Non-aqueous liquid electrolyte and non-aqueous liquid electrolyte secondary battery using the same

Abstract

A non-aqueous liquid electrolyte to be used for a non-aqueous liquid electrolyte secondary battery containing a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte. In the non-aqueous liquid electrode, the anode electrode contains an anode electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom. The non-aqueous liquid electrolyte also contains a carbonate having at least either an unsaturated bond or a halogen atom, and also contains a compound represented by formula (I) as defined herein and a saturated cyclic carbonate compound as defined herein.

What we claim is: 
     
         1 . A non-aqueous liquid electrolyte to be used for a non-aqueous liquid electrolyte secondary battery comprising a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte, the anode electrode containing a anode electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom,
 wherein said non-aqueous liquid electrolyte contains a carbonate having at least either an unsaturated bond or a halogen atom, and also contains a compound represented by formula (I) below and a saturated cyclic carbonate compound   
       
         
           
           
               
               
           
         
         wherein in formula (I), n represents an integer which is greater than or equal to 3, m represents an integer which is greater than or equal to 1, and the sum of n and m is greater than or equal to 5, and all or part of the hydrogen atoms may be substituted with a fluorine atom. 
       
     
     
         2 . The non-aqueous liquid electrolyte as defined in  claim 1 , wherein in formula (I), n and m are integers different from each other. 
     
     
         3 . The non-aqueous liquid electrolyte as defined in  claim 1 , wherein in said non-aqueous liquid electrolyte, the concentration of said compound represented by formula (I) is 5 volume % or higher, and 95 volume % or lower. 
     
     
         4 . The non-aqueous liquid electrolyte as defined in  claim 1 , wherein in said non-aqueous liquid electrolyte, the concentration of said saturated cyclic carbonate is 5 volume % or higher, and 50 volume % or lower. 
     
     
         5 . The non-aqueous liquid electrolyte as defined in  claim 1 , wherein in said non-aqueous liquid electrolyte, the concentration of said carbonate having at least either an unsaturated bond or a halogen atom is 0.01 weight % or higher, and 70 weight % or lower. 
     
     
         6 . The non-aqueous liquid electrolyte as defined in  claim 1 , wherein said carbonate having an unsaturated bond or a halogen atom is one or more carbonate compounds selected from the group consisting of vinylene carbonate, vinylethylene carbonate, fluoroethylene carbonate, difluoroethylene carbonate and derivatives of these carbonate compounds. 
     
     
         7 . The non-aqueous liquid electrolyte as defined in  claim 1 , further comprising ethylene carbonate and/or propylene carbonate. 
     
     
         8 . The non-aqueous liquid electrolyte as defined in  claim 1 , further comprising at least one additional carbonate selected from the group consisting of dimethyl carbonate, ethylmethyl carbonate, diethyl carbonate, methyl-n-propyl carbonate, ethyl-n-propyl carbonate and di-n-propyl carbonate. 
     
     
         9 . A non-aqueous liquid electrolyte to be used for a non-aqueous liquid electrolyte secondary battery comprising a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and the non-aqueous liquid electrolyte, the anode electrode containing a anode electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom,
 wherein said non-aqueous liquid electrolyte contains a compound represented by formula (I) below and a saturated cyclic carbonate compound.   
       
         
           
           
               
               
           
         
         wherein in formula (I), 
         n represents an integer which is greater than or equal to 3, m represents an integer which is greater than or equal to 1, and the sum of n and m is greater than or equal to 5 and all or part of the hydrogen atoms may be substituted with a fluorine atom. 
       
     
     
         10 . The non-aqueous liquid electrolyte as defined in  claim 9 , wherein in formula (I), n and m are integers different from each other. 
     
     
         11 . The non-aqueous liquid electrolyte as defined in  claim 9 , wherein in said non-aqueous liquid electrolyte, the concentration of said compound represented by formula (I) is 5 volume % or higher, and 95 volume % or lower. 
     
     
         12 . The non-aqueous liquid electrolyte as defined in  claim 9 , wherein in said non-aqueous liquid electrolyte, the concentration of said saturated cyclic carbonate is 5 volume % or higher, and 50 volume % or lower. 
     
     
         13 . A non-aqueous liquid electrolyte secondary battery comprising a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and a non-aqueous liquid electrolyte, the anode electrode containing a anode electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom,
 wherein said non-aqueous liquid electrolyte is the non-aqueous liquid electrolyte defined in  claim 1 .   
     
     
         14 . A non-aqueous liquid electrolyte secondary battery comprising a anode electrode and a cathode electrode, capable of intercalating and deintercalating lithium ions, and a non-aqueous liquid electrolyte, the anode electrode containing a anode electrode active material having at least one kind of atom selected from the group consisting of Si atom, Sn atom and Pb atom,
 wherein said non-aqueous liquid electrolyte is the non-aqueous liquid electrolyte defined in  claim 9 .