US 8,999,582 B2 · Positive electrode material for lithium-ion accumulator

Abstract

A composition including (a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminum and (b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon. In the composition, the proportion by mass of the lithiated oxide of transition metals containing at least nickel, cobalt and aluminum is less than or equal to 10% of the weight of the composition, and the proportion by mass of the lithiated phosphate of at least one transition metal is greater than or equal to 90% of the weight of the composition. A lithium-ion or lithium-polymer type accumulator including at least one positive electrode containing this composition.

Claims28

Dependent claims

Composition comprising:

a) a lithiated oxide of transition metals containing at least nickel, cobalt and aluminium;
and
b) a lithiated phosphate of at least one transition metal, the surface of which is at least partially covered by a layer of carbon, wherein
the proportion by mass of the lithiated oxide is equal to 10% of the weight of the composition;
the proportion by mass of the lithiated phosphate is equal to 90% of the weight of the composition;
the lithiated oxide has the formula Liw(Nix,Coy,Alz)O2, where
w ranges from 0.9 to 1.1,
0.75≦x≦0.85,
0.10≦y≦0.20,
0.02≦z≦0.15, and
x+y+z=1;
and
the lithiated phosphate has the formula LiaFebPcO4-t, where
a, b and c range from 0.9 to 1.1, and
t is less than or equal to 0.4.

12 more elements

Dependencies are inferred from the claim text.

Positive electrode material for lithium-ion accumulator

Life of this patent

Positive electrode material for lithium-ion accumulator

Life of this patent

Abstract

Claims28