ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

An electrochemical device, including a cathode, an anode and an electrolyte. The anode includes an anode current collector and an anode active material disposed on the anode current collector, the electrolyte includes fluoroethylene carbonate, and the electrochemical device meets the following relationship: 17.55≤K−K−1.63K+11.27K≤20.80, where Krepresents a specific surface area value of the unit mass of the anode active material (in m/g), and 1.0≤K≤2.0; Krepresents a content value of the fluoroethylene carbonate required by per Ah capacity (in g/Ah), and 0.05≤K≤0.25; and Krepresents a weight value of the anode active material required by per Ah capacity (in g/Ah).