Nonaqueous electrolytic solution and nonaqueous electrolyte secondary battery

Abstract

A nonaqueous electrolytic solution that can provide a high energy density nonaqueous electrolyte secondary battery having a high capacity, excellent storage characteristics, and excellent cycle characteristics and suppressing the decomposition of an electrolytic solution and the deterioration thereof when used in a high-temperature environment includes an electrolyte, a nonaqueous solvent, and a compound represented by general formula (1): wherein R 1 , R 2 , and R 3 each independently represent a hydrogen atom, a cyano group, or an optionally halogen atom-substituted hydrocarbon group having 1 to 10 carbon atoms, with the proviso that R 1 and R 2 do not simultaneously represent hydrogen atoms.

1 - 24 . (canceled) 
     
     
         25 . A nonaqueous electrolytic solution comprising:
 an electrolyte,   a nonaqueous solvent,   at least one compound selected from the group consisting of a halogen atom-containing cyclic carbonate, a monofluorophosphate, and a difluorophosphate, and   a compound of formula (1):   
       
         
           
           
               
               
           
         
         wherein R 1 , R 2 , and R 3  are each independently a hydrogen atom, a cyano group, a hydrocarbon group having 1 to 10 atoms, or a halogen atom-substituted hydrocarbon group having 1 to 10 carbon atoms, 
         wherein the solution is suitable for a nonaqueous electrolyte secondary battery that comprises a negative electrode, a positive electrode, and a nonaqueous electrolytic solution, the negative electrode and the positive electrode being capable of storing and releasing metal ions. 
       
     
     
         26 . The nonaqueous electrolytic solution according to  claim 25 , wherein the solution is suitable for a nonaqueous electrolyte secondary battery that comprises a negative electrode comprising a carbonaceous material serving as an active material. 
     
     
         27 - 30 . (canceled) 
     
     
         31 . A nonaqueous electrolyte secondary battery comprising:
 a negative electrode,   a positive electrode, and   the nonaqueous electrolytic solution of  claim 25 ,   wherein the negative electrode and the positive electrode are each capable of storing and releasing metal ions.   
     
     
         32 . The nonaqueous electrolyte secondary battery according to  claim 31 , wherein the negative electrode comprises a carbonaceous material serving as an active material.