LITHIUM SALTS OF PENTAFLUOROPHENYLAMIDE ANIONS, PREPARATION THEREOF AND USE THEREOF
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United States of America Patent
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Issued Date -
Sep 27, 2012
app pub date -
Oct 20, 2010
filing date -
Oct 20, 2009
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Abandoned
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Abstract
The present invention provides new lithium salts comprising pentafluorophenylamide anions following the general formula Li+[N(SO2—R)(C6F5)]−, which are optionally present as solvent-free complexes. R is hereby selected from fluorine, linear or branched acyclic or cyclic alkyl groups with 1 to 20 carbon atoms which are not fluorinated, partially fluorinated or fully fluorinated; or not fluorinated, partially fluorinated or fully fluorinated aryl or benzyl groups with 1 to 20 carbon atoms. The lithium salts according to the present invention are produced by reacting the corresponding NH acid of the pentafluorophenylamide with one equivalent of lithium bis(trimethylsilyl)amide or lithium organyl, wherein the reaction is carried out advantageously in the presence of apolar aprotic solvents. In this way, lithium salts in the form of solvent-free complexes are obtained. These solvent-free lithium complexes are thermally, electrochemically and against oxidation stable and comprise a high ionic conductivity. The lithium salts according to the present invention are suitable to be used as ion-conducting materials, electrically conductive materials, dyes and in chemical catalysis. They are preferably used as ion-conducting electrolytes in lithium ion accumulators.
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