Patent ID: 6864017

Claim:
An electrolyte in an electrochemical cell comprising a lithium complex salt of formula where R 1 and R 2 are optionally directly linked to one another via a single a double bond, and each, independently is phenyl, naphthyl, anthracenyl or phenanthrenyl, optionally mono- to hexasubstituted by C 1 -C 6 alkyl, C 1 -C 6 -alkoxy or halogen; or each independently is pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy or halogen; or each independently is hydroxybenzenecarboxyl, hydroxynaphthalenecarboxyl, hydroxybenzenesulfonyl or hydroxynaphthalenesulfonyl, each optionally mono- to tetrasubstituted by C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy groups or halogen; ring substituents R 3 -R 6 are optionally directly linked to an adjacent ring substituent via a single or double bond and are: C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy or halogen; phenyl, naphthyl, anthracenyl or phenanthrenyl, each optionally mono- to hexasubstituted by C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy or halogen; or pyridyl, pyrazyl or pyrimidyl, each optionally mono- to tetrasubstituted by C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy or halogen.