Non-aqueous electrolytes for lithium ion batteries
First Claim
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1. An electrolyte comprising:
- a lithium salt;
a polar aprotic solvent; and
an additive at a concentration of 0.0005 M to 0.05 M, wherein the additive is an anion receptor that assists in the dissolution of LiF on the surface of electrodes.
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Abstract
The present invention is generally related to electrolytes containing anion receptor additives to enhance the power capability of lithium-ion batteries. The anion receptor of the present invention is a Lewis acid that can help to dissolve LiF in the passivation films of lithium-ion batteries. Accordingly, one aspect the invention provides electrolytes comprising a lithium salt; a polar aprotic solvent; and an anion receptor additive; and wherein the electrolyte solution is substantially non-aqueous. Further there are provided electrochemical devices employing the electrolyte and methods of making the electrolyte.
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Citations
26 Claims
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1. An electrolyte comprising:
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a lithium salt;
a polar aprotic solvent; and
an additive at a concentration of 0.0005 M to 0.05 M, wherein the additive is an anion receptor that assists in the dissolution of LiF on the surface of electrodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 26)
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25. A method of preparing an electrolyte, comprising combining a lithium salt;
- a polar aprotic solvent; and
an anion receptor additive that assists in the dissolution of LiF in an amount sufficient to provide a concentration of anion receptor additive at 0.0005 M to 0.05 M.
- a polar aprotic solvent; and
Specification