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US4906538A
Expired / Lapsed
US
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Non-aqueous secondary cell
Assignee: Bridgestone Corp
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Filing: 1988-03-18
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Granted: 1990-03-06
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Expires: 2008-03-18
Abstract
Abstract A non-aqueous secondary cell comprising a positive electrode, a negative electrode and a non-aqueous electrolyte is provided wherein the positive electrode comprises as an active material polyaniline containing 15 to 30% by weight of BF 4 .
Inventors
- 👤 Shinichi Toyosawa
- 👤 Shigeru Kijima
- 👤 Hideharu Daifuku
- 👤 Yuko Maeda
- 👤 Katsuhiko Arai
- 👤 Takahiro Kawagoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:50
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; C; C08; C08G; C08G73/00; C08G73/02; C08G73/026; C08G73/0266; H01M4/00; H01M4/02; H01M4/04; H01M4/0438; H01M4/0464; H01M4/0466; H01M4/36; H01M4/60; H01M4/602; H01M4/64; H01M4/70; H01M4/72; H01M4/74; H01M4/742; H01M2004/026; H01M2004/028; H01M2300/00; H01M2300/0017; H01M2300/0025; H01M4/66; H01M4/661; H01M4/663; H01M4/669; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
71 words
A non-aqueous secondary cell comprising a positive electrode, a negative electrode and an non-aqueous electrolyte solution, wherein the positive electrode comprises as an active material polyaniline film which has been purified by continuously passing 2 to 20 ml/cm 2 of water per 1 mm thickness of the polyaniline film through the film in a thickness direction thereof at a flow rate of 0.1 to 10 ml/cm 2 min to remove impurities.
Claim 2
Dependent Claim
71 words
A non-aqueous secondary cell comprising a positive electrode, a negative electrode and an non-aqueous electrolyte solution, wherein the positive electrode comprises as an active material polyaniline film which has been purified by continuously passing 2 to 20 ml/cm 2 of water per 1 mm thickness of the polyaniline film through the film in a thickness direction thereof at a flow rate of 0.1 to 10 ml/cm 2 min to remove impurities.
Claim 3
Dependent Claim
17 words
The cell of claim 1 wherein the polyaniline film is deposited on a planar network electroconductive material.
Claim 4
Dependent Claim
16 words
The cell of claim 2 wherein the planar network electroconductive material is a stainless steel mesh.
Claim 5
Dependent Claim
69 words
The cell of claim 1 wherein said polyaniline is prepared by immersing a polymerization electrode and a counter electrode comprising a plurality of spaced-apart segments in an electrolytic polymerization solution in an electrolysis tank, and conducting electricity across the electrodes to carry out electrolytic polymerization to deposit a polyaniline film on the polymerization electrode while independently controlling the current or voltage applied to the plurality of counter electrode segments.
Claim 6
Dependent Claim
20 words
The cell of claim 4 wherein a shield partition is disposed between two adjoining ones of the counter electrode segments.
Claim 7
Dependent Claim
24 words
The cell of claim 1 wherein the negative electrode comprises as an active material a lithium-aluminum alloy containing 25 to 65 atom% of lithium.
Claim 8
Dependent Claim
41 words
The cell of claim 1 wherein said electrolyte solution comprises a mixture of 35 to 65% by volume of propylene carbonate and the balance of dimethoxyethane having dissolved therein from more than 1 mol/liter to 3 mol/liter of LiBF 4 .
Claim 9
Dependent Claim
23 words
The cell of claim 1, wherein said polyaniline film has been purified by passing water through the film under super- or sub-atmospheric pressure.
Claim 10
Dependent Claim
42 words
The cell of claim 1, wherein the polyaniline film is washed with water such that when 1 gram of polyaniline is extracted with 200 ml of water, the extract water has an equilibrium pH in the range of from 2.4 to 4.
Claim 11
Dependent Claim
25 words
The cell of claim 1, wherein the polyaniline film which has been washed with water contains 15% to 30% by weight of BF 4 .
References Cited (Backward Citations)
US4740436A
Cited
US4717634A
Cited
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 |