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US4906539A
Expired / Lapsed
US
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Sintered type negative cadmium electrode for an alkaline storage cell and method of manufacturing the same
Assignee: Sanyo Electric Co Ltd
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Filing: 1988-07-08
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Granted: 1990-03-06
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Expires: 2008-07-08
Abstract
Abstract A rechargeable alkaline storage cell comprises, as main components thereof, a negative electrode, a positive electrode and an electrolyte. The negative electrode is formed of sintered type cadmium electrode including one of a polysaccharide and its derivative having a polymerization degree of more than 320.
Inventors
- 👤 Masayuki Terasaka
- 👤 Tukasa Itou
- 👤 Takahisa Awajitani
- 👤 Kazuhiro Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:51
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/04; H01M4/0438; H01M4/044; H01M4/0445; H01M4/24; H01M4/246; H01M4/62; H01M4/64; H01M4/70; H01M4/80; H01M4/801; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
29 words
A sintered type negative cadmium electrode for an alkaline storage cell containing at least one of a polysaccharide and its derivatives having a polymerization degree of more than 320.
Claim 2
Dependent Claim
29 words
A sintered type negative cadmium electrode for an alkaline storage cell containing at least one of a polysaccharide and its derivatives having a polymerization degree of more than 320.
Claim 3
Dependent Claim
25 words
A negative cadmium electrode as claimed in claim 1 wherein said at least one of polysaccharide and its derivatives is substantially only inside said electrode.
Claim 4
Dependent Claim
39 words
A negative cadmium electrode as claimed in claim 1 wherein said at least one of polysaccharide and its derivatives having a polymerization degree of more than 320 comprises about 0.01-0.3 wt. % of the active material of the electrode.
Claim 5
Dependent Claim
33 words
A negative cadmium electrode as claimed in claim 1, characterized in that said polysaccharide or its derivatives is selected from the group consisting of methyl cellulose, starch, pectin, carboxymethyl cellulose and hydroxypropyl cellulose.
Claim 6
Independent Claim
61 words
A method of producing a sintered type negative cadmium electrode for an alkaline storage cell comprising; a first process of manufacturing an electrode by filling a nickel sintered plaque with an active material and, a second process of adding at least one of one of a polysaccharide and its derivatives having a polymerization degree of more than 320 to said electrode.
Claim 7
Independent Claim
61 words
A method of producing a sintered type negative cadmium electrode for an alkaline storage cell comprising; a first process of manufacturing an electrode by filling a nickel sintered plaque with an active material and, a second process of adding at least one of one of a polysaccharide and its derivatives having a polymerization degree of more than 320 to said electrode.
Claim 8
Dependent Claim
23 words
A method as claimed in claim 5, characterized in that said electrode is electrochemically formed between the first process and the second process.
Claim 9
Dependent Claim
19 words
A method as claimed in claim 5, characterized in that said electrode is electrochemicaly formed after the second process.
Claim 10
Dependent Claim
37 words
A method as claimed in claim 5, characterized in that at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 is added only inside the electrode in the second process.
Claim 11
Dependent Claim
39 words
A method as claimed in claim 5, characterized in that said electrode is immersed in a solution of at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 in the second process.
Claim 12
Dependent Claim
41 words
A method as claimed in claim 5, characterized in that said second process is carried out by spraying the electrode with a solution of at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320.
Claim 13
Dependent Claim
46 words
A method as claimed in claim 5, characterized in that said second process is carried out by coating the electrode with a solution of at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 by means of a roller.
Claim 14
Dependent Claim
53 words
A method as claimed in claim 8, characterized in that one of the polysaccharide and its derivatives having a polymerization degree of more than 320 is added substantially only inside the electrode by brushing surfaces of the electrode after at least one of the polysaccharide and its derivatives is added to the electrode.
Claim 15
Dependent Claim
52 words
A method as claimed in claim 8, characterized in that at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 is added only inside the electrode by rinsing surfaces of the electrode with water after said polysaccharide and its derivatives is added to the electrode.
Claim 16
Dependent Claim
48 words
A method in claim 8, characterized in that at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 is added only inside the electrode by wiping surfaces of the electrode after said polysaccharide and its derivatives is added to the electrode.
Claim 17
Dependent Claim
66 words
A method as claimed in claim 5, characterized in that the second process comprises; a first step of allowing said electrode to hold a solvent in pores thereof, and a second step of allowing said electrode to hold in pores thereof a solution prepared by dissolving at least one of the polysaccharide and its derivatives having a polymerization degree of more than 320 in said solvent.
Claim 18
Dependent Claim
40 words
A method as claimed in claim 5, characterized in that the electrode filled with cadmium hydroxide acting as an active material is heat treated at a temperature of more than 200° C. to change the cadmium hydroxide into cadmium oxide.
Claim 19
Dependent Claim
36 words
A method as claimed in claim 5, characterized in that at least one of the polysaccharide and its derivatives is added in an amount corresponding to 0.01-0.3 wt % of the active material of the electrode.
Claim 20
Dependent Claim
31 words
A method as claimed in claim 5, characterized in that said polysaccharide and its derivatives are selected from the group consisting of methyl cellulose, starch, pectin, carboxymethyl cellulose and hydroxypropyl cellulose.
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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) | 1993-03-05 | 1993-09-04 | 1994-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-05 | 1997-09-04 | 1998-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-05 | 2001-09-04 | 2002-03-06 | $7700.00 | Window Closed / Lapsed |