Electrochemical device and electronic device including same

An electronic device comprising an electrochemical device comprising an aluminum-plastic film and an electrode assembly packaged in the aluminum-plastic film;

• wherein the electrode assembly comprises a cathode, a separator and an anode;
• wherein the cathode comprises:
• a cathode current collector;
• a first layer comprising a first material;
• a second cathode active material layer comprising a second cathode active material;
• wherein the first layer is disposed between the cathode current collector and the second cathode active material layer, and the first layer directly contacts the second cathode active material layer;
• wherein the first layer is directly disposed on a first region of a surface of the cathode current collector facing an anode active material layer of the anode;
• wherein the thickness of the first layer is greater than Dv50 of the first material;
• and
• an insulating layer disposed on a second region of the surface of the cathode current collector not facing the anode active material layer of the anode;
• and
• wherein a ratio of the thickness of the first layer to a thickness of the insulating layer is from 0.2 to 10.