Conducting salts for galvanic cells, the production thereof and their use

A process for producing a conducting salt, wherein the conducting salt comprises lithium bis(oxalato)borate and a mixed lithium-borate salt of formula (I)

• wherein the conducting salt is fluorine free;
• wherein the proportion of the mixed lithium-borate salt of formula (I) in the conducting salt ranges from 0.01 mol. % to 20 mol. %, and
• wherein
• R1 and R2 are, independently of one another, H, alkyl having 1 to 5 C atoms, aryl, silyl or a polymer, and wherein if at least one of R1 or R2 are alkyl, said alkyl may be linked to a further chelatoborate residue,
• Y1 and Y2 together are a single oxygen atom, m=1, n=0, and wherein Y3 and Y4 are, independently of one another, H or an alkyl residue with 1 to 5 C atoms, or wherein
• Y1, Y2, Y3, Y4 are, in each case, independently of one another, OR, wherein R is an alkyl residue with 1 to 5 C atoms, H or an alkyl residue with 1 to 5 C atoms, and where m=0 or 1, n=0 or 1, or wherein
• Y2 and Y3 are members of a 5-membered or 6-membered aromatic or heteroaromatic ring containing at least one of N, O or S, wherein Y1 and Y4 are not applicable and n=0, m=0 or 1, comprising mixing a boron compound, oxalic acid and a chelating agent L2 and a lithium compound in a molar ratio of of 1:2:1, wherein the mixture of oxalic acid and chelating agent L2 contains a maximum of 20 mol. % chelating agent L2.

A conducting salt comprising lithium bis(oxalato)borate (LiBOB) and a mixed lithium-borate salt of formula (I):

• wherein the conducting salt is fluorine free;
• wherein the proportion of compound (I) in the conducting salt ranges from 0.01 mol. % to 20 mol. % and
• wherein
• R1 and R2 are, independently of one another, H, alkyl having 1 to 5 C atoms, aryl, silyl or a polymer, wherein if R1 and R2 are alkyl, the alkyl may be linked to a further chelatoborate residue, and wherein
• Y1 and Y2 together are a single oxygen atom, m=1, n=0, and wherein Y3 and Y4 are, independently of one another, H or an alkyl residue with 1 to 5 C atoms.