| abstract |
The present invention (a) an electrode; And (b) a porous active layer coated on at least one surface of the electrode and formed of a mixture of a plurality of inorganic particles and a binder polymer, wherein the porous active layer has a content ratio of binder polymer / inorganic particles present on a surface thereof. An electrode coated with a porous active layer, a method of manufacturing the same, and a porous active layer, wherein the porous active layer has a heterogeneity of composition morphology in a thickness direction greater than a content ratio of binder polymer / inorganic particles present therein. It provides an electrochemical device provided. Electrode coated with a porous active layer of the present invention is a porous by introducing a porous active layer having a heterogeneous morphology in which the content ratio of the binder polymer / inorganic particles of the surface layer is greater than the internal content ratio on at least one surface of the cathode, anode or positive electrode, It is possible to increase resistance to peeling and scratching of the active layer and to improve lamination properties with the porous separator. As a result, the problem that the inorganic particles in the porous active layer are detached during the assembly of the electrochemical device can be improved, thereby improving battery safety and performance. |