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US5219683A
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Diol diesters and alkoxyalkylesters as solvents for nonaqueous battery electrolytes
Assignee: Edgewell Personal Care Brands LLC
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Filing: 1992-03-06
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Granted: 1993-06-15
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Expires: 2012-03-06
Abstract
Abstract A new class of low flammability solvents for use in the electrolyte of a nonaqueous battery comprising a compound of the general formula ##STR1## in which R is a C 1 -C 10 alkyl group, X is a C 1 -C 8 acyclic group which can be linear, branched, saturated or unsaturated and Y is a C 1 -C 10 alkyl group or a carbonyl group O ##STR2## in which R' is a C 1 -C 10 alkyl group. When Y is a carbonyl group a class of diesters is disclosed which are prepared from a dihydroxy alcohol and two molecules of a monocarboxylic acid. When Y is a C 1 -C 10 alkyl group a class of ether-esters is disclosed. The preferred solvents are ethylene glycol diacetate and 2-ethoxyethylacetate. The solvents are preferably used in combination with a cosolvent such as propylene carbonate and most preferably employ additions of more volatile ether cosolvents such as dimethoxyethane or 1,3-dioxolane for increased discharge performance. Soluble salts used in the electrolyte solution are, for example, LiCF 3 SO 3 LiBF 4 . The preferred lithium salt is LiCF 3 SO 3 .
Inventors
- 👤 Andrew Webber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:54
CPC Classifications
H; H01; H01M; H01M6/00; H01M6/14; H01M6/16; H01M6/162; H01M6/164
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
An electrochemical cell employing an anode of alkali or alkaline earth metals, a cathode material capable of forming a cell with said anode material, and a non-aqueous electrolyte solution, said non-aqueous electrolyte solution comprising an electrolyte solvent of the following general formula: ##STR9## wherein R is a C 1 -C 10 alkyl group; X is a C 1 -C 8 acyclic group which can be linear, branched, saturated or unsaturated; and Y is a C 1 -C 10 alkyl group or a carbonyl group ##STR10## in which R' is a C 1 -C 10 alkyl group; and and electrolyte material soluble in said electrolyte solvent.
Claim 2
Dependent Claim
105 words
An electrochemical cell employing an anode of alkali or alkaline earth metals, a cathode material capable of forming a cell with said anode material, and a non-aqueous electrolyte solution, said non-aqueous electrolyte solution comprising an electrolyte solvent of the following general formula: ##STR9## wherein R is a C 1 -C 10 alkyl group; X is a C 1 -C 8 acyclic group which can be linear, branched, saturated or unsaturated; and Y is a C 1 -C 10 alkyl group or a carbonyl group ##STR10## in which R' is a C 1 -C 10 alkyl group; and and electrolyte material soluble in said electrolyte solvent.
Claim 3
Dependent Claim
56 words
The electrochemical cell of claim 1, wherein in the non-aqueous electrolyte solution: R is a C 1 -C 4 alkyl group; X is a C 1 -C 3 acyclic group; and Y is a C 1 -C 4 alkyl group or a carbonyl group ##STR11## in which R' is a C 1 -C 4 alkyl group.
Claim 4
Dependent Claim
47 words
The electrochemical cell of claim 1, wherein in the non-aqueous electrolyte solution; R is a methyl or ethyl alkyl group; X is an alkylene group selected from methylene or ethylene; and Y is a methyl or ethyl alkyl group or a methyl carbonyl or ethyl carbonyl group.
Claim 5
Dependent Claim
14 words
The electrochemical cell of claim 1, wherein said electrolyte solvent comprises ethylene glycol diacetate.
Claim 6
Dependent Claim
13 words
The electrochemical cell of claim 1, wherein said electrolyte solvent comprises methylene diacetate.
Claim 7
Dependent Claim
13 words
The electrochemical cell of claim 1, wherein said electrolyte solvent comprises 2-ethoxyethyl acetate.
Claim 8
Dependent Claim
14 words
The electrochemical cell of claim 1, wherein said electrolyte solvent includes a non-aqueous cosolvent.
Claim 9
Dependent Claim
13 words
The electrochemical cell of claim 2, wherein said non-aqueous cosolvent is propylene carbonate.
Claim 10
Dependent Claim
20 words
The electrochemical cell of claim 7, wherein said non-aqueous cosolvent is a mixture of propylene carbonate and an ether cosolvent.
Claim 11
Dependent Claim
12 words
The electrochemical cell of claim 9, wherein said ether cosolvent is dimethoxythane.
Claim 12
Dependent Claim
12 words
The electrochemical cell of claim 9, wherein said ether cosolvent is 1,3-dioxolane.
Claim 13
Dependent Claim
16 words
The electrochemical cell of claim 1, wherein said soluble electrolyte material is an alkali metal salt.
Claim 14
Dependent Claim
17 words
The electrochemical cell of claim 1, wherein said soluble electrolyte material is an alkaline earth metal salt.
Claim 15
Dependent Claim
17 words
The electrochemical cell of claim 12, wherein said alkali metal salt is LiCF 3 SO 3 .
Claim 16
Dependent Claim
15 words
The electrochemical cell of claim 12, wherein said alkali metal salt is LiBF 4 .
Claim 17
Dependent Claim
13 words
The electrochemical cell of claim 1, wherein the anode is comprised of lithium.
Claim 18
Dependent Claim
13 words
The electrochemical cell of claim 15, wherein the anode is comprised of lithium.
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