Electrochemical cells that include lewis acid: lewis base complex electrolyte additives

A method of making an electrolyte solution, the method comprising:

• combining a solvent, an electrolyte salt, and a LA:LB complex;
• wherein the LA:LB complex is represented by the following general formula:
• [(FnA)x-L]
• where A is boron or phosphorous,
• F is fluorine,
• L is an aprotic organic amine,
• n is 3 or 5,
• when n=3, A is boron, and when n=5, A is phosphorous,
• x is an integer from 1-3, and
• wherein at least one N atom of the aprotic organic amine, L, is bonded directly to A, and
• wherein the LA:LB complex is present in the solution in an amount of between 0.01 and 5.0 wt %, based on the total weight of the electrolyte solution.

An electrolyte solution comprising:

• a solvent;
• an electrolyte salt;
• and
• a LA:LB complex represented by the following general formula:
• [(FnA)x-L]
• where A is boron or phosphorous,
• F is fluorine,
• L is an aprotic heteroaromatic amine,
• n is 3 or 5,
• when n=3, A is boron, and when n=5, A is phosphorous,
• x is an integer from 1-3, and
• wherein at least one N atom of the aprotic heteroaromatic amine, L, is bonded directly to A.