ELECTROCHEMICAL DEVICE AND ELECTRONIC DEVICE

The present application provides an electrochemical device and an electronic device. The electrochemical device comprises an electrode assembly. The electrode assembly comprises a negative electrode plate; the negative electrode plate comprises a negative current collector and a negative electrode active layer located on the surface of the negative current collector; the width of the negative electrode active layer is Ha; along a width direction of the negative electrode active layer, the negative electrode active layer comprises a first edge and a second edge which are opposite to each other; the negative electrode plate comprises a first area and a second area; the first area is an area from the first edge to Ha/4 of the first edge; the second area is an area from Ha/4 of the first edge to 3Ha/4 of the first edge; the electrochemical device is disassembled in a state of charge of 50%; a charge transfer impedance of the first area per unit area is Rct1, and a charge transfer impedance of the second area per