ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

This application relates to an electrochemical apparatus and an electronic apparatus. The electrochemical apparatus of this application includes a positive electrode, a negative electrode, a separator, and an electrolyte, where the positive electrode includes a positive electrode current collector, a positive electrode active substance layer, and a conductive coating disposed between the positive electrode current collector and the positive electrode active substance layer; the electrolyte includes a first fluorine-containing metal salt, where the first fluorine-containing metal salt includes at least one of fluorine-containing sulfonimide lithium salts; and the electrochemical apparatus satisfies the following relationship: 0.1≤X/d≤105, where X g/m2 is mass per unit area of fluorine-containing sulfonimide lithium salt contained in the electrochemical apparatus on one surface of the positive electrode current collector, and d µm is thickness of the conductive coating on one surface of the positive electrode current collector. A combination of the conductive coating of the positive electrode and organic lithium salts in the electrolyte in this application can not only improve high-rate cycling performance of the electrochemical apparatus and reduce temperature rise of the electrochemical apparatus but also alleviate possible corrosion on the positive electrode current collector by the organic lithium salts and enhance long-term stability of the electrochemical apparatus.