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US 6,063,522 AGranted
Electrolytes containing mixed fluorochemical/hydrocarbon imide and methide salts
Assignee3M Innovative Properties Company
InventorsSteven J. Hamrock, Phat T. Pham
Life of this patent
Estimating the term…
Abstract
Battery electrolytes are described which include particular imide and methide conductive salts having mixed fluorocarbon and hydrocarbon groups. These salts exhibit excellent conductivity in electrolytes and are described as useful in electrochemical cells, such as lithium batteries.
Claims32
A battery electrolyte comprising:
- (a) an imide salt of the formulae ##STR29## wherein:
- X is SO.sub.2 or C(O);
- R.sub.f is a fluorine atom, a straight or branched acyclic perfluoroalkyl group having from 1 to 12 carbon atoms or a cyclic perfluoroalkyl group having from 3 to 12 carbon atoms in which the perfluoroalkyl group is uninterrupted or interrupted by a catenary heteroatom;
- R'.sub.f is a straight or branched perfluoroalkylene group having from 1 to 12 carbon atoms, which may contain a cyclic moiety and which is uninterrupted or interrupted by a catenary heteroatom;
- R.sub.h is selected from the group consisting of a straight or branched aliphatic group having from 2 to 18 carbon atoms and interrupted by a catenary heteroatom, a straight or branched aliphatic or cycloaliphatic group having from 4 to 18 carbon atoms, a substituted or unsubstituted aromatic group, and a reactive group;
- R'.sub.h is a divalent organic group;
- M.sup.n+ is a cation having a valence of n;
- and
- (b) a matrix material.
6 more elements
A battery electrolyte comprising:
- (a) a methide salt of the formula ##STR32## wherein:
- X is SO.sub.2 or C(O);
- R.sub.f is a fluorine atom, a straight or branched acyclic perfluoroalkyl group having from 1 to 12 carbon atoms or a cyclic perfluoroalkyl group having from 3 to 12 carbon atoms in which the perfluoroalkyl group is uninterrupted or interrupted by a catenary heteroatom;
- R.sub.h " is the same or different and is a straight or branched aliphatic group having 1 to 18 carbon atoms, a cycloaliphatic group of 3 to 12 carbon atoms in which the carbon chain of the aliphatic or cycloaliphatic groups is uninterrupted or interrupted by a catenary heteroatom;
- a substituted or unsubstituted aromatic or aromatic alkyl group, in which alkyl has 1 to 4 carbon atoms;
- a reactive group, or when taken together R.sub.h" is an alkylene group of 2 or 3 carbon atoms or a phenylene group joined to the X group at the 1,2 or 1,3 positions of the phenylene group;
- M.sup.n+ is a cation having a valence of n;
- and
- (b) a matrix material.
6 more elements
Dependencies are inferred from the claim text.