US5030523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrochemical cell manufacture
Assignee: Nexeon Ltd
•
Filing: 1989-12-13
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Granted: 1991-07-09
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Expires: 2009-12-13
Abstract
Abstract A secondary electrochemical cell is made by (i) assembling a solid state electrochemical cell having an anode containing an alkali metal such as lithium as active anode material; a solid alkali metal ion conducting electrolyte, for example a polymer electrolyte comprising a complex of a solid polymer (e.g. poly(ethylene oxide)) and an alkali metal salt (e.g. LiClO 4 ), which polymer is capable of forming donor-acceptor type bonds with alkali metal ions; and a cathode containing manganese (IV) oxide as active cathode material; and (ii) discharging the cell under conditions, e.g. of elevated temperature, such that the cathode material is transformed in situ into a rechargeable cathode material which may, for example be LiMn 2 O 4 .
Inventors
- 👤 Robin J. Neat
- 👤 Raymond J. Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:01
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0565; H01M10/42; H01M4/00; H01M4/02; H01M4/13; H01M4/131; H01M4/36; H01M4/48; H01M4/485; H01M4/50; H01M4/505; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49108
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
91 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing an alkali metal as active anode material, a solid alkali metal ion conducting electrolyte, and a cathode containing manganese (IV) oxide as active cathode material; and (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. such that the cathode material is transformed in situ into a rechargeable cathode material comprising the spinel compound MMn 2 O 4 where M is alkali metal.
Claim 2
Independent Claim
91 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing an alkali metal as active anode material, a solid alkali metal ion conducting electrolyte, and a cathode containing manganese (IV) oxide as active cathode material; and (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. such that the cathode material is transformed in situ into a rechargeable cathode material comprising the spinel compound MMn 2 O 4 where M is alkali metal.
Claim 3
Dependent Claim
42 words
A method according to claim 1 wherein the electrolyte comprises a complex of a solid polymer and an alkali metal salt, which polymer is capable of forming donor-acceptor type bonds with alkali metal ions and is capable of conducting alkali metal ions.
Claim 4
Dependent Claim
22 words
A method according to claim 2 wherein the complex is a complex of a plastic macromolecular material and an alkali metal salt.
Claim 5
Dependent Claim
27 words
A method according to claim 1 wherein the cathode is constructed as a composite structure comprising manganese(IV) oxide and solid alkali metal ion conducting polymer electrolyte material.
Claim 6
Independent Claim
101 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing lithium as active anode material, an electrolyte comprising a complex of poly(ethylene oxide) and a lithium salt, and a composite cathode comprising manganese (IV) oxide, electrolyte material comprising a complex of poly(ethylene oxide) and a lithium salt, and an electronically conducting phase; (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. to convert the manganese (IV) oxide to LiMn 2 O 4 having a spinel structure; and (iii) then recharging the cell.
Claim 7
Independent Claim
101 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing lithium as active anode material, an electrolyte comprising a complex of poly(ethylene oxide) and a lithium salt, and a composite cathode comprising manganese (IV) oxide, electrolyte material comprising a complex of poly(ethylene oxide) and a lithium salt, and an electronically conducting phase; (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. to convert the manganese (IV) oxide to LiMn 2 O 4 having a spinel structure; and (iii) then recharging the cell.
Claim 8
Independent Claim
78 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing an alkali metal as active anode material, a solid alkali metal ion conducting electrolyte, and a cathode containing manganese (IV) oxide as active cathode material; and (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. such that the cathode material is transformed in situ into a rechargeable cathode material.
Claim 9
Independent Claim
78 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing an alkali metal as active anode material, a solid alkali metal ion conducting electrolyte, and a cathode containing manganese (IV) oxide as active cathode material; and (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. such that the cathode material is transformed in situ into a rechargeable cathode material.
Claim 10
Dependent Claim
41 words
A method according to claim 6 wherein the electrolyte comprises a complex of a solid polymer and alkali metal salt, which polymer is capable of forming donor-acceptor type bonds with alkali metal ions and is capable of conducting alkali metal ions.
Claim 11
Dependent Claim
22 words
A method according to claim 7 wherein the complex is a complex of a plastic macromolecular material and an alkali metal salt.
Claim 12
Dependent Claim
28 words
A method according to claim 6 wherein the cathode is constructed as a composite structure comprising manganese (IV) oxide and solid alkali metal ion conducting polymer electrolyte material.
Claim 13
Independent Claim
97 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing lithium as active anode material, an electrolyte comprising a complex of poly(ethylene oxide) and a lithium salt, and a composite cathode comprising manganese (IV) oxide, electrolyte material comprising a complex of poly(ethylene oxide) and a lithium salt, and an electronically conducting phase; (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. to convert the manganese (IV) oxide into a second manganese compound; and (iii) then recharging the cell.
Claim 14
Independent Claim
97 words
A method of making a secondary electrochemical cell comprising (i) assembling a solid state electrochemical cell having an anode containing lithium as active anode material, an electrolyte comprising a complex of poly(ethylene oxide) and a lithium salt, and a composite cathode comprising manganese (IV) oxide, electrolyte material comprising a complex of poly(ethylene oxide) and a lithium salt, and an electronically conducting phase; (ii) discharging the cell under conditions of elevated temperature in the range of 100° C. to 150° C. to convert the manganese (IV) oxide into a second manganese compound; and (iii) then recharging the 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) | 1994-07-08 | 1995-01-07 | 1995-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-08 | 1999-01-07 | 1999-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-08 | 2003-01-07 | 2003-07-09 | $7700.00 | Window Closed / Lapsed |