Patent EP0396324A2 successfully refreshed from Google Patents.
EP0396324A2
Expired / Lapsed
EP
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Cells
Assignee: MHB Joint Venture
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Filing: 1990-04-26
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Granted: —
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Expires: 2010-04-26
Abstract
Abstract A solid state electrochemical laminar single cell having an alkali metal anode, a solid ionically conducting electrolyte, a composite cathode, and a current collector is described. The electrolyte is interposed between the alkali metal anode and the cathode. The cathode is interposed between the electrolyte and the current collector. The cell is capable of generating a discharge current per unit area greater than or equal to 50 milliamperes/cm² at room temperature. A process for producing the cell is also disclosed.
Inventors
- 👤 Dale Richard Shackle
- 👤 Denis Gaston Fauteux
- 👤 Jorgen S. Lundsgaard
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 10:27
CPC Classifications
H; H01; H01M; H01M10/00; H01M10/05; H01M10/052; H01M10/056; H01M10/0564; H01M10/0565; H01M4/00; H01M4/02; H01M4/62; H01M4/621; H01M4/64; H01M4/66; H01M4/661; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02P; Y02P70/00; Y02P70/50
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
76 words
A solid state electrochemical laminar single cell comprising an alkali metal anode, a solid ionically conductive electrolyte, a composite cathode, and a current collector; characterised in that said electrolyte is interposed between said alkali metal anode and said cathode, and said cathode is interposed between said electrolyte and said current collector; and in that said cell is capable of generating a discharge current per unit area greater than or equal to 50 milliamps/cm² at room temperature.
Claim 2
Dependent Claim
76 words
A solid state electrochemical laminar single cell comprising an alkali metal anode, a solid ionically conductive electrolyte, a composite cathode, and a current collector; characterised in that said electrolyte is interposed between said alkali metal anode and said cathode, and said cathode is interposed between said electrolyte and said current collector; and in that said cell is capable of generating a discharge current per unit area greater than or equal to 50 milliamps/cm² at room temperature.
Claim 3
Dependent Claim
28 words
A cell according to Claim 1, further characterised in that said composite cathode comprises an active cathode material, an electrically conductive filler and an ionically conductive solid electrolyte.
Claim 4
Dependent Claim
21 words
A cell according to Claim 2, further characterised in that said active cathode material is a transition metal oxide or sulphide.
Claim 5
Dependent Claim
24 words
A cell according to Claim 3, further characterised in that said active cathode material includes V₆O₁₃ and said electrically conductive filler includes carbon black.
Claim 6
Dependent Claim
29 words
A cell according to Claim 4, further characterised in that the ratio of V₆O₁₃ to carbon black ranges from about 5 to 1 to 10 to 1 by weight.
Claim 7
Dependent Claim
23 words
A cell according to Claims 4 or 5, further characterised in that the average particle size of V₆O₁₃ is less than 5 microns.
Claim 8
Dependent Claim
27 words
A cell according to any of Claims 2 to 6, further characterised in that the impedance of said cathode is less than 50 ohms per square centimetre.
Claim 9
Dependent Claim
28 words
A cell according to any of Claims 2 to 7, further characterised in that the thickness of said cathode ranges from about 50 microns to about 100 microns.
Claim 10
Dependent Claim
31 words
A cell according to any preceding claim, further characterised in that said electrolyte comprises a polymer which is ionically conductive or non-conductive and a solution of an ionizable alkali metal salt.
Claim 11
Dependent Claim
79 words
A cell according to Claim 9, further characterised in that said polymer is prepared from one or more of the radiation polymerizable compounds represented by the formulae (I), (II) and (III); A (̵CH₂- H-O)̵ n A (I) A (̵CH₂-CH₂- )̵ n A (II) A (̵CH₂- -CH₂)̵ n A (III) where n is about 3 to 50, R is hydrogen or a C1-C3 alkyl group, and which compounds are terminated by ethylenically unsaturated moieties or glycidyl moieties represented by A.
Claim 12
Dependent Claim
54 words
A cell according to Claims 9 or 10, further characterised in that said salt is a salt of a cation selected from Li⁺, Na⁺, K⁺, Mg²⁺, Ca²⁺, and NH₄⁺, and an anion selected from I-, ClO₄-, BF₄-, AsF₆-,CF₃SO₃-, CF₃CO₃-, B₁₂H₁₂²-, B₁₀Cl₁₀²-, and Bφ₄, where φ is C₆H₅, an alkyl chain or an aryl chain.
Claim 13
Dependent Claim
34 words
A cell according to Claim 11, further characterised in that said salt includes LiAsF₆, and in that the amount of LiAsF₆ in said electrolyte ranges between 6 and 24% by weight of said electrolyte.
Claim 14
Dependent Claim
31 words
A cell according to any of Claims 9 to 12, further characterised in that said polymer and said solution of said salt forming said electrolyte are present as a single phase.
Claim 15
Dependent Claim
23 words
A cell according to any preceding claim, further characterised in that the thickness of said electrolyte is about 5 to about 25 microns.
Claim 16
Dependent Claim
20 words
A cell according to Claim 14, further characterised in that the impedance of said electrolyte is less than 300 ohm-cm.
Claim 17
Dependent Claim
38 words
A cell according to Claim 13, or any claim appendant thereto, further characterised in that the impedance per unit area at the interface of said anode and said electrolyte is less than about 100 ohms per square centimetre.
Claim 18
Dependent Claim
38 words
A cell according to Claim 13, or any claim appendant thereto, further characterised in that the impedance per unit area at the interface of said electrolyte and said cathode is less than about 25 ohms per square centimetre.
Claim 19
Dependent Claim
39 words
A cell according to Claim 13 or any claim appendant thereto, further characterised in that the impedance per unit area at the interface of said cathode and said current collector is less than about 5 ohms per square centimetre.
Claim 20
Dependent Claim
15 words
A cell according to any preceding claim, further characterised in that said anode is lithium.
Claim 21
Dependent Claim
30 words
A cell according to any of Claims 1 to 18, further characterised in that said anode is a lithium alloy selected from Li-Al, Li-Si, Li-Sn, Li-Cd, Li-Zn, Li-Pb and Li-N.
Claim 22
Dependent Claim
28 words
A cell according to any preceding claim, further characterised in that said current collector is a nickel foil having particles of nickel electrochemically deposited on the surface thereof.
Claim 23
Dependent Claim
118 words
A process for making a solid state alkali metal cell capable of generating a discharge current per unit area greater than or equal to 50 milliamperes per square centimetre at room temperature, characterised in comprising the steps of: coating a cathode composition layer comprising an active cathode material, an electrically conductive filler material, an alkali metal salt, an inert liquid solvent for said salt and a polymerizable material on to a current collector layer; coating an ionically conductive, polymerizable electrolyte composition layer on to said cathode composition layer; partially or totally curing said cathode composition and said electrolyte composition; and applying an alkali metal anode composition layer on to said electrolyte composition layer to form a cell assembly.
Claim 24
Dependent Claim
118 words
A process for making a solid state alkali metal cell capable of generating a discharge current per unit area greater than or equal to 50 milliamperes per square centimetre at room temperature, characterised in comprising the steps of: coating a cathode composition layer comprising an active cathode material, an electrically conductive filler material, an alkali metal salt, an inert liquid solvent for said salt and a polymerizable material on to a current collector layer; coating an ionically conductive, polymerizable electrolyte composition layer on to said cathode composition layer; partially or totally curing said cathode composition and said electrolyte composition; and applying an alkali metal anode composition layer on to said electrolyte composition layer to form a cell assembly.
Claim 25
Dependent Claim
28 words
A process according to Claim 22, further characterised in that said process includes the additional step of applying pressure to said cell assembly to further adhere said layers.
Claim 26
Dependent Claim
48 words
A process according to Claims 22 or 23, further characterised in that said process comprises the additional step of rolling the surface of said cathode composition which is not in contact with said current collector layer, said rolling step occurring just prior to said electrolyte layer coating step.
Claim 27
Dependent Claim
68 words
A process according to of Claims 22 to 24, further characterised in that said curing step comprises partial irradiation or partial thermal curing of said cathode composition layer and said electrolyte composition layer, and in that said process comprises the additional step of complete irradiation or complete thermal curing of said cathode composition layer and said electrolyte composition layer directly after applying said alkali metal anode composition layer.
Claim 28
Dependent Claim
50 words
A process according to any of Claims 22 to 25, further characterised in that said process comprises the additional step of rolling the surface of said alkali metal anode composition layer which is to contact said electrolyte layer, said rolling step occurring prior to coating said alkali metal anode layer.
Claim 29
Dependent Claim
24 words
A process according to Claim 26, further characterised in that said process is carried out in an atmosphere containing less than 4 ppm water.
References Cited (Backward Citations)
No citation records indexed.
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