ELECTROCHEMICAL CELLS AND THEIR USE

摘要

Mixtures containing A) at least one aprotic organic solvent or a mixture of aprotic solvents which is/are liquid at room temperature, B) at least one compound of the general formula (I) or (II), where the variables are defined as follows: the radicals R1 are different or identical and are each selected from among C1-C10-alkyl, C1-C10-alkoxy, C3-C10-cycloalkyl, benzyl and C6-C14-aryl, in each case unsubstituted or monosubstituted or polysubstituted by C1-C4-alkyl, benzyl or phenyl, R2 is selected from among COOR7, C1-C10-alkyl, C2-C10-alkenyl, C3-C10-cycloalkyl, benzyl, C6-C14-aryl, in each case unsubstituted or monosubstituted or polysubstituted by C1-C4-alkyl, benzyl or phenyl, R3, R4 are different or identical and are each selected from among hydrogen, C1-C10-alkyl, C3-C10-cycloalkyl, benzyl and C6-C14-aryl, in each case unsubstituted or monosubstituted or polysubstituted by C1-C4-alkyl, benzyl or phenyl, or >C(R3)2 is a >C=O group, the radicals X may be different or identical and are each selected from among oxygen, sulphur, N-R5 and C(R6)2, where R5 is selected from among C1-C10-alkyl, C3-C10-cycloalkyl, benzyl and C6-C14-aryl, in each case unsubstituted or monosubstituted or polysubstituted by C1-C4-alkyl, benzyl or phenyl, the radicals R6 are different or identical and are each selected from among hydrogen, C1-C10-alkyl, C3-C10-cycloalkyl, benzyl and C6-C14-aryl, in each case unsubstituted or monosubstituted or polysubstituted by C1-C4-alkyl, benzyl or phenyl, R7 is selected from among C1-C4-alkyl, n is an integer in the range from 1 to 3, C) water in the range from 0 to 30 ppm, D) optionally at least one further additive, E) optionally at least one lithium salt.