Nonaqueous electrolyte compositions comprising a fluorinated solvent and a 2-furanone
AssigneeSolvay SA
InventorsStephen E. BURKHARDT, Stephen MANZO
Life of this patent
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Abstract
Disclosed herein are non-aqueous electrolyte compositions comprising a fluorinated solvent, a carbonate co-solvent, at least one 2-furanone derivative, and at least one electrolyte salt. In some embodiments, the electrolyte compositions further comprise a cyclic sulfate. The fluorinated solvent may be a fluorinated acyclic carboxylic acid ester, a fluorinated acyclic carbonate, a fluorinated acyclic ether, or combinations thereof. The electrolyte compositions are useful in electrochemical cells, such as lithium ion batteries.
Claims26
An electrolyte composition comprising:
- a) a fluorinated solvent, wherein the fluorinated solvent is a fluorinated acyclic carboxylic acid ester represented by the formula
- R1—COO—R2,
- wherein
- i) R1 is H, an alkyl group, or a fluoroalkyl group;
- ii) R2 is an alkyl group or a fluoroalkyl group;
- iii) either or both of R1 and R2 comprises fluorine;
- and
- iv) R1 and R2, taken as a pair, comprise at least two carbon atoms but not more than seven carbon atoms;
- b) a carbonate co-solvent;
- c) at least one γ-lactone represented by Formula (II)
- wherein
- R7, R8, R9, and R10 is each independently H, F, a linear or branched C1 to C10 alkyl group, or a linear or branched C1 to C10 fluoroalkyl group;
- and
- d) at least one electrolyte salt.
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A method comprising:
- combining:
- a) a fluorinated solvent, wherein the fluorinated solvent is a fluorinated acyclic carboxylic acid ester represented by the formula
- R1—COO—R2,
- wherein
- i) R1 is H, an alkyl group, or a fluoroalkyl group;
- ii) R2 is an alkyl group or a fluoroalkyl group;
- iii) either or both of R1 and R2 comprises fluorine;
- and
- iv) R1 and R2, taken as a pair, comprise at least two carbon atoms but not more than seven carbon atoms;
- b) a carbonate co-solvent;
- c) at least one γ-lactone represented by Formula (II)
- wherein
- R7, R8, R9, and R10 is each independently H, F, a linear or branched C1 to C10 alkyl group, or a linear or branched C1 to C10 fluoroalkyl group;
- and
- d) at least one electrolyte salt;
- to form an electrolyte composition.
Dependencies are inferred from the claim text.