Patent US1029010A successfully refreshed from Google Patents.
Patent CH8197A successfully refreshed from Google Patents.
Patent US4386040A successfully refreshed from Google Patents.
US4386040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing lithium nickel oxide cathode for molten carbonate fuel cell
Assignee: General Electric Co
•
Filing: 1981-08-31
•
Granted: 1983-05-31
•
Expires: 2001-08-31
Abstract
Abstract A green body comprised of a mixture of nickel powder and lithium oxide is fired in air to produce a porous lithium nickel oxide structure useful as a cathode in a molten carbonate fuel cell.
Inventors
- 👤 Charles E. Baumgartner
- 👤 Kenneth P. Zarnoch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 02:38
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/14; C01G; C01G53/00; C01G53/40; C01G53/42; H; H01; H01M; H01M4/00; H01M4/86; H01M4/88; H01M4/8875; H01M4/8878; H01M4/8882; H01M4/8885; H01M4/90; H01M4/9016; C01P; C01P2002/00; C01P2002/50; C01P2004/00; C01P2004/20; C01P2004/30; C01P2004/32; C01P2004/51; C01P2004/60; C01P2004/61; C01P2006/00; C01P2006/16; C01P2006/17; C01P2006/40; C01P2006/60; H01M2004/8678; H01M2004/8689; H01M8/00; H01M8/14; H01M2008/147; H01M2300/00; H01M2300/0017; H01M2300/0048; H01M2300/0051; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
173 words
A process for producing a cathode for a molten carbonate fuel cell, said cathode being composed of Li x Ni.sub.(1-x) O where x ranges from about 0.005 to about 0.25, which consists essentially of providing a mixture of elemental nickel powder and Li 2 O or precursor thereof, said Li 2 O or precursor thereof having an average particle size not significantly larger than the average particle size of said elemental nickel powder, forming said mixture into a green body and firing said green body in air at a temperature ranging from about 600° C. to about 1000° C. producing a fired body comprised of said Li x Ni.sub.(1-x) O, said precursor of Li 2 O decomposing at or below said firing temperature to produce Li 2 O and by-product gas, said Li 2 O or precursor of Li 2 O being used in an amount sufficient to produce said Li x Ni.sub.(1-x) O, said cathode having a porosity of at least about 50% by volume of the total volume of said cathode.
Claim 2
Dependent Claim
173 words
A process for producing a cathode for a molten carbonate fuel cell, said cathode being composed of Li x Ni.sub.(1-x) O where x ranges from about 0.005 to about 0.25, which consists essentially of providing a mixture of elemental nickel powder and Li 2 O or precursor thereof, said Li 2 O or precursor thereof having an average particle size not significantly larger than the average particle size of said elemental nickel powder, forming said mixture into a green body and firing said green body in air at a temperature ranging from about 600° C. to about 1000° C. producing a fired body comprised of said Li x Ni.sub.(1-x) O, said precursor of Li 2 O decomposing at or below said firing temperature to produce Li 2 O and by-product gas, said Li 2 O or precursor of Li 2 O being used in an amount sufficient to produce said Li x Ni.sub.(1-x) O, said cathode having a porosity of at least about 50% by volume of the total volume of said cathode.
Claim 3
Dependent Claim
14 words
The process according to claim 1 wherein x has a value of about 0.02.
Claim 4
Dependent Claim
14 words
The process according to claim 1 wherein the firing temperature is about 900° C.
Claim 5
Dependent Claim
31 words
The process according to claim 1 wherein said precursor for Li 2 O is selected from the group consisting of Li 2 CO 3 , Li 2 O 2 and LiOH.
Claim 6
Dependent Claim
24 words
The process according to claim 1 wherein said nickel powder has an average particle size ranging from about 1 micron to about 5 microns.
Claim 7
Dependent Claim
29 words
The process according to claim 1 wherein said Li 2 O or precursor thereof has an average particle size smaller than the average particle size of said nickel powder.
Claim 8
Dependent Claim
64 words
The process according to claim 1 wherein said Li 2 O or precursor thereof is in the form of a solution before being mixed with said nickel powder, and wherein said solvent is evaporated from said mixture before it is formed into a green body, said solvent having no significantly deleterious effect on said nickel powder or said Li 2 O or precursor thereof.
Claim 9
Dependent Claim
26 words
The process according to claim 1 wherein said green body and said fired body is in the form of a plaque or plate with flat faces.
Claim 10
Dependent Claim
21 words
The process according to claim 8 wherein said fired plaque ranges in thickness from about 0.01 inch to about 0.1 inch.
References Cited (Backward Citations)
US3226264A
Cited
US3148056A
Cited
US3658597A
Cited
US3625765A
Cited
US3730706A
Cited
US4011052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-30 | 1986-11-29 | 1987-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-30 | 1990-11-29 | 1991-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-30 | 1994-11-29 | 1995-05-31 | $7700.00 | Window Closed / Lapsed |