US4495258A
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Electrode of alkali metal compound for a secondary electrochemical cell, and a cell including such an electrode
Assignee: Alcatel Lucent SAS
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Filing: 1984-02-24
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Granted: 1985-01-22
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Expires: 2004-02-24
Abstract
Abstract The active material is constituted by an alkali metal in the zero valent state which alkali metal is inserted into an insertion compound. The insertion compound receiving the alkali metal has an ordered three-dimensional lattice structure and is constituted by at least one intermetallic compound having polyatomic anionic clusters with atoms chosen from the group constituted by gallium, boron and aluminum, and with structuring counter ions chosen from the group constituted by alkaline earth and alkali ions.
Inventors
- 👤 Alain Le Mehaute
- 👤 Claude Belin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:10
CPC Classifications
H; H01; H01M; H01M4/00; H01M4/02; H01M4/36; H01M4/38; H01M4/40; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
93 words
An electrode for a secondary electrochemical cell operating in a non-aqueous medium, wherein the active material is constituted by an alkali metal in the zero valent state which alkali metal is inserted into an insertion compound, the improvement wherein said insertion compound receiving said alkali metal has an ordered three-dimensional lattice structure and is constituted by at least one intermetallic compound having polyatomic anionic clusters with atoms chosen from the group constituted by gallium, boron and aluminum, and with structuring counter ions chosen from the group constituted by alkaline earth and alkali ions.
Claim 2
Dependent Claim
93 words
An electrode for a secondary electrochemical cell operating in a non-aqueous medium, wherein the active material is constituted by an alkali metal in the zero valent state which alkali metal is inserted into an insertion compound, the improvement wherein said insertion compound receiving said alkali metal has an ordered three-dimensional lattice structure and is constituted by at least one intermetallic compound having polyatomic anionic clusters with atoms chosen from the group constituted by gallium, boron and aluminum, and with structuring counter ions chosen from the group constituted by alkaline earth and alkali ions.
Claim 3
Dependent Claim
46 words
An electrode according to claim 1, having the formula A z M y G where: A is an alkali metal constituting the active material; M is a structural akali metal or alkaline earth; and G is chosen from gallium, boron and aluminum; where preferably 0≦z≦6 0.05≦y≦2.
Claim 4
Dependent Claim
19 words
An electrode according to claim 2, wherein G is gallium, and M is chosen from Li, Na and K.
Claim 5
Dependent Claim
47 words
An electrode according to claim 3, wherein the intermetallic cluster compound has a formula chosen from the group constituted by: K 0 .23 Ga, Li 0 .21 Ga, Li 2 Ga, Na 0 .25 Ga, Li 1 .5 Ga, Li 1 .25 Ga, Na 0 .56 Ga.
Claim 6
Dependent Claim
13 words
An electrode according to claim 1, wherein the intermetallic cluster compound is heteroatomic.
Claim 7
Dependent Claim
17 words
An electrode according to claim 5, wherein the intermetallic cluster compound is based on boron and gallium.
Claim 8
Dependent Claim
17 words
An electrode according to claim 5, wherein the intermetallic cluster compound is based on aluminum and gallium.
Claim 9
Dependent Claim
21 words
An electrode according to claim 1, wherein the structural ions comprise a mixture of alkali ions and of alkaline earth ions.
Claim 10
Dependent Claim
25 words
A secondary electrochemical cell operating in a non-aqueous medium and including a positive electrode, an electrolyte, and a negative electrode as defined in claim 1.
Claim 11
Dependent Claim
56 words
A cell according to claim 9, wherein the positive electrode includes a compound chosen from the group constituted by: Li z FeS 2 , Li z NiPS 3 , or Li z TiS 2 , where 0<z<4; a compound such as Li y MnO 2 where y≦1; sulfur; polysulfides; SO 2 ; and SOCl 2 .
Claim 12
Dependent Claim
16 words
A cell according to claim 9, wherein the electrolyte comprises dioxolane including lithium perchlorate in solution.
Claim 13
Dependent Claim
22 words
A cell according to claim 9, wherein the electrolyte is a solid electrolyte based on polyoxyethylene with a carrier salt dissolved therein.
Claim 14
Dependent Claim
23 words
A cell according to claim 9, wherein the electrolyte is chosen from the group constituted by liquid SOCl 2 and SO 2 .
Claim 15
Dependent Claim
20 words
A cell according to claim 9, wherein the electrolyte comprises a molten salt such as a mixture of alkaline chlorides.
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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |