Patent US4601919A successfully refreshed from Google Patents.
US4601919A
Expired / Lapsed
US
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Method for preparing positive electrode for non-aqueous electrolyte cell
Assignee: FDK Twicell Co Ltd
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Filing: 1985-01-17
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Granted: 1986-07-22
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Expires: 2005-01-17
Abstract
Abstract A method for preparing a positive electrode for a non-aqueous electrolyte cell comprises applying a positive electrode-active material, an electrically conductive agent, a dispersion of polytetrafluoroethylene and a mixture of polyacrylic acid and water on one side or both sides of a supporting material, and then drying the coated supporting material at about 250° C. for 5 to 10 hours.
Inventors
- 👤 Yoshiaki Asami
- 👤 Shintaro Suzuki
- 👤 Hirotsugu Fujita
- 👤 Fumiko Homma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:23
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/06; H01M4/08; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
63 words
A method for preparing a positive electrode for a non-aqueous electrolyte cell which comprises the steps of (1) applying a mixture of positive electrode-active material, an electrically conductive agent, a dispersion of polytetrafluoroethylene, polyacrylic acid and water on one side or both sides of a supporting material, and (2) then drying said supporting material at about 250° C. for 5 to 10 hours.
Claim 2
Independent Claim
63 words
A method for preparing a positive electrode for a non-aqueous electrolyte cell which comprises the steps of (1) applying a mixture of positive electrode-active material, an electrically conductive agent, a dispersion of polytetrafluoroethylene, polyacrylic acid and water on one side or both sides of a supporting material, and (2) then drying said supporting material at about 250° C. for 5 to 10 hours.
Claim 3
Dependent Claim
31 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 1, wherein said polyacrylic acid is used in an amount of 0.1 wt. % or more.
Claim 4
Dependent Claim
29 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 2, wherein said polyacrylic acid is used in an amount of 1 wt. %.
Claim 5
Dependent Claim
59 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 1, wherein the mixing ratio of said positive electrode-active material, an electrically conductive agent, a dispersion of polytetrafluoroethylene, polyacrylic acid and water is in an amount of 40 wt. %, 5 wt. %, 1 wt. %, 1 wt. % and 53 wt. %, respectively.
Claim 6
Dependent Claim
29 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 1, wherein said positive electrode-active material is selected from manganese dioxide and carbon fluoride.
Claim 7
Dependent Claim
24 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 5, wherein said positive electrode-active material is manganese dioxide.
Claim 8
Dependent Claim
28 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 1, wherein said electrically conductive agent is selected from graphite or acetylene black.
Claim 9
Dependent Claim
23 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 7, wherein said electrically conductive agent is graphite.
Claim 10
Dependent Claim
39 words
The method for preparing a positive electrode for a non-aqueous electrolyte cell according to claim 1, wherein step (1) comprises kneading said mixture to prepare a paste and then applying said paste to a side of said supporting material.
References Cited (Backward Citations)
US2747009A
Cited
US4327166A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |