Electrolyte for lithium battery and lithium battery including the electrolyte

Abstract

An electrolyte for a lithium battery includes an organic solvent; and a compound represented by Formula 1: wherein, in Formula 1, X 1 to X 4 , A 1 to A 4 , and R 1 to R 4 are further defined in the specification.

What is claimed is: 
     
         1 . An electrolyte for a lithium battery, the electrolyte comprising:
 an organic solvent; and   a compound represented by Formula 1:   
       
         
           
           
               
               
           
         
         wherein, in Formula 1, 
         X 1  to X 4  are each independently oxygen (O) or nitrogen (N), 
         A 1  to A 4  each independently denote a chemical bond, an unsubstituted or substituted C1-C10 alkylene group, an unsubstituted or substituted C6-C10 arylene group, an unsubstituted or substituted C7-C10 arylalkylene group, an unsubstituted or substituted C2-C10 heteroarylene group, an unsubstituted or substituted C3-C10 heteroarylalkylene group, or an unsubstituted or substituted C4-C10 carbocyclic group, 
         at least one of R 1  to R 4  is —C(R 5 )═Y 1 , where Y 1  is C(R 6 )(R 7 ) or oxygen (O), and R 5  to R 7  are each independently a hydrogen, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C7-C10 arylalkyl group, a C6-C10 aryloxy group, a C2-C10 heteroaryl group, a C3-C10 heteroarylalkyl group, a C2-C10 heteroaryloxy group, a C4-C10 carbocyclic group, or a halogen atom, and 
         the remaining R 1  to R 4  are each independently a hydrogen, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C7-C10 arylalkyl group, a C6-C10 aryloxy group, a C2-C10 heteroaryl group, a C3-C10 heteroarylalkyl group, a C2-C10 heteroaryloxy group, a C4-C10 carbocyclic group, or a halogen atom. 
       
     
     
         2 . The electrolyte as claimed in  claim 1 , wherein X 1  to X 4  are all oxygen (O). 
     
     
         3 . The electrolyte as claimed in  claim 1 , wherein the compound represented by Formula 1 is a compound represented by Formula 2 or a compound represented by Formula 3: 
       
         
           
           
               
               
           
         
         wherein, in Formula 2, 
         a is independently from 1 to 4, and 
         R 5  to R 7  are each independently a hydrogen, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C7-C10 arylalkyl group, a C6-C10 aryloxy group, a C2-C10 heteroaryl group, a C3-C10 heteroarylalkyl group, a C2-C10 heteroaryloxy group, a C4-C10 carbocyclic group, or a halogen atom, 
       
       
         
           
           
               
               
           
         
         wherein, in Formula 3, 
         R 5  is independently a hydrogen, a C1-C10 alkyl group, a C1-C10 alkoxy group, a C6-C10 aryl group, a C7-C10 arylalkyl group, a C6-C10 aryloxy group, a C2-C10 heteroaryl group, a C3-C10 heteroarylalkyl group, a C2-C10 heteroaryloxy group, a C4-C10 carbocyclic group, or a halogen atom. 
       
     
     
         4 . The electrolyte as claimed in  claim 1 , wherein the compound represented by Formula 1 is selected from compounds represented by Formulae 4 to 9: 
       
         
           
           
               
               
           
         
         
           
           
               
               
           
         
       
     
     
         5 . The electrolyte as claimed in  claim 1 , wherein the compound represented by Formula 1 is present in a range of about 0.01 wt % to about 10 wt % based on a total weight of the electrolyte. 
     
     
         6 . The electrolyte as claimed in  claim 1 , wherein the organic solvent includes one or more of a carbonate-based compound, an ester-based compound, an ether-based compound, a ketone-based compound, an alcohol-based compound, or an aprotic solvent. 
     
     
         7 . The electrolyte as claimed in  claim 1 , further comprising a lithium salt. 
     
     
         8 . The electrolyte as claimed in  claim 1 , wherein the organic solvent includes about 20 vol % to about 80 vol % of a cyclic carbonate compound and about 20 vol % to about 70 vol % of a chain carbonate compound. 
     
     
         9 . A lithium battery, comprising:
 a cathode;   an anode; and   at least one selected from the electrolyte as claimed in  claim 1  and a reaction product of the electrolyte as claimed in  claim 1 .   
     
     
         10 . The lithium battery as claimed in  claim 9 , wherein the lithium battery operates in a voltage range of about 2.8 V to about 4.3 V.