US5219679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid electrolytes
Assignee: EIC Laboratories Inc
•
Filing: 1991-01-17
•
Granted: 1993-06-15
•
Expires: 2011-01-17
Abstract
Abstract This invention pertains to Li ion (Li + ) conductive solid polymer electrolytes composed of solvates of Li salts immobilized (encapsulated) in a solid organic polymer matrix. In particular, this invention relates to solid polymer electrolytes derived by immobilizing complexes (solvates) formed between a Li salt such as LiAsF 6 , LiCF 3 SO 3 or LiClO 4 and a mixture of aprotic organic solvents having high dielectric constants such as ethylene carbonate (EC) (dielectric constant=89.6) and propylene carbonate (PC) (dielectric constant=64.4) in a polymer matrix such as polyacrylonitrile, poly(tetraethylene glycol diacrylate), or poly(vinyl pyrrolidinone).
Inventors
- 👤 Kuzhikalail M. Abraham
- 👤 Mohamed Alamgir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:35
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
61 words
Solid electrolytes with dimensional stability at room temperature composed of solutions of alkali metal salts in a plurality of miscible aprotic organic liquids, immobilized in an organic solid polymer matrix which itself can complex with said alkali metal salts wherein said liquids are ethylene carbonate and propylene carbonate and said polymer is selected from the group consisting of polyacrylonitrile and poly-N-vinyl-2-pyrrolidinone.
Claim 2
Dependent Claim
61 words
Solid electrolytes with dimensional stability at room temperature composed of solutions of alkali metal salts in a plurality of miscible aprotic organic liquids, immobilized in an organic solid polymer matrix which itself can complex with said alkali metal salts wherein said liquids are ethylene carbonate and propylene carbonate and said polymer is selected from the group consisting of polyacrylonitrile and poly-N-vinyl-2-pyrrolidinone.
Claim 3
Dependent Claim
43 words
A solid electrolyte of claim 1 wherein said alkali metal salts are selected from the group of the low lattice energy lithium salts consisting of LiBF 4 , LiAsF 6 , LiCF 3 SO 3 , LiClO 4 , and LiPF 6 .
Claim 4
Dependent Claim
19 words
A solid electrolyte of claim 1 wherein said alkali metal salt is LiClO 4 and said polymer is polyacrylonitrile.
Claim 5
Dependent Claim
23 words
A solid-state, electric current producing rechargeable electrochemical cell comprising an alkali metal containing anode, a cathode, and a solid electrolyte of claim 1.
Claim 6
Dependent Claim
16 words
A cell of claim 4 wherein the anode is Li, Li alloy, or a Li-containing compound.
Claim 7
Dependent Claim
30 words
A cell of claim 5 wherein the alloy anode is selected from the group consisting of lithium-aluminum, lithium-tin, lithium-lead, lithium-gold, lithium-platinum, lithium-cadmium, lithium-mercury, lithium-zinc, lithium-silver, lithium-magnesium, lithium-gallium, lithium-indium, and lithium-thallium.
Claim 8
Dependent Claim
41 words
A cell of claim 5, wherein the Li-containing anode is a Li insertion compound of a transition metal oxide, a transition metal sulfide, or carbon such as Li x WO 2 , Li x TiS 2 , or Li x C.
Claim 9
Dependent Claim
30 words
A cell of claim 4 wherein the cathode is selected from the group consisting of TiS 2 , MoS 2 , V 6 O 13 , and MnO 2 .
References Cited (Backward Citations)
US4303748A
Cited
US4517265A
Cited
US4495258A
Cited
US4654279A
Cited
US4908283A
Cited
EP0279554A2
Cited
US4865932A
Cited
US4830939A
Cited
US4830939B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-06-14 | 1996-12-14 | 1997-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-06-14 | 2000-12-14 | 2001-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-06-14 | 2004-12-14 | 2005-06-15 | $7700.00 | Window Closed / Lapsed |