NOVELTY - An electrode comprises interconnected electrode active material particles applied on current collector. The interconnected surface of electrode active material particles is coated with a polymer. The polymer is present as an independent phase, while maintaining a pore structure formed among the interconnected electrode active material particles.    USE - For manufacturing electrochemical device, particularly lithium secondary battery (claimed).    ADVANTAGE - The invention can improve the safety of a battery, and prevents degradation of battery performance.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (A) an electrochemical device comprising anode, and separator interposed between electrodes and electrolyte;    (B) a method for manufacturing an electrode coated with a polymer present on an interconnected surface of electrode active material as an independent phase comprising coating a slurry for an electrode including an electrode active material on a current collector and drying it to form an electrode, and dipping the electrode obtained into a solution containing the polymer; and    (C) a method for manufacturing an electrochemical device comprising coating slurry for electrode including an electrode active material on a collector and drying it to form an electrode, dipping the resultant electrode into a solution containing a polymer to provide an electrode coated with the polymer present on the interconnected surface of electrode active material as an independent phase while maintaining a pore structure formed material particles, and forming an assembly using electrode and separator; and injecting a liquid electrolyte into the assembly.    The cathode, anode, or electrodes are coated with a polymer present on an interconnected surface of electrode active material as an independent phase while maintaining a pore structure formed among the interconnected electrode active material particles.    DESCRIPTION OF DRAWING(S) - The figure is a schematic view showing a process for manufacturing an electrode coated with a polymer as an independent phase and the structure of electrode active material formed.