NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE

A negative electrode plate includes: a current collector; and an active material layer, located on the current collector. The active material layer includes a silicon-based material, a carbon material, and a binder. Silicon mass fractions in two places of the active material layer are Xand X; the two places cover a same area but are located in different positions, X≥X, M=X/X, and M≥0.7. Lithium mass fractions in the two places are Yand Y, respectively; the two places cover the same area but are located in different positions, Y≥Y, N=Y/Y, and N≥0.5. Also, uniformity of deintercalation and intercalation of lithium is enhanced by improving the dispersion uniformity of silicon in the active material layer, thereby alleviating volume expansion of the silicon-based material during cycling, and enhancing cycle performance and safety performance of the electrochemical device