High purity lithium polyhalogenated boron cluster salts useful in lithium batteries
AssigneeAir Products and Chemicals, Inc.
InventorsSergei V. Ivanov, William J. Casteel, Jr., Wade H. Bailey, III
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Abstract
The present invention relates to lithium secondary batteries comprising a negative electrode, a positive electrode, a separator and a lithium-based electrolyte carried in an aprotic solvent, and to the electrolyte compositions. The electrolyte comprises a lithium salt of the formula: Li2B12FxH12-x-yZy where x+y is from 3 to 12, and x and y are independently from 0 to 12, and Z comprises at least one of Cl and Br.
Claims17
A lithium ion secondary battery comprising:
- an anode, a cathode, a separator and an electrolyte comprising:
- at least one organic aprotic carrier and
- at least one lithium salt of the formula:
- Li2B12FxH12-x-yZy
- where x is greater than or equal to 8 and x+y is from 8 to 12, and Z comprises at least one of Cl and Br, and wherein the electrolyte is substantially free of non-lithium alkali metals.
A lithium salt comprising:
- Li2B12FxH12-x-yZy
- where x is greater than or equal to 8 and x+y is from 8 to 12, and Z comprises at least one of Cl and Br, and a hydroxyl content of less than about 1,000 ppm and is substantially free of non-lithium cations.
An electrolyte comprising a combination of at least one lithium salt and at least one organic aprotic solvent, wherein said lithium salt comprises:
- Li2B12FxH12-x-yZy
- where x is greater than or equal to 8 and x+y is from 8 to 12, and Z comprises at least one of Cl and Br, and wherein the electrolyte has a hydroxyl content of less than about 1,000 ppm and is substantially free of non-lithium metal cations.
Dependencies are inferred from the claim text.