US4957833A
Expired / Lapsed
US
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Non-aqueous liquid electrolyte cell
Assignee: Bridgestone Corp
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Filing: 1989-12-05
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Granted: 1990-09-18
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Expires: 2009-12-05
Abstract
Abstract A non-aqueous liquid electrolyte cell comprising a positive electrode having an active material of conductive organic polymer, typically polyaniline on a support, a negative electrode having an active material of lithium or lithium alloy, and a non-aqueous electrolyte solution exhibits improved performance when the electrolyte solution contains an electrolyte in a non-aqueous solvent mixture of a non-cyclic carbonate and a cyclic carbonate.
Inventors
- 👤 Hideharu Daifuku
- 👤 Takashi Kitamura
- 👤 Takahiro Kawagoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:02
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/056; H01M10/0564; H01M10/0566; H01M10/0569; H01M4/00; H01M4/02; H01M4/36; H01M4/60; H01M4/64; H01M4/66; H01M4/669; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
56 words
A non-aqueous liquid electrolyte cell comprising a positive electrode having an electroconductive organic polymer as a positive electrode active material, a negative electrode having lithium or a lithium alloy as a negative electrode active material, and a non-aqueous electrolyte solution containing an electrolyte in a non-aqueous solvent mixture of a non-cyclic carbonate and a cyclic carbonate.
Claim 2
Dependent Claim
56 words
A non-aqueous liquid electrolyte cell comprising a positive electrode having an electroconductive organic polymer as a positive electrode active material, a negative electrode having lithium or a lithium alloy as a negative electrode active material, and a non-aqueous electrolyte solution containing an electrolyte in a non-aqueous solvent mixture of a non-cyclic carbonate and a cyclic carbonate.
Claim 3
Dependent Claim
33 words
The cell of claim 1 wherein said electrolyte is selected from the group consisting of LiBF 4 , LiClO 4 , LiPF 6 , LiCF 3 SO 3 , and LiAsF 6 .
Claim 4
Dependent Claim
13 words
The cell of claim 1 or 2 which is a rechargeable secondary cell.
Claim 5
Dependent Claim
13 words
The cell of claim 1 wherein the electroconductive organic polymer comprises a polyaniline.
Claim 6
Dependent Claim
30 words
The cell of claim 1 wherein said non-cyclic carbonate is selected from the group consisting of dimethyl carbonate, diethyl carbonate, dipropyl carbonate, dibutyl carbonate, diphenyl carbonate, and a mixture thereof.
Claim 7
Dependent Claim
28 words
The cell of claim 1 or 5 wherein said cyclic carbonate is selected from the group consisting of ethylene carbonate, propylene carbonate, butylene carbonate, and a mixture thereof.
Claim 8
Dependent Claim
22 words
The cell of claim 1 wherein the proportion of non-cyclic carbonate to cyclic carbonate ranges from 1/5 to 5/1 in weight ratio.
Claim 9
Dependent Claim
51 words
The cell of claim 1 wherein the positive electrode includes a member disposed in direct or indirect contact with the positive electrode active material, said member being of a stainless steel having a chromium content of at least 16% by weight and a molybdenum content of at least 0.5% by weight.
Claim 10
Dependent Claim
51 words
The cell of claim 1 wherein the positive electrode includes a member disposed in direct or indirect contact with the positive electrode active material, said member being of a stainless steel having a chromium content of at least 16% by weight and a nickel content of less than 5% by weight.
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) | 1993-09-17 | 1994-03-19 | 1994-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-17 | 1998-03-19 | 1998-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-17 | 2002-03-19 | 2002-09-18 | $7700.00 | Window Closed / Lapsed |