ELECTRODE SHEET AND PREPARATION METHOD THEREFOR, BATTERY CELL, BATTERY, AND ELECTRIC DEVICE

The electrode sheet includes a current collector, an active material layer, a first insulating layer, and a second insulating layer. The current collector includes a body portion and a tab extending from a first end of the body portion. The body portion includes a coated region and a transition region provided between the coated region and the tab; the active material layer is provided on a surface of the coated region; the first insulating layer is provided on an end surface of the body portion; at least part of the second insulating layer is provided on a surface of the transition region; the second insulating layer includes a first thermoplastic polymer and a second thermoplastic polymer.