EP0051947A1
Expired / Lapsed
EP
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Solid state electrolytes for electrochemical cells
Assignee: Spectrum Brands Inc
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Filing: 1981-10-23
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Granted: —
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Expires: 2001-10-23
Abstract
Abstract Solid-state electrolytes for use in cells with lithium anodes provided by interdiffusing LiM'O n and Li x M" y Y z or their constituents and optionally alumina, wherein M' and M" are elements from Groups IIA, IIIA, IIB, IVA, IVB, VA and VB of the Periodic Table, X is a halogen, n equals ½ (1 + valence of M') x and y are numbers from 0 to 1, 0.1 to 1 respectively and z equals x + y (valence of M").
Inventors
- 👤 Ashok Vendimadhav Joshi
- 👤 William Paul Sholette
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 05:26
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/18; Y; Y02; Y02E; Y02E60/00; Y02E60/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
179 words
A solid state electrolyte for use in electrochemical devices, which electrolyte comprises an interdiffused mixture of lithium, oxygen, a halide and at least one of M' and M", wherein the composition of the electrolyte is such as would result from the interdiffusion of a material "A" and a material "B" with or without alumina, material "A" being representable by the formula LiM'O n and material "B" by the formula Li x M" y X z wherein, in the formulas, X represents a halide atom M' and M' can be the same or different and represent at least one element from Groups IIA, IIIA, IIB, IVA, IVB, VA and VB of the Periodic Table. . n is a number depending on the valence of M' and calculated by n = 1 + valence of M' 2 x is O or a number greater than 0 and not more than 1, y is a number from 0.1 to 1, and z is a number depending on the valence of M" and calculated by z = x + y (valence of M")
Claim 2
Dependent Claim
179 words
A solid state electrolyte for use in electrochemical devices, which electrolyte comprises an interdiffused mixture of lithium, oxygen, a halide and at least one of M' and M", wherein the composition of the electrolyte is such as would result from the interdiffusion of a material "A" and a material "B" with or without alumina, material "A" being representable by the formula LiM'O n and material "B" by the formula Li x M" y X z wherein, in the formulas, X represents a halide atom M' and M' can be the same or different and represent at least one element from Groups IIA, IIIA, IIB, IVA, IVB, VA and VB of the Periodic Table. . n is a number depending on the valence of M' and calculated by n = 1 + valence of M' 2 x is O or a number greater than 0 and not more than 1, y is a number from 0.1 to 1, and z is a number depending on the valence of M" and calculated by z = x + y (valence of M")
Claim 3
Dependent Claim
13 words
An electrolyte as claimed in claim 1, wherein X represents an iodine atom.
Claim 4
Dependent Claim
30 words
An electrolyte as claimed in claim 1 or claim 2, wherein M' and M" are the same or different and represent one or more elements of aluminium, boron and calcium.
Claim 5
Dependent Claim
20 words
An electrolyte as claimed in claim 1 wherein material "A" is LiAlO 2 and material "B" is CaI 2 .
Claim 6
Dependent Claim
20 words
An electrolyte as claimed in claim 1 wherein material "A" is LiBO 2 and material "B" is CaI 2 .
Claim 7
Dependent Claim
24 words
An electrolyte as claimed in any one of claims 1 to 5, which contains alumina in an amount not greater than 50 mole percent.
Claim 8
Dependent Claim
50 words
An electrolyte as claimed in any one of claims 1 to 5, whose composition is such as would result from the interdiffusion of from 5 to 40 mole percent of material "A", from 30 to 90 mole percent of material "B" and from 0 to 50 mole percent of alumina.
Claim 9
Dependent Claim
33 words
A process of making a solid state electrolyte as claimed in any one of claims 1 to 7, which comprises interdiffusing a mixture of material "A" and material "B" with or without alumina.
Claim 10
Dependent Claim
44 words
A process as claimed in claim 8, wherein the mixture of material "A" and material "B" is kept at a temperature in excess of the melting point of one of its constituents for at least 0.25 hour, quenched and ground to a fine powder.
Claim 11
Dependent Claim
21 words
An electrochemical cell having a lithium anode and a solid-state electrolyte as claimed in any one of claims 1 to 7.
References Cited (Backward Citations)
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