EP0332771A1
Expired / Lapsed
EP
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Solid electrolytes
Assignee: Imperial Chemical Industries Ltd
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Filing: 1988-03-15
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Granted: —
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Expires: 2008-03-15
Abstract
Abstract An electrochemical cell which comprises a conductive anode and cathode capable of mutual electrochemical reaction and separated by a solid electrolyte comprising: a) a matrix of cross-linked polymer main chains, having side-chains linked to the main chains, which side chains comprise polar groups free from active hydrogen atoms, b) a polar aprotic liquid dispersed in the matrix, and c) a highly ionised ammonium or alkali metal salt dissolved in the matrix and/or liquid, a cathode therefor, the electrolyte per se, and processes for the preparation of the electrolyte and the cathode.
Inventors
- 👤 Denis George Harold Ballard
- 👤 Philip Cheshire
- 👤 Josef Emilio Przeworski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 12:20
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/022; H01G9/025; H01M; H01M4/00; H01M4/02; H01M4/06; H01M4/08; H01M4/36; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164; H01M6/18; H01M6/181
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
63 words
A solid electrolyte for an electrochemical cell, which comprises: a) a matrix of cross-linked polymer main chains, having side-chains linked to the main chains, which side chains comprise polar groups free from active hydrogen atoms, b) a polar aprotic liquid dispersed in the matrix, and c) an ionised ammonium or alkali metal or alkaline earth metal salt dissolved in the matrix and/or liquid.
Claim 2
Dependent Claim
63 words
A solid electrolyte for an electrochemical cell, which comprises: a) a matrix of cross-linked polymer main chains, having side-chains linked to the main chains, which side chains comprise polar groups free from active hydrogen atoms, b) a polar aprotic liquid dispersed in the matrix, and c) an ionised ammonium or alkali metal or alkaline earth metal salt dissolved in the matrix and/or liquid.
Claim 3
Dependent Claim
31 words
A solid electrolyte according to claim 1 wherein the aprotic polar liquid is one with a dielectric constant of at least 50 and/or a dipole moment of at least 3 Debye.
Claim 4
Dependent Claim
33 words
A solid electrolyte according to claim 2 wherein the aprotic polar liquid is ethylene or propylene carbonate, a dialkylformamide or -sulphoxide, a cyclic ether, sulpholane or a bis(polyalkoxyalkyl) carbonate, or a cyclic amide.
Claim 5
Dependent Claim
30 words
A solid electrolyte according to claim 1, wherein the liquid is present in the matrix at 35 to 200 parts by weight per 100 parts by weight of the matrix.
Claim 6
Dependent Claim
45 words
A process for preparing a solid electrolyte according to claim 1 in any feasible order: a) forming the matrix b) incorporating the highly ionised salt in the matrix or a precursor thereof, and c) introducing the aprotic liquid into the matrix or a precursor thereof.
Claim 7
Dependent Claim
31 words
A cathode for an electrochemical cell, which comprises a solid dispersion of a potential oxidant and a highly conductive material in a matrix of a solid electrolyte according to claim 1.
Claim 8
Dependent Claim
36 words
A cathode according to claim 6 comprising 30 to 60% MnO₂ and 2 to 10% carbon black, acetylene black or a transition metal (w/w on total cathode) as particles of less than 40 micron grain size.
Claim 9
Dependent Claim
42 words
A process for preparing a cathode according to claim 6 comprising in any feasible order steps a) to c) of the process of claim 5 and d) conventionally dispersing the potential oxidant and conductive material in the matrix or a precursor thereof.
Claim 10
Dependent Claim
25 words
An electrochemical cell which comprises a conductive anode and cathode capable of mutual electrochemical reaction and separated by a solid electrolyte according to claim 1.
Claim 11
Dependent Claim
16 words
A cell according to claim 9 wherein the cathode is a cathode according to claim 7.
References Cited (Backward Citations)
EP0078505A1
Cited
EP0213985A1
Cited
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