Oxide mixture and complex oxide coatings for cathode materials

Abstract

Cathode active materials are provided. The cathode active material can include a plurality of cathode active compound particles. A coating is disposed over each of the cathode active compound particles. The coating can include at least one of ZrO2, La2O3, a mixture of Al2O3 and ZrO2 or a mixture of Al2O3 and La2O3. The battery cells that include the cathode active material are also provided.

1 - 17 . (canceled) 
     
     
         18 . A cathode active material comprising:
 a plurality of cathode active compound particles; and   a coating disposed over each of the cathode active compound particles, the coating comprising a Zn and Al-containing oxide.   
     
     
         19 . The coated cathode active material of  claim 18 , wherein the oxide comprises ZnAl 2 O 4 . 
     
     
         20 . The cathode active material of  claim 18 , wherein the cathode active compound particles comprise a compound of Formula (IXb):
   (ν)[Li 2 M 7 O 3 ]·(1−ν)[Li α Co 1−σ M 8   σ O 2 ]  (IXb)
   
       wherein
 M 7  is selected from Mn, Ti, Zr, and Ru; 
 M 8  is selected from B, Na, Mg, Ti, Ca, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Al, Sc, Y, Ga, Zr, Ru, and Mo; 
 0.95≤α≤1.05; 
 0.01≤ν≤0.10; and 
 0≤α≤0.05. 
 
     
     
         21 . The cathode active material of  claim 20 , wherein 0.95≤α<0.99. 
     
     
         22 . The cathode active material of  claim 20 , wherein the cathode active compound particles comprise a compound of Formula (X):
   Li α Co 1−x−y M y Mn x O δ   (X)
   
       wherein
 M is at least one element selected from the group consisting of B, Na, Mg, Ti, Ca, V, Cr, Fe, Co, Ni, Cu, Zn, Al, Sc, Y, Ga, Zr, Ru, and Mo; 
 0.95≤α≤1.05; 
 0<x≤0.30; 
 0≤y≤0.10; and 
 1.98≤δ≤2.04. 
 
     
     
         23 . The cathode active material of  claim 22 , wherein 0.95≤α<0.99. 
     
     
         24 . A battery cell, comprising:
 an anode comprising an anode current collector,   the cathode comprising the coated cathode active material according to  claim 18 ; and   a separator disposed between the anode and the cathode.