High voltage electrolyte additives

Abstract

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 voltage electrolyte includes a base electrolyte and one or more vinylsilane or fluorosilane additives, which impart these desirable performance characteristics.

1 . A lithium ion battery, comprising:
 an anode;   a cathode; and   a liquid electrolyte comprising a lithium salt; a solvent, and an additive wherein the additive is selected from the group consisting of tetravinylsilane, trivinylmethylsilane, trinvinylphenylsilane and combination thereof.   
     
     
         2 . The lithium ion battery of  claim 1 , wherein the cathode is an oxide comprised of nickel and cobalt. 
     
     
         3 . The lithium ion battery of  claim 2 , wherein the oxide is a nickel manganese cobalt oxide or nickel cobalt aluminum oxide. 
     
     
         4 . The lithium ion battery of  1 , wherein the additive is present in a concentration of 0.2% to 10% by weight of the liquid electrolyte. 
     
     
         5 . The lithium ion battery of  claim 4 , wherein the concentration is 0.2% to 2%. 
     
     
         6 . The lithium ion battery of  claim 5 , wherein the concentration is 0.2% to 1%. 
     
     
         7 . The lithium ion battery of  claim 1 , wherein the concentration is 1%. 
     
     
         8 . The lithium ion battery of  claim 4 , wherein the additive is the only additive present in the liquid electrolyte. 
     
     
         9 . The lithium ion battery of  claim 5 , wherein the only additive present in the liquid electrolyte. 
     
     
         10 . The lithium ion battery of  claim 6 , wherein the additive is the only additive present in the liquid electrolyte. 
     
     
         11 . The lithium ion battery of  claim 7 , wherein the additive is the only additive present in the liquid electrolyte. 
     
     
         12 . The lithium ion battery of  claim 1 , wherein the additive is tetravinylsilane. 
     
     
         13 . The lithium ion battery of  claim 1 , wherein the additive is trinvinylphenylsilane. 
     
     
         14 . The lithium ion battery of  claim 1 , wherein the additive is trivinylmethylsilane. 
     
     
         15 - 18 . (canceled)