Battery having enhanced electrical insulation capability

A battery comprising:

• a cathode having a cathode active-material coating layer provided on at least one surface of a cathode collector;
• and an anode having an anode active-material coating layer provided on at least one surface of an anode collector, the cathode and anode being wound to face each other with a separator interposed therebetween,
• wherein the cathode active-material coating layer applied to the at least one surface of the cathode collector is longitudinally deviated from a cathode active-material coating layer applied to the other surface of the cathode collector such that application beginning and ending portions of both the cathode active-material coating layers are not consistent with each other, and only at least one of a winding beginning portion and winding ending portion of the cathode is provided with a cathode uncoated part for installation of a cathode lead,
• wherein an insulator tape is attached to a boundary of the cathode active-material coating layer at a position where the anode active-material coating layer faces a non-coating part of the cathode not containing the cathode active-material coating layer,
• wherein the cathode lead and an anode lead are arranged in opposite directions, and
• wherein at least one side of the cathode is not provided with the cathode uncoated part.