Patent US5571634A successfully refreshed from Google Patents.
US5571634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hybrid lithium-ion battery polymer matrix compositions
Assignee: Valence Technology Inc
•
Filing: 1995-08-03
•
Granted: 1996-11-05
•
Expires: 2015-08-03
Abstract
Abstract A hybrid polymeric matrix composition for a lithium-ion rechargeable battery comprises a copolymer of vinylidene fluoride with about 8 to 20% by weight chlorotrifluoroethylene.
Inventors
- 👤 Antoni S. Gozdz
- 👤 Caroline N. Schmutz
- 👤 Paul C. Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:08
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/28; H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/622; H01M10/00; H01M10/05; H01M10/052; H01M10/0525; H01M10/056; H01M10/0564; H01M10/0565; H01M10/058; H01M10/0585; H01M4/13; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M50/00; H01M50/40; H01M50/409; H01M50/411; H01M50/414; H01M50/426; H01M50/446; H01M50/489; C08J2327/00; C08J2327/02; C08J2327/12; C08J2327/16; H01M2300/00; H01M2300/0085; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
94 words
A rechargeable battery structure comprising a positive electrode element, a negative electrode element, and a separator element disposed therebetween characterized in that a) each of said elements comprises a flexible, self-supporting, polymeric matrix film composition; b) each said element is bonded to contiguous elements at its respective interfaces to form a unitary flexible laminate structure; and c) said separator element composition comprises a copolymer of vinylidene fluoride with about 8 to 20% by weight chlorotrifluoroethylene and has homogeneously distributed therein about 20 to 60% by weight of a compatible organic plasticizer for said copolymer.
Claim 2
Dependent Claim
94 words
A rechargeable battery structure comprising a positive electrode element, a negative electrode element, and a separator element disposed therebetween characterized in that a) each of said elements comprises a flexible, self-supporting, polymeric matrix film composition; b) each said element is bonded to contiguous elements at its respective interfaces to form a unitary flexible laminate structure; and c) said separator element composition comprises a copolymer of vinylidene fluoride with about 8 to 20% by weight chlorotrifluoroethylene and has homogeneously distributed therein about 20 to 60% by weight of a compatible organic plasticizer for said copolymer.
Claim 3
Dependent Claim
36 words
A rechargeable battery structure according to claim 1 wherein said separator element composition comprises about 10 to 70% by weight based on said copolymer of an inorganic filler selected from fumed alumina and silanized fumed silica.
Claim 4
Dependent Claim
29 words
A rechargeable battery structure according to claim 1 wherein said positive electrode element composition comprises a lithium intercalation compound homogeneously distributed in a matrix of said separator element composition.
Claim 5
Dependent Claim
30 words
A rechargeable battery structure according to claim 3 wherein said lithium compound has a nominal formula selected from LiMn 2 O 4 , LiCoO 2 , and LiNiO 2 .
Claim 6
Dependent Claim
24 words
A rechargeable battery structure according to claim 4 wherein said lithium compound has the formula Li 1+x Mn 2 O 4 where 0≦x ≦1.
Claim 7
Dependent Claim
42 words
A rechargeable battery structure according to claim 3 wherein said negative electrode element composition comprises a substance selected from the group consisting of lithium intercalating carbon materials and low-voltage lithium insertion compounds homogeneously distributed in a matrix of said separator element copolymer.
Claim 8
Dependent Claim
26 words
A rechargeable battery structure according to claim 6 wherein said negative electrode element composition substance is selected from the group consisting of petroleum coke and graphite.
Claim 9
Dependent Claim
24 words
A rechargeable battery structure comprising a laminate structure according to claim 1 from which at least a portion of said plasticizer has been extracted.
Claim 10
Dependent Claim
30 words
A rechargeable battery structure comprising a laminate structure according to claim 1 in which at least a portion of said plasticizer has been replaced with a lithium battery electrolyte solution.
Claim 11
Dependent Claim
116 words
A rechargeable battery structure comprising a positive current collector element, a positive electrode element, a separator element, a negative electrode element, and a negative current collector element characterized in that a) each of said collector elements comprises a flexible electrically-conductive foil, b) each of the others of said elements comprises a flexible, self-supporting, polymeric matrix film composition; c) each said element is bonded to contiguous elements at its respective interfaces to form a unitary flexible laminate structure; and d) said separator element composition comprises a copolymer of vinylidene fluoride with about 8 to 20% by weight chlorotrifluoroethylene and has homogeneously distributed therein about 20 to 60% by weight of a compatible organic plasticizer for said copolymer.
Claim 12
Dependent Claim
116 words
A rechargeable battery structure comprising a positive current collector element, a positive electrode element, a separator element, a negative electrode element, and a negative current collector element characterized in that a) each of said collector elements comprises a flexible electrically-conductive foil, b) each of the others of said elements comprises a flexible, self-supporting, polymeric matrix film composition; c) each said element is bonded to contiguous elements at its respective interfaces to form a unitary flexible laminate structure; and d) said separator element composition comprises a copolymer of vinylidene fluoride with about 8 to 20% by weight chlorotrifluoroethylene and has homogeneously distributed therein about 20 to 60% by weight of a compatible organic plasticizer for said copolymer.
Claim 13
Dependent Claim
19 words
A rechargeable battery structure according to claim 10 wherein said copolymer comprises about 10 to 15% by weight chlorotrifluoroethylene.
Claim 14
Dependent Claim
21 words
A rechargeable battery structure according to claim 10 wherein at least one of said collector element foils comprises an open-mesh grid.
Claim 15
Dependent Claim
26 words
A rechargeable battery structure according to claim 12 wherein said at least one collector element is at least partially embedded in the electrode element interfacing therewith.
References Cited (Backward Citations)
US4952466A
Cited
US5219680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-05 | 2000-05-06 | 2000-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-05 | 2004-05-06 | 2004-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-05 | 2008-05-06 | 2008-11-05 | $7700.00 | Window Closed / Lapsed |