EP0385802A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Solid state electrochemical cell
Assignee: MHB Joint Venture
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Filing: 1990-03-02
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Granted: —
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Expires: 2010-03-02
Abstract
Abstract A sold state laminar electrochemical cell (10) has an alkali metal anode layer (12), a solid ionically conducting electrolyte layer (14) and a cathode/current collector layer (16). The electrolyte layer (14) is interposed between the alkali metal anode layer (12) and the cathode/current collector layer (16). The cathode/current collector layer (16) comprises an electrically conductive substrate (18) having a plurality of surface voids (20) and a composite cathode composition (22) comprising an intercalation compound, an electrically conductive filler and an ionically conductive electrolyte. The cathode composition (22) is coated on the surface of the substrate (18) facing the electrolyte layer (14) and is maintained in the voids (20) of the surface.
Inventors
- 👤 Denis Gaston Fauteux
- 👤 Peter Miller Blonsky
- 👤 Michael Joseph Moore
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 03:58
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; H01M4/663; H01M4/669; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A solid state electrochemical cell having an alkali metal anode layer; and being characterised in comprising a solid ionically conducting electrolyte layer, and a cathode/current collector layer, said electrolyte layer being interposed between said alkali metal anode layer and said cathodeicurrent collector layer; and in that said cathode/current collector layer comprises an electrically conductive substrate having a plurality of surface voids and a composite cathode composition comprising an intercalation compound, an electrically conductive filler, preferably carbon particles, and an ionically conductive electrolyte, said cathode composition being coated on the surface of said substrate facing said electrolyte layer and being maintained in the voids of said surface.
Claim 2
Dependent Claim
106 words
A solid state electrochemical cell having an alkali metal anode layer; and being characterised in comprising a solid ionically conducting electrolyte layer, and a cathode/current collector layer, said electrolyte layer being interposed between said alkali metal anode layer and said cathodeicurrent collector layer; and in that said cathode/current collector layer comprises an electrically conductive substrate having a plurality of surface voids and a composite cathode composition comprising an intercalation compound, an electrically conductive filler, preferably carbon particles, and an ionically conductive electrolyte, said cathode composition being coated on the surface of said substrate facing said electrolyte layer and being maintained in the voids of said surface.
Claim 3
Dependent Claim
29 words
A cell according to Claim 1, further characterised in that said anode layer comprises lithium foil, a metal foil coated with a layer of lithium or a lithium alloy.
Claim 4
Dependent Claim
40 words
A cell according to Claim 1 or Claim 2, further characterised in that said electrolyte layer comprises a layer of a solid solution of an ionizable alkali metal salt or an alkaline earth salt and an ionically conductive polymeric material.
Claim 5
Dependent Claim
114 words
A cell according to Claim 3, further characterised in that said polymeric material contains a repeating unit selected from: wherein R is hydrogen or a group Ra, -CH 2 0Ra, -CH 2 0ReRa, -CH 2 N(CH 3 ) 2 , in which Ra is an alkyl group containing 1 to 16 carbon atoms and preferably 1 to 4 carbon atoms or a cycloalkyl group containing 5 to 8 carbon atoms, and Re is an ether group of formula -CH 2 -CH 2 0p- wherein p is a number from 1 to 100, preferably 1 or 2; wherein R is Ra, or ReRa, as defined above; and wherein Re and Ra are as defined above.
Claim 6
Dependent Claim
16 words
A cell according to Claim 3, further characterised in that said polymeric material comprises polyethylene oxide.
Claim 7
Dependent Claim
114 words
A cell according to Claims 3, 4 or 5, further characterised in that said salt is a salt of a metal cation selected from Li + , Na + , K + , Mg 2+ ,Ca 2+ and NH 4 + , and an anion selected from I - , ClO 4 - , BF 4 -, ASF 6 - , CF 3 SO 3 -, CF 3 C0 3 -, B 12 H 12 2- , B 10 Cl 10 2- , and BZ 4 -, where Z is C 6 H 5 , an alkyl chain or an aryl chain, said salt cation and said salt anion being maintained in stoichiometric amounts.
Claim 8
Dependent Claim
61 words
A cell according to any preceding claim, further characterised in that said intercalation compound is selected from of V 6 0 13 , Mo0 2 , MnO z , V 2 0s, TiS 2 , MOS3, Cr 3 O 6 , Li x V 3 O 8 , V 3 O 8 , VSz, NbSez, FeOCI, CrOBr, FeS, NiS, CoO, CuO.
Claim 9
Dependent Claim
43 words
A cell according to any preceding claim, further characterised in that said ionically conductive electrolyte of said cathode composition comprises a polymer, preferably comprising acrylated polyethylene oxide, the polymer containing a solid solution of an ionizable alkali metal salt or alkaline earth salt.
Claim 10
Dependent Claim
36 words
A cell according to any preceding claim, further characterised in that said substrate comprises a substrate in the form of a screen, grid, foamed or expanded state, etched foil, electrodeposited film, woven fabric or non-woven fabric.
Claim 11
Dependent Claim
25 words
A cell according to Claim 9, wherein the material of said substrate is selected from carbon, copper, aluminium, nickel, steel, lead, iron and combinations thereof.
References Cited (Backward Citations)
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