NEGATIVE ELECTRODE PLATE, ELECTROCHEMICAL DEVICE, AND ELECTRONIC DEVICE

An electrochemical device includes a negative electrode plate, the negative electrode plate includes a current collector, a first active material layer, and a second active material layer. The first active material layer is located between the current collector and the second active material layer. The first active material layer includes a silicon-based material. The second active material layer includes lithium titanium oxide. An average particle diameter of the lithium titanium oxide is 1 nm to 1500 nm. By virtue of a stable structure, the lithium titanium oxide generates almost zero strain during cycles of the electrochemical device, incurs few side reactions with an electrolytic solution, and suppresses reactivity between a silicon-based material particle in the underneath first active material layer and the electrolytic solution, thereby reducing cycle expansion of the electrochemical device.