Patent US5296318A successfully refreshed from Google Patents.
US5296318A
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Rechargeable lithium intercalation battery with hybrid polymeric electrolyte
Assignee: Valence Technology Inc
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Filing: 1993-03-05
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Granted: 1994-03-22
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Expires: 2013-03-05
Abstract
Abstract A rechargeable battery comprises lithium intercalation compound electrodes and an interposed electrolyte of flexible polymer containing a lithium salt dissolved in a polymer-compatible solvent. Preferred components include tertiary lithium manganese oxide compound positive electrodes, carbon negative electrodes, and poly(vinylidene fluoride) copolymer electrolyte layers containing about 20 to 70% of a solution of lithium salt in a medium boiling solvent comprising such solvents as ethylene carbonate, propylene carbonate, and dimethyl carbonate. The electrolyte layers may be employed in the form of individual separator films or as a coated component of multilayer battery structures to provide electrical ionic conductivity up to about 10 -3 S/cm.
Inventors
- 👤 Antoni S. Gozdz
- 👤 Caroline N. Schmutz
- 👤 Jean-Marie Tarascon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:15
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/426; H01M50/489; H01M50/494; H01M50/497; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
67 words
A solid electrolyte for a rechargeable lithium intercalation battery cell comprising a dissociable lithium salt dispersed in a polymeric matrix characterized in that said electrolyte comprises a substantially self-supporting film of a copolymer of vinylidene fluoride with 8 to 25% by weight hexafluoropropylene, said film having homogeneously distributed therein 20 to 70% by weight of a solution of at least one lithium salt in a medium-boiling solvent.
Claim 2
Dependent Claim
67 words
A solid electrolyte for a rechargeable lithium intercalation battery cell comprising a dissociable lithium salt dispersed in a polymeric matrix characterized in that said electrolyte comprises a substantially self-supporting film of a copolymer of vinylidene fluoride with 8 to 25% by weight hexafluoropropylene, said film having homogeneously distributed therein 20 to 70% by weight of a solution of at least one lithium salt in a medium-boiling solvent.
Claim 3
Dependent Claim
47 words
An electrolyte according to claim 1 characterized in that said lithium salt is selected from the group consisting of LiPF 6 , LiAsF 6 , LiClO 4 , LiN(CF 3 SO 2 ) 2 , LiBF 4 , LiCF 3 SO 3 , and LiSbF 6 .
Claim 4
Dependent Claim
33 words
An electrolyte according to claim 1 characterized in that said solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethoxyethane, diethyl carbonate, dimethoxyethane, dipropyl carbonate, and mixtures thereof.
Claim 5
Dependent Claim
74 words
An electrolyte according to claim 1 characterized in that a) said lithium salt is selected from the group consisting of LiPF 6 , LiAsF 6 , LiClO 4 , LiN(CF 3 SO 2 ) 2 , LiBF 4 , LiCF 3 SO 3 , and LiSbF 6 ; and b) said solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethoxyethane, diethyl carbonate, dimethoxyethane, dipropyl carbonate, and mixtures thereof.
Claim 6
Dependent Claim
18 words
An electrolyte according to claim 1 characterized in that said copolymer contains 12 to 20% by weight hexafluoropropylene.
Claim 7
Dependent Claim
18 words
An electrolyte according to claim 4 characterized in that said copolymer contains 12 to 15% by weight hexafluoropropylene.
Claim 8
Dependent Claim
22 words
An electrolyte according to claim 6 characterized in that said film comprises 40 to 60% by weight of said lithium salt solution.
Claim 9
Dependent Claim
70 words
A rechargeable lithium intercalation battery cell comprising a positive electrode, a negative electrode, and an ionically conductive solid electrolyte disposed between said electrodes characterized in that said electrolyte comprises a substantially self-supporting film of a copolymer of vinylidene fluoride with 8 to 25% by weight hexafluoropropylene, said film having homogeneously distributed therein 20 to 70% by weight of a solution of at least one lithium salt in a medium-boiling solvent.
Claim 10
Dependent Claim
70 words
A rechargeable lithium intercalation battery cell comprising a positive electrode, a negative electrode, and an ionically conductive solid electrolyte disposed between said electrodes characterized in that said electrolyte comprises a substantially self-supporting film of a copolymer of vinylidene fluoride with 8 to 25% by weight hexafluoropropylene, said film having homogeneously distributed therein 20 to 70% by weight of a solution of at least one lithium salt in a medium-boiling solvent.
Claim 11
Dependent Claim
27 words
A battery cell according to claim 8 characterized in that said negative electrode comprises a material selected from the group consisting of lithium, lithium alloys, and carbon.
Claim 12
Dependent Claim
18 words
A battery cell according to claim 9 characterized in that said positive electrode comprises a lithium intercalation compound.
Claim 13
Dependent Claim
22 words
A battery cell according to claim 8 characterized in that said electrolyte film comprises an individual separator element interposed between said electrodes.
Claim 14
Dependent Claim
24 words
A battery cell according to claim 8 characterized in that said electrolyte film comprises a layer coated on at least one of said electrodes.
Claim 15
Dependent Claim
48 words
A battery cell according to claim 8 characterized in that said lithium salt is selected from the group consisting of LiPF 6 , LiAsF 6 , LiClO 4 , LiN(CF 3 SO 2 ) 2 , LiBF 4 , LiCF 3 SO 3 , and LiSbF 6 .
Claim 16
Dependent Claim
33 words
An electrolyte according to claim 8 characterized in that said solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethoxyethane, diethyl carbonate, dimethoxyethane, dipropyl carbonate, and mixtures thereof.
Claim 17
Dependent Claim
72 words
An electrolyte according to claim 8 characterized in that said lithium salt is selected from the group consisting of LiPF 6 , LiAsF 6 , LiClO 4 , LiN(CF 3 SO 2 ) 2 , LiBF 4 , LiCF 3 SO 3 , and LiSbF 6 ; and said solvent is selected from the group consisting of ethylene carbonate, propylene carbonate, dimethyl carbonate, diethoxyethane, diethyl carbonate, dimethoxyethane, dipropyl carbonate, and mixtures thereof.
Claim 18
Dependent Claim
18 words
An electrolyte according to claim 15 characterized in that said copolymer contains 12 to 20% by weight hexafluoropropylene.
Claim 19
Dependent Claim
18 words
An electrolyte according to claim 16 characterized in that said copolymer contains 12 to 15% by weight hexafluoropropylene.
Claim 20
Dependent Claim
22 words
An electrolyte according to claim 17 characterized in that said film comprises 40 to 60% by weight of said lithium salt solution.
References Cited (Backward Citations)
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