High voltage cathode compositions for lithium-ion batteries

Abstract

A lithium transition metal oxide composition. The composition has the formula Li a [Li b Ni c Mn d Co e ]O 2 , where a≧0.9, b≧0, c>0, d>0, e>0, b+c+d+e=1, 1.05≦c/d≦1.4, 0.05≦e≦0.30, 0.9≦(a+b)/M≦1.06, and M=c+d+e. The composition has an O3 type structure.

1 - 5 . (canceled) 
     
     
         6 . A lithium transition metal oxide composition having the formula Li a [Li b Ni c Mn d Co e ]O 2 , where a≧0.9, b≧0, c>0, d>0, e>0, b+c+d+e=1, 0.5≦c/d≦0.95, 0.0≦e≦0.30, 1.1≦(a+b)/M≦1.4, and M=c+d+e;
 wherein the composition has an O3 type structure. 
 
     
     
         7 . A lithium transition metal oxide composition according to  claim 6 , where 0.65≦c/d≦0.9 and 0.0≦e≦0.25 and 1.1≦(a+b)/M≦1.4. 
     
     
         8 . A lithium transition metal oxide composition according to  claim 6 , where 0.6≦c/d≦0.75 and 0.0≦e≦0.10 and 1.1≦(a+b)/M≦1.4. 
     
     
         9 . A lithium transition metal oxide composition according to any one of  claims 6 - 8 , wherein the composition is in the form of a single phase. 
     
     
         10 . A lithium transition metal oxide composition according to any one of  claims 6 - 9 , wherein the composition delivers composited volumetric energy higher than 2200 Wh/L within 2.5-4.7V vs. Li/Li+ at 30° C. using 1C (C=200 mAh/g) rate discharge. 
     
     
         11 . A method of making a cathode composition, the method comprising:
 combining precursors of the compositions according to any one of the preceding claims; and   heating the precursors to make the cathode composition.   
     
     
         12 . A lithium-ion battery comprising: an anode; a cathode comprising a composition according to any one of claims  1 - 10 ; and an electrolyte.