US4158722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High energy electrochemical current source
Assignee: VARTA Batterie AG
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Filing: 1978-05-31
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Granted: 1979-06-19
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Expires: 1998-05-31
Abstract
Abstract In a galvanic element having a negative metal electrode, and non-aqueous electrolyte, the electrochemically reducible component of the positive electrode mass is a chromium oxide of the formula CrO x , where x lies in the range between 2 and 2.9.
Inventors
- 👤 Helmut Lauck
- 👤 Franz-Josef Kruger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:28
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M4/00; H01M4/02; H01M4/36; H01M4/48; H01M4/483
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
A galvanic element having a negative metal electrode selected from the group of lithium, calcium, sodium, magnesium, aluminum, zinc, or alloys thereof, a non-aqueous electrolyte, and a positive metal oxide electrode wherein the electrochemically reducible component of the positive electrode mass is chromium oxide of the formula CrO x in which x is in the range between 2 and 2.9.
Claim 2
Dependent Claim
60 words
A galvanic element having a negative metal electrode selected from the group of lithium, calcium, sodium, magnesium, aluminum, zinc, or alloys thereof, a non-aqueous electrolyte, and a positive metal oxide electrode wherein the electrochemically reducible component of the positive electrode mass is chromium oxide of the formula CrO x in which x is in the range between 2 and 2.9.
Claim 3
Dependent Claim
35 words
The element of claim 1 wherein the electrochemically reducible component of the positive electrode mass is a chromium oxide of the formula CrO x in which x is in the range between 2.4 and 2.6.
Claim 4
Dependent Claim
26 words
The element of claim 1 wherein the chromium oxide is present in mixture with another metal oxide whose oxidation potential approximates that of the chromium oxide.
Claim 5
Dependent Claim
13 words
The element of claim 3 wherein the other oxide is MnO 2 .
Claim 6
Dependent Claim
55 words
The element of claim 1 wherein the electrolyte consists of an approximately 1 molar solution of a complex conductive salt selected from the group consisting of MBF 4 , MClO 4 or MM'F 6 , where M = Li, Na, K and M' = P, As, Sb, in a mixture of propylene carbonate and dimethoxyethane.
Claim 7
Dependent Claim
12 words
The element of claim 5 wherein the salt is LiClO 4 .
Claim 8
Dependent Claim
12 words
The element of claim 5 wherein the salt is LiAsF 6 .
Claim 9
Dependent Claim
28 words
The element of claim 1 wherein the positive electrode mass is mixed with approximately 0.5% by weight of carbon black and about 0.5% by weight of binding agent.
Claim 10
Dependent Claim
11 words
The element of claim 8 wherein the binding agent is polytetrafluoroethylene.
Claim 11
Dependent Claim
12 words
The element of claim 1 wherein the negative electrode is of lithium.
Claim 12
Dependent Claim
23 words
The element of claim 1 wherein the chromiun oxide has been produced by thermal decomposition of chromium (VI) oxide in an oxygen stream.
Claim 13
Dependent Claim
30 words
The element of claim 11 wherein the decomposition was performed heating chromium (VI) oxide for about one hour, in a glass tube through which oxygen is piped, at 340° C.
Claim 14
Dependent Claim
39 words
The element of claim 1 wherein the positive electrode also includes in mixture with the CrO x , MnO 2 or PbO 2 , the CrO x being present in the mixture in a molar content greater than 50%.
References Cited (Backward Citations)
US3873369A
Cited
US3998658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-18 | 1982-12-18 | 1983-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-18 | 1986-12-18 | 1987-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-18 | 1990-12-18 | 1991-06-19 | $7700.00 | Window Closed / Lapsed |