ELECTROCHEMICAL APPARATUS AND ELECTRONIC APPARATUS CONTAINING THE ELECTROCHEMICAL APPARATUS

An electrochemical apparatus includes a positive electrode, a separator and a negative electrode. The negative electrode includes a negative current collector, a negative active material layer and a negative tab, and the negative tab is arranged on a side edge of a long axis of the negative current collector and is in contact with the negative active material layer. The negative active material layer includes a silicon-based material, a distance between a central position of the negative tab and either end of the negative active material layer in a long axis direction is a first length, a length of a long axis of the negative active material layer is a second length, and 0.5≥D≥0.6×G, where D is a ratio of the first length to the second length, G is a weight percentage of the silicon-based material. The weight percentage of the silicon-based material is less than or equal to 70%.