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US Patent 7981388 Process for the purification of lithium salts

Patent 7981388 was granted and assigned to AIR PRODUCTS AND CHEMICALS, INC. on July, 2011 by the United States Patent and Trademark Office.

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Patent 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, and to methods for purifying battery active materials. The electrolyte comprises at least one solvent and 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.

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