POSITIVE ELECTRODE AND LITHIUM BATTERY INCLUDING THE SAME

A positive electrode includes a composite material including a positive active material and a coating layer on a surface of the positive active material, wherein the coating layer includes a copolymer including a first repeating unit represented by Formula 1 below and a second repeating unit represented by Formula 2 below: wherein Ar, Rto R, A, A, Y, m, and n are the same as defined in the specification.