Electrolyte additives
View Patent ↗Described herein are additives for use in electrolytes that provide a number of desirable characteristics when implemented within batteries, such as high capacity retention during battery cycling at high temperatures. In some embodiments, a high temperature electrolyte includes a base electrolyte and one or more polymer additives, which impart these desirable performance characteristics. The polymer additives can be homopolymers or copolymers.
1. A liquid electrolyte formulation, comprising:
a lithium salt,
a non-aqueous solvent, and
a polymer additive represented by Formula (f):
where n is an integer greater than 1and R 1 , R 2 , R 3 R 4 , and R 5 are independently selected to be an alkoxy group or a substituted alkoxy group;
wherein the liquid electrolyte conducts ions in an electrochemical cell.
2. The liquid electrolyte formulation of claim 1 , wherein the polymer additive is represented by Formula (e):
3. The liquid electrolyte formulation of claim 1 , wherein the polymer additive has a dynamic viscosity of less than or equal to 50 mPA*s at 25 degrees Celsius.
4. The liquid electrolyte formulation of claim 1 , wherein the polymer additive is present at a concentration of at least 0.1 weight percent of the total weight of the electrolyte formulation.
5. The liquid electrolyte formulation of claim 1 , wherein the polymer additive is present at a concentration of at least 0.5 weight percent of the total weight of the electrolyte formulation.