Electrode active material for secondary battery and method of manufacturing same

Abstract

The present application provides an electrode active material having excellent electrical conductivity and ionic conductivity as well as excellent mechanical flexibility by forming a unique conductive polymer layer on an active material core, while preventing side reactions between the active material core and an electrolyte from occurring, and an electrode comprising the same. Accordingly, it is possible to provide a lithium secondary battery having an excellent capacity retention ratio (lifetime characteristics) according to charging/discharging while having a high energy density. The conductive polymer layer includes a thiophene-based polymer having one or more functional groups selected from the group consisting of a carboxyl group, a hydroxyl group, an amine group, a nitro group, an ether group, a carbonyl group and a flowable functional group.