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US6183901B1
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Protective coating for separators for electrochemical cells
Assignee: Sion Power Corp
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Filing: 1999-09-21
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Granted: 2001-02-06
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Expires: 2019-09-21
Abstract
Abstract This invention pertains to separators for electrochemical cells which comprise (i) two microporous pseudo-boehmite layers and (ii) a protective coating layer comprising a polymer interposed between the microporous pseudo-boehmite layers; electrolyte elements comprising such separators; electrical current producing cells comprising such separators; and methods of making such separators, electrolyte elements and cells.
Inventors
- 👤 Qicong Ying
- 👤 Steven A. Carlson
- 👤 Terje A. Skotheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:06
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01G; H01G11/00; H01G11/52; H01M10/052; H01M10/056; H01M10/058; H01M10/0585; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/431; H01M50/434; H01M50/443; H01M50/446; H01M50/449; H01M50/451; H01M50/457; H01M2300/00; H01M2300/0088; H01M2300/0094; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/13; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
39 words
A separator interposed between an anode and a cathode of an electric current producing cell, wherein said separator comprises: (i) two microporous pseudo-boehmite layers; and (ii) a protective coating layer comprising a polymer, interposed between said microporous pseudo-boehmite layers.
Claim 2
Dependent Claim
39 words
A separator interposed between an anode and a cathode of an electric current producing cell, wherein said separator comprises: (i) two microporous pseudo-boehmite layers; and (ii) a protective coating layer comprising a polymer, interposed between said microporous pseudo-boehmite layers.
Claim 3
Dependent Claim
273 words
The separator of claim 1 , wherein said polymer of said protective coating layer comprises one or more moieties formed by polymerization of one more monomers or macromonomers selected from the group consisting of monomers and macromonomers having the formula: R 1 (R 2 O) n —R 3 wherein: R 1 is the same or different at each occurrence and is selected from the group consisting of: CH 2 ═CH(C═O)—O—, CH 2 ═C(CH 3 )(C═O)O—, CH 2 ═CH—, CH 2 ═CH—O—; R 2 is the same or different at each occurrence and is selected from the group consisting of: —CH 2 —CH 2 —, —CH(CH 3 )—CH 2 —, —CH 2 —CH 2 —CH 2 —, —CH(C 2 H 5 )—CH 2 —, —CH 2 —CH 2 —CH 2 —CH 2 —; R 3 is the same or different at each occurrence and is selected from the group consisting of: cyano, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, hexyl, 2-ethylhexyl, decyl, dodecyl, phenyl, butylphenyl, octylphenyl, nonylphenyl, R 1 ,—X—(OR 2 ) m —R 1 , —Y[(OR 2 ) 0 —R 1 ] 2, —Z[(OR 2 ) p —R 1 ] 3 ; X is a divalent radical selected from the group consisting of: —(CH 2 ) r —, where r is 3, 4, or 6; Y is a trivalent radical selected from the group consisting of: Z is a tetravalent radical selected from the group consisting of: m is an integer ranging from 0 to 100; n is an integer ranging from 0 to 100; o is an integer ranging from 0 to 100; and, p is an integer ranging from 0 to 100.
Claim 4
Dependent Claim
60 words
The separator of claim 1 , wherein said polymer of said protective coating layer comprises one or more moieties formed by polymerization of one or more acrylate monomer or macromonomer moieties selected from the group consisting of polyethylene glycol diacrylates, polypropylene glycol diacrylates, ethoxylated neopentyl glycol diacrylates, ethoxylated bisphenol A diacrylates, ethoxylated aliphatic urethane acrylates, ethoxylated alkylphenol acrylates, and alkylacrylates.
Claim 5
Dependent Claim
41 words
The separator of claim 1 , wherein said polymer of said protective coating layer is selected from the group consisting of polyacrylates, polymethacrylates, polyolefins, polyurethanes, polyvinyl ethers, polyvinyl pyrrolidones, acrylonitrile-butadiene rubber, styrene-butadiene rubber, acrylonitrile-butadiene-styrene, sulfonated styrene/ethylene-butylene/styrene triblock polymers, and mixtures thereof.
Claim 6
Dependent Claim
16 words
The separator of claim 1 , wherein said polymer has a molecular weight greater than 10,000.
Claim 7
Dependent Claim
16 words
The separator of claim 1 , wherein said polymer has a molecular weight greater than 50,000.
Claim 8
Dependent Claim
21 words
The separator of claim 1 , wherein said protective coating layer has a thickness of from 0.2 micron to 20 microns.
Claim 9
Dependent Claim
21 words
The separator of claim 1 , wherein said protective coating layer has a thickness of from 0.5 microns to 10 microns.
Claim 10
Dependent Claim
21 words
The separator of claim 1 , wherein said protective coating layer has a thickness of from 0.5 microns to 5 microns.
Claim 11
Dependent Claim
15 words
The separator of claim 1 , wherein said protective coating layer further comprises a pigment.
Claim 12
Dependent Claim
41 words
The separator of claim 10 , wherein said pigment of said protective coating layer is selected from the group consisting of: colloidal silicas, amorphous silicas, surface treated silicas, colloidal aluminas, amorphous aluminas, conductive carbons, tin oxides, titanium oxides, and polyethylene beads.
Claim 13
Dependent Claim
69 words
An electric current producing cell comprising a cathode, an anode and an electrolyte element interposed between said cathode and said anode, wherein said electrolyte element comprises: (a) a separator; and, (b) an electrolyte; wherein, said separator comprises: (i) two microporous pseudo-boehmite layers; and (ii) a protective coating layer comprising a polymer interposed between said two microporous pseudo-boehmite layers, and, wherein said electrolyte is contained within pores of said separator.
Claim 14
Dependent Claim
69 words
An electric current producing cell comprising a cathode, an anode and an electrolyte element interposed between said cathode and said anode, wherein said electrolyte element comprises: (a) a separator; and, (b) an electrolyte; wherein, said separator comprises: (i) two microporous pseudo-boehmite layers; and (ii) a protective coating layer comprising a polymer interposed between said two microporous pseudo-boehmite layers, and, wherein said electrolyte is contained within pores of said separator.
Claim 15
Dependent Claim
16 words
The cell of claim 12 , wherein said cell is a secondary electric current producing cell.
Claim 16
Dependent Claim
16 words
The cell of claim 12 , wherein said cell is a primary electric current producing cell.
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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) | 2004-02-06 | 2004-08-07 | 2005-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-06 | 2008-08-07 | 2009-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-06 | 2012-08-07 | 2013-02-06 | $7700.00 | Window Closed / Lapsed |