; (a) forming a substantially uniform mixture comprising from about 3 to 30 volume percent of polyethylene having a weight average molecular weight of from about 200,000 to about 500,000, from about 27 to about 76 volume percent of particulate titanium disulfide having an average particle size of less than about 20 microns, and from about 20 to 70 volume percent of plasticizer for the polyethylene; (b) shaping the substantially uniform mixture into an initial sheet; (c) forming from the initial sneet an intermediate sheet having from 10 to 22 volume percent plasticizer; (d) compressing the intermediate sheet to provide a substantially nonporous compressed intermediate sheet; and (e) removing substantially all of the plasticizer from said compressed intermediate.
Claim 15
Dependent Claim
133 words
A process for forming a microporous sheet product suitable for use as a cathodic electrode comprising; (a) forming a substantially uniform mixture comprising from about 3 to 30 volume percent of polyethylene having a weight average molecular weight of from about 200,000 to about 500,000, from about 27 to about 76 volume percent of particulate titanium disulfide having an average particle size of less than about 20 microns, and from about 20 to 70 volume percent of plasticizer for the polyethylene; (b) shaping the substantially uniform mixture into an initial sheet; (c) forming from the initial sneet an intermediate sheet having from 10 to 22 volume percent plasticizer; (d) compressing the intermediate sheet to provide a substantially nonporous compressed intermediate sheet; and (e) removing substantially all of the plasticizer from said compressed intermediate.
Claim 16
Dependent Claim
49 words
In a primary or secondary battery comprising at least one pair of electrodes of opposite polarity, and an electrolyte and wherein said anodic electrode is composed of an alkali metal or alloy thereof, the improvement comprises that said cathodic electrode consists essentially of the electrode product of Claim 9.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.