US5017444A
Expired / Lapsed
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Lithium cell
Assignee: Mitsubishi Chemical Corp
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Filing: 1990-08-31
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Granted: 1991-05-21
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Expires: 2010-08-31
Abstract
Abstract A lithium cell comprising a negative pole made of lithium and a positive pole made of a vanadium fluoride-graphite intercalation compound of the formula CxVF6 wherein x is from 8.0 to 80.
Inventors
- 👤 Tsuyoshi Nakajima
- 👤 Rachid Yazami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:34
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/58; H01M4/583; C; C01; C01B; C01B32/00; C01B32/20; C01B32/21; C01B32/22; H01M10/00; H01M10/05; H01M10/052; H01M4/5835; H01M6/00; H01M6/14; H01M6/16; H01M10/056; H01M10/0564; H01M10/0565; H01M10/058; H01M10/0587; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
35 words
A lithium cell comprising a negative pole made of lithium and a positive pole made of a vanadium fluoride-graphite intercalculation compound of the formula C x VF 6 wherein x is from 8.0 to 80.
Claim 2
Dependent Claim
35 words
A lithium cell comprising a negative pole made of lithium and a positive pole made of a vanadium fluoride-graphite intercalculation compound of the formula C x VF 6 wherein x is from 8.0 to 80.
Claim 3
Dependent Claim
14 words
The lithium cell according to claim 1, wherein x is from 8.0 to 20.
Claim 4
Dependent Claim
21 words
The lithium cell according to claim 1, wherein the intercalculation compound is obtained by reacting vanadium pentafluoride to a carbon material.
Claim 5
Dependent Claim
32 words
The lithium cell according to claim 3, wherein the carbon material is natural graphite, petroleum coke, pitch coke, petroleum coke or pitch coke graphitized by heat treatment, pyrolytic graphite, or carbon fiber.
Claim 6
Dependent Claim
22 words
The lithium cell according to claim 1, wherein the negative pole is made of simple substance of lithium or a lithium alloy.
Claim 7
Dependent Claim
68 words
A lithium cell comprising a negative pole, a positive pole, an electrolyte and a separator to prevent electronic short circuiting between the positive pole and the negative pole, wherein the negative pole is made essentially of lithium or a lithium alloy, and the positive pole is made essentially of a vanadium fluoride-graphite intercalation compound of the formula C x VF 6 wherein x is from 8.0 to 80.
Claim 8
Dependent Claim
68 words
A lithium cell comprising a negative pole, a positive pole, an electrolyte and a separator to prevent electronic short circuiting between the positive pole and the negative pole, wherein the negative pole is made essentially of lithium or a lithium alloy, and the positive pole is made essentially of a vanadium fluoride-graphite intercalation compound of the formula C x VF 6 wherein x is from 8.0 to 80.
Claim 9
Dependent Claim
27 words
The lithium cell according to claim 6, wherein the electrolyte is an organic electrolyte having an alkali metal salt as a solute dissolved in an organic solvent.
Claim 10
Dependent Claim
17 words
The lithium cell according to claim 6, wherein the electrolyte is a solid electrolyte of polyethylene oxide.
Claim 11
Dependent Claim
14 words
The lithium cell according to claim 6, wherein the separator is a porous material.
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) | 1994-05-20 | 1994-11-19 | 1995-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-20 | 1998-11-19 | 1999-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-20 | 2002-11-19 | 2003-05-21 | $7700.00 | Window Closed / Lapsed |