Composite cathode active material, cathode and lithium battery employing same, and method for manufacturing same

Abstract

Provided are a composite cathode active material, a cathode and a lithium battery that include the same, and a method of preparing the composite cathode active material, the composite cathode active material comprising: a core; and a first shell and a second shell that are disposed on an outer side of a surface of the core, wherein the first shell includes at least one first metal compound represented by Formula XaOb (where 0<a≤3, 0<b≤4, and when a is 1, 2, or 3, b is an integer) or Formula Xa(OH)b (where 0<a≤3, 0<b≤4, and when a is 1, 2, or 3, b is an integer), the second shell includes at least one second metal compound represented by Formula YcOd (where 0<c≤3, 0<d<4, and when c is 1, 2, or 3, d is not an integer); and graphene, the at least one second metal compound is disposed in a graphene matrix, X and Y are each independently a metal selected from Groups 2 to 13, 15, and 16 of the Periodic Table of Elements.

Dependencies are inferred from the claim text.