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Hydrophobic ionic liquids

United States Patent

*** EXPIRED ***
October 27, 1998
View the Complete Patent at the US Patent & Trademark Office
Ionic liquids having improved properties for application in non-aqueous batteries, electrochemical capacitors, electroplating, catalysis and chemical separations are disclosed. Exemplary compounds have one of the following formulas: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are either H; F; separate alkyl groups of from 1 to 4 carbon atoms, respectively, or joined together to constitute a unitary alkylene radical of from 2 to 4 carbon atoms forming a ring structure converging on N; or separate phenyl groups; and wherein the alkyl groups, alkylene radicals or phenyl groups may be substituted with electron withdrawing groups, preferably F--, Cl--, CF.sub.3 --, SF.sub.5 --, CF.sub.3 S--, (CF.sub.3).sub.2 CHS-- or (CF.sub.3).sub.3 CS--; and X.sup.- is a non-Lewis acid-containing polyatomic anion having a van der Waals volume exceeding 100 .ANG..sup.3.
Koch; Victor R. (Lincoln, MA), Nanjundiah; Chenniah (Lynn, MA), Carlin; Richard T. (Nashua, NH)
Covalent Associates Incorporated (Woburn, MA)
08/ 932,931
September 17, 1997
GOVERNMENT RIGHTS Part of the work leading to this invention was carried out with United States government support provided under Department of Defense contracts F33615-94-C-2469 and Department of Energy contract F602-96ER82149. Therefore the U.S. government has certain rights in this invention.