Non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery

Abstract

A non-aqueous liquid electrolyte suitable for use in a non-aqueous liquid electrolyte secondary battery comprising a negative electrode and a positive electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte, the negative electrode containing a negative-electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom, in which the non-aqueous liquid electrolyte comprises a carbonate having at least either an unsaturated bond or a halogen atom.

1 - 21 . (canceled) 
     
     
         22 . A non-aqueous secondary battery comprising a negative electrode and a positive electrode, capable of intercalating and deintercalating lithium ions, and a non-aqueous liquid electrolyte, the negative electrode containing a negative-electrode active material comprising at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom,
 wherein the non-aqueous liquid electrolyte comprises a carbonate having an unsaturated bond; and a compound represented by the formula (E-1):   
       
         
           
           
               
               
           
         
       
       wherein
 X e  represents a halogen atom, alkyl group or aryl group; 
 when X e  is an alkyl group or aryl group, X e  may be further substituted with a halogen atom, alkyl group or aryl group; 
 n represents an integer of 1 or larger and 6 or smaller; and 
 when n is 2 or larger, the two or more of X e  may be the same or different from each other, and two or more X e  may be connected to each other to form a ring structure or a cage structure.