US4206271A
Expired / Lapsed
US
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Method of manufacturing highly porous electrode bodies for electrical accumulators and electrode bodies thus obtained
Assignee: Nife Jungner AB
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Filing: 1979-03-13
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Granted: 1980-06-03
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Expires: 1999-03-13
Abstract
Abstract A method is disclosed for the manufacture of a highly porous nickel electrode body for electrical accumulators. The new electrode body is also disclosed. By using 5-7% by volume of a nickel powder in admixture with 93-95% by volume of a pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate when pressing and sintering the electrode body a very high porosity is obtained, such as 90-95%, in spite of which the mechanical strength of the body is so high as to resist the strains of an accumulator cell. Especially preferable to impart outstanding strength to the electrode body, is a pressure of at least 100 MPa in the pressing operation.
Inventors
- 👤 Sten B. C. Norling
- 👤 Lars H. Swenne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:42
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1121; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/80; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
67 words
A method of manufacturing highly porous electrode bodies for electrical accumulators, which comprises: (a) mixing into an intimate mixture 5-7% by volume of a nickel powder with 93-95% by volume of a powdered pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate; (b) pressing the mixture into a compacted body; and (c) sintering the compacted body to form said highly porous electrode body.
Claim 2
Independent Claim
67 words
A method of manufacturing highly porous electrode bodies for electrical accumulators, which comprises: (a) mixing into an intimate mixture 5-7% by volume of a nickel powder with 93-95% by volume of a powdered pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate; (b) pressing the mixture into a compacted body; and (c) sintering the compacted body to form said highly porous electrode body.
Claim 3
Dependent Claim
21 words
A method as claimed in claim 1, wherein the mixture is pressed with a mold pressure of at least 100 MPa.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 2, wherein 5-6% by volume of the nickel powder is mixed with 94-95% by volume of the pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate.
Claim 5
Dependent Claim
22 words
A method as claimed in claim 2, wherein the compacted body is sintered at a temperature within the range of 1000°-1100° C.
Claim 6
Dependent Claim
30 words
A method as claimed in claim 2, wherein the particle size of the pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate is above 0.3 millimeters.
Claim 7
Dependent Claim
20 words
A method as claimed in claim 2, wherein the mixture is pressed into a compacted body on a conductive support.
Claim 8
Dependent Claim
65 words
Highly porous electrode bodies for electrical accumulators, which are obtained by: (a) mixing into an intimate mixture 5-7% by volume of a nickel powder with 93-95% by volume of a powdered pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate; (b) pressing the mixture into a compacted body; and (c) sintering the compacted body to form said highly porous electrode body.
Claim 9
Dependent Claim
65 words
Highly porous electrode bodies for electrical accumulators, which are obtained by: (a) mixing into an intimate mixture 5-7% by volume of a nickel powder with 93-95% by volume of a powdered pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate; (b) pressing the mixture into a compacted body; and (c) sintering the compacted body to form said highly porous electrode body.
Claim 10
Dependent Claim
21 words
Electrode bodies as claimed in claim 7, wherein the mixture is pressed with a mold pressure of at least 100 MPa.
Claim 11
Dependent Claim
36 words
Electrode bodies as claimed in claim 8, wherein 5-6% by volume of the nickel powder is mixed with 94-95% by volume of the pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate.
Claim 12
Dependent Claim
22 words
Electrode bodies as claimed in claim 8, wherein the compacted body is sintered at a temperature within the range of 1000°-1100° C.
Claim 13
Dependent Claim
30 words
Electrode bodies as claimed in claim 8, wherein the particle size of the pore-forming agent selected from the group consisting of ammonium bicarbonate and ammonium carbonate is above 0.3 millimeters.
Claim 14
Dependent Claim
20 words
Electrode bodies as claimed in claim 8, wherein the mixture is pressed into a compacted body on a conductive support.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-06-03 | 1983-12-03 | 1984-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-03 | 1987-12-03 | 1988-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-03 | 1991-12-03 | 1992-06-03 | $7700.00 | Window Closed / Lapsed |