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US 2014/0227584 A1Published application
Fluorinated electrolyte compositions
AssigneeE. I. Du Pont de Nemours and Company
InventorsWilliam L. Holstein, Xudong Chen, Jun J. Liu, Mark Gerrit Roelofs
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Abstract
Electrolyte compositions containing a solvent mixture comprising 2,2,-difluoroethyl acetate and ethylene carbonate are described. The electrolyte compositions are useful in electrochemical cells, such as lithium ion batteries.
Claims12
An electrolyte composition comprising:
- (a) at least one electrolyte salt;
- and
- (b) a solvent mixture comprising ethylene carbonate at a concentration of about 10% to about 50% by weight of the solvent mixture;
- and CH3CO2CH2CF2H at a concentration of about 50% to about 90% by weight of the solvent mixture.
1 more element
An electrochemical cell comprising:
- (a) a housing;
- (b) an anode and a cathode disposed in said housing and in conductive contact with one another;
- (c) an electrolyte composition disposed in said housing and providing an ionically conductive pathway between said anode and said cathode, wherein the electrolyte composition comprises:
- (i) at least one electrolyte salt;
- and
- (ii) a solvent mixture comprising ethylene carbonate at a concentration of about 10% to about 50% by weight of the solvent mixture;
- and CH3CO2CH2CF2H at a concentration of about 50% to about 90% by weight of the solvent mixture;
- and
- (d) a porous separator between said anode and said cathode.
6 more elements
Dependencies are inferred from the claim text.