Electrolyte additive for non-aqueous electrochemical cells

Abstract

An electrochemical secondary cell is disclosed. The cell includes a cathode, an anode, a current collector including aluminum, and an electrolyte containing a perchlorate salt and a second salt. The electrolyte is essentially free of LiPF 6 .

1 - 42 . (canceled)  
     
     
         43 . A method of inhibiting aluminum corrosion in an electrochemical cell, the method comprising: 
 (a) adding a lithium perchlorate salt and a lithium salt selected from the group consisting of LiTFS, LiTFSI, and LiPF 6  to an electrolyte; and    (b) placing the electrolyte, an anode, a cathode, and an aluminum current collector into a cell case to form the cell, wherein the cell is a primary electrochemical cell.    
     
     
         44 - 47 . (canceled)  
     
     
         48 . The method of  claim 43 , wherein the anode contains lithium.  
     
     
         49 . The method of  claim 43 , wherein the cathode contains MnO 2 .  
     
     
         50 . The method of  claim 43 , wherein the method comprises adding at least 500 ppm by weight of the lithium perchlorate to the electrolyte.  
     
     
         51 . The method of  claim 43 , wherein the method comprises adding at least 1000 ppm by weight of the lithium perchlorate to the electrolyte.  
     
     
         52 . The method of  claim 43 , wherein the method comprises adding at least 1500 ppm by weight of the lithium perchlorate to the electrolyte.  
     
     
         53 . The method of  claim 43 , wherein the method comprises adding at least 2500 ppm by weight of the lithium perchlorate to the electrolyte.  
     
     
         54 . The method of  claim 43 , wherein the method comprises adding less than 20,000 ppm by weight of the lithium perchlorate to the electrolyte.  
     
     
         55 . The method of  claim 43 , wherein the cell case comprises aluminum.  
     
     
         56 . The method of  claim 55 , wherein the cell case consists essentially of aluminum.  
     
     
         57 . The method of  claim 43 , wherein the method comprises adding at least 5000 ppm by weight of LiPF 6  to the electrolyte.  
     
     
         58 . The method of  claim 43 , wherein the method comprises adding at least 10,000 ppm by weight of LiPF 6  to the electrolyte.  
     
     
         59 . The method of  claim 43 , wherein the method does not comprise adding LiPF 6  to the electrolyte, and the electrolyte is essentially free of LiPF 6 .