Positive electrode material for lithium secondary battery

A positive electrode material being a composite lithium material comprising:

• a first lithium compound in the form of particles, the first lithium compound comprising a layered lithium compound, a spinel-type lithium compound, or a combination thereof, wherein the first lithium compound forms a core;
• a first carbon material layer present on an entire surface of the first lithium compound particles, wherein the first carbon material layer forms a first shell on the core;
• a second lithium compound forming a thin-film layer on part or the entirety of a surface of the first carbon material layer, the second lithium compound comprising a lithium-containing phosphate compound, a lithium-containing silicate compound, or a combination thereof, wherein the second lithium compound thin-film layer forms a second shell on the first shell;
• and
• a second carbon material layer present on an entire surface of the thin film layer of the second lithium compound, wherein the second carbon material layer forms a third shell on the second shell,
• wherein the carbon material of the first and second carbon material layers is independently selected from amorphous carbon material, graphene-structured carbon material, or a combination thereof;
• and
• wherein the first and second lithium compounds are not in direct physical contact.