US4297231A
Expired / Lapsed
US
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Process for producing a positive electrode for a non-aqueous electrolytic cell
Assignee: Hitachi Ltd
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Filing: 1979-12-28
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Granted: 1981-10-27
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Expires: 1999-12-28
Abstract
Abstract Disclosed is a process for producing a positive electrode for a non-aqueous electrolytic cell. Manganese dioxide is heat-treated at a temperature between 250° and 400° C. The heat-treated manganese dioxide is next mixed with a conducting agent and binder. The binder is suspended in water by means of non-ionic surface active agent, and the mixture is heat-treated at a temperature between 180° and 350° C. and then pressured molded into a positive electrode. This production process allows the provision of a positive electrode for a non-aqueous electrolytic cell of excellent discharge characteristics.
Inventors
- 👤 Toshiki Kahara
- 👤 Kohki Tamura
- 👤 Noboru Ebata
- 👤 Fumio Sato
- 👤 Tomio Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:14
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/50; H01M4/502; H01M4/06; H01M4/08; H01M6/00; H01M6/14; H01M6/16; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
55 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) heat-treating manganese dioxide; (b) adding the thus heat-treated manganese dioxide with a conducting agent and a binder to be mixed together; (c) heat-treating the resultant mixture; and (d) molding the thus heat-treated mixture to form a positive electrode.
Claim 2
Dependent Claim
55 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) heat-treating manganese dioxide; (b) adding the thus heat-treated manganese dioxide with a conducting agent and a binder to be mixed together; (c) heat-treating the resultant mixture; and (d) molding the thus heat-treated mixture to form a positive electrode.
Claim 3
Dependent Claim
21 words
A process according to claim 1, wherein said binder is suspended in a dispersion medium by means of a dispersing agent.
Claim 4
Dependent Claim
42 words
A process according to claim 1 or 2, wherein said binder comprises fine powders of a fluorine-containing resin and said fine powders of said fluorine-containing resin are suspended in water or an organic solvent by means of a non-ionic surface active agent.
Claim 5
Dependent Claim
48 words
A process according to claim 1 or 2, wherein the heat treatment temperature of said manganese dioxide ranges from 250° to 400° C., preferably 350° to 375° C., and wherein the heat treatment temperature of said mixture ranges from 180° to 350° C., preferably 220° to 300° C.
Claim 6
Dependent Claim
48 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) adding manganese dioxide with a conductive agent and a binder to be mixed together; (b) heat-treating the resultant mixture; and (c) molding the thus heat-treated mixture to form a positive electrode.
Claim 7
Dependent Claim
48 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) adding manganese dioxide with a conductive agent and a binder to be mixed together; (b) heat-treating the resultant mixture; and (c) molding the thus heat-treated mixture to form a positive electrode.
Claim 8
Dependent Claim
21 words
A process according to claim 5, wherein said binder is suspended in a dispersion medium by means of a dispersing agent.
Claim 9
Dependent Claim
42 words
A process according to claim 5 or 6, wherein said binder comprises fine powders of a fluorine-containing resin and said fine powders of said fluorine-containing resin are suspended in water or an organic solvent by menas of a non-ionic surface active agent.
Claim 10
Dependent Claim
27 words
A process according to claim 5 or 6, wherein the heat treatment temperature of said mixture ranges from 220° to 350° C., preferably 300° to 350° C.
Claim 11
Dependent Claim
90 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) heating manganese dioxide at a temperature of 300° C. for 3 hours; (b) adding the thus heated manganese dioxide with acetylene black and a suspension of fine powders of polytetrafluoroethylene dispersed in water by a non-ionic surface active agent to be mixed together; (c) heating the resultant mixture at 270° C. for 20 minutes; and (d) molding the thus heated mixture at a pressure of 3,000 kg/cm 2 to form a positive electrode.
Claim 12
Dependent Claim
90 words
A process for producing a positive electrode for a non-aqueous electrolytic cell comprising the steps of: (a) heating manganese dioxide at a temperature of 300° C. for 3 hours; (b) adding the thus heated manganese dioxide with acetylene black and a suspension of fine powders of polytetrafluoroethylene dispersed in water by a non-ionic surface active agent to be mixed together; (c) heating the resultant mixture at 270° C. for 20 minutes; and (d) molding the thus heated mixture at a pressure of 3,000 kg/cm 2 to form a positive electrode.
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |