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US 2017/0250445 A1Published application
Nonaqueous electrolyte compositions comprising sultone and fluorinated solvent
AssigneeSolvay SA
InventorsStephen E. Burkhardt, Kostantinos Kourtakis, Jun J. Liu, Mark Gerrit Roelofs, Sang-Hwan Kim
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Abstract
Described are electrolyte compositions comprising a fluorinated solvent, an organic carbonate, a sultone, and optionally a borate. The fluorinated solvent may be a fluorinated acyclic carboxylic acid ester, a fluorinated acyclic carbonate, a fluorinated acyclic ether, or mixtures thereof. The organic carbonate may be fluorinated or non-fluorinated. The electrolyte compositions are useful in electrochemical cells, such as lithium ion batteries.
Claims28
An electrolyte composition comprising:
- a) a fluorinated solvent;
- b) an organic carbonate;
- c) a sultone, saturated or unsaturated, which is optionally substituted with one or more halogen, aryl, or linear, branched, or cyclic, saturated or unsaturated alkyl groups;
- and
- d) at least one electrolyte salt.
2 more elements
A method comprising combining:
- a) a fluorinated solvent;
- b) an organic carbonate;
- c) a sultone, saturated or unsaturated, which is optionally substituted with one or more halogen, aryl, or linear, branched, or cyclic, saturated or unsaturated alkyl groups;
- and
- d) at least one electrolyte salt;
- to form an electrolyte composition;
- wherein the fluorinated solvent is:
- A) a fluorinated acyclic carboxylic acid ester represented by the formula:
- R1—COO—R2,
- B) a fluorinated acyclic carbonate represented by the formula:
- R3—OCOO—R4,
- C) a fluorinated acyclic ether represented by the formula:
- R5—O—R6,
- or a mixture thereof;
- wherein
- i) R1 is H, an alkyl group, or a fluoroalkyl group;,
- ii) R3 and R5 is each independently a fluoroalkyl group and can be either the same as or different from each other;
- iii) R2, R4, and R6 is each independently an alkyl group or a fluoroalkyl group and can be either the same as or different from each other;
- iv) either or both of R1 and R2 comprises fluorine;
- and
- v) R1 and R2, R3 and R4, and R5 and R6, each taken as a pair, comprise at least two carbon atoms but not more than seven carbon atoms.
18 more elements
Dependencies are inferred from the claim text.