US5389467A
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Rechargeable galvanic lithium cell
Assignee: NBT GmbH
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Filing: 1994-05-11
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Granted: 1995-02-14
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Expires: 2014-05-11
Abstract
Abstract Nontoxic, chemically stable lithium tris(fluorosulphonyl)methanide, LiC(SO 2 F) 3 , is used as a conducting salt for rechargeable lithium cells containing nonaqueous electrolytes based on esters or polymeric electrolytes such as polyethylene oxide. The cell electrolyte is preferably comprised of an approximately 1 molar solution of the salt in a mixture of 50% by volume of ethylene carbonate (EC) and 50% by volume of diethyl carbonate (DEC).
Inventors
- 👤 Rudolf Herr
- 👤 Hans-Walter Praas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:36
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0568; H01M10/0565; H01M10/0569; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M2300/0028; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40; H01M4/405; H01M4/48; H01M4/50; H01M4/505; H01M4/58; H01M4/583; H01M4/587; H01M4/60; H01M4/602; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
35 words
A rechargeable galvanic lithium cell having a negative electrode, a positive electrode and an electrolyte comprised of a mixture of lithium tris(fluorosulphonyl)methanide, LiC(SO 2 F) 3 , dissolved in organic solvents or in organic polymers.
Claim 2
Dependent Claim
35 words
A rechargeable galvanic lithium cell having a negative electrode, a positive electrode and an electrolyte comprised of a mixture of lithium tris(fluorosulphonyl)methanide, LiC(SO 2 F) 3 , dissolved in organic solvents or in organic polymers.
Claim 3
Dependent Claim
14 words
The rechargeable galvanic lithium cell of claim 1 wherein the organic solvents are esters.
Claim 4
Dependent Claim
40 words
The rechargeable galvanic lithium cell of claim 2 wherein the solvent mixture is comprised of ethylene carbonate (EC) and at least one further ester selected from the group consisting of propylene carbonate (PC), diethyl carbonate (DEC) and dimethyl carbonate (DMC).
Claim 5
Dependent Claim
28 words
The rechargeable galvanic lithium cell of claim 3 wherein the ethylene carbonate is present in the solvent mixture in an amount of from 30 to 70% by volume.
Claim 6
Dependent Claim
23 words
The rechargeable galvanic lithium cell of claim 4 wherein the amount of ethylene carbonate in the solvent mixture is approximately 50% by volume.
Claim 7
Dependent Claim
27 words
The rechargeable galvanic lithium cell of claim 3 wherein the LiC(SO 2 F) 3 has a concentration in the solvent mixture of from 0.6 to 1.3 molar.
Claim 8
Dependent Claim
15 words
The rechargeable galvanic lithium cell of claim 6 wherein the concentration is about 1 molar.
Claim 9
Dependent Claim
16 words
The rechargeable galvanic lithium cell of claim 1 wherein the negative electrode is a lithium electrode.
Claim 10
Dependent Claim
17 words
The rechargeable galvanic lithium cell of claim 1 wherein the negative electrode is a lithium alloy electrode.
Claim 11
Dependent Claim
17 words
The rechargeable galvanic lithium cell of claim 1 wherein the negative electrode is a lithium-intercalating carbon electrode.
Claim 12
Dependent Claim
38 words
The rechargeable galvanic lithium cell of claim 1 wherein the positive electrode is a metal oxide electrode selected from the group of metal oxides consisting of CoO 2 , mixed oxides of cobalt and nickel, and manganese oxides.
Claim 13
Dependent Claim
17 words
The rechargeable galvanic lithium cell of claim 11 wherein the positive electrode is a lithium-intercalating metal-oxide electrode.
Claim 14
Dependent Claim
18 words
The rechargeable galvanic lithium cell of claim 11 wherein the positive electrode is a lithium-intercalating manganese spinel electrode.
Claim 15
Dependent Claim
18 words
The rechargeable galvanic lithium cell of claim 1 wherein the positive electrode is comprised of a conductive polymer.
Claim 16
Dependent Claim
18 words
The rechargeable galvanic lithium cell of claim 1 wherein the negative electrode is comprised of a conductive polymer.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-02-13 | 1998-08-15 | 1999-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-13 | 2002-08-15 | 2003-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-13 | 2006-08-15 | 2007-02-14 | $7700.00 | Window Closed / Lapsed |