Abstract: A two-phase positive electrode material for a lithium battery in which particles of lithium-enriched layered oxide of formula Li1+x(MnaNibMc)1?xO2 are at least partially coated on the surface with a metal oxide of formula LiyVOz. Such a material is advantageously produced by mixing the lithium-enriched lamellar oxide with at least one precursor of the metal oxide in aqueous solution, followed by thermal treatment at a temperature no lower than 280° C.

Abstract: The invention relates to a two-phase positive electrode material for a lithium battery, which includes particles of a lithium-enriched lamellar oxide, the surface of which is at least partially covered by a metal oxide having formula LiyVOz, wherein 0<y<3 and 2.5<z<4. The lithium-enriched lamellar oxide has the following specific formula Li1+x(MnaNibMc)1?x02, wherein: 0.1<x<0.25; a+b+c =1, a, b and c having non-zero values; and M is a metal selected from the group comprising Mg, Zn, Al, Na, Ca, K. Such a material is advantageously produced by mixing the lithium-enriched lamellar oxide with at least one precursor of the metal oxide placed in aqueous solution, followed by a step comprising thermal treatment at a temperature no lower than 280° C.