Electrode sheet and lithium-ion battery

Abstract

The present disclosure provides an electrode sheet and a lithium-ion battery. A first aspect of the present disclosure provides an electrode sheet, including a current collector, and a first active layer and a second active layer which are sequentially stacked on a surface of the current collector; where, the first active layer is provided with a first groove, the second active layer is provided with a second groove, and a vertical projection of the second groove on the current collector covers a vertical projection of the first groove on the current collector; a tab is disposed at the first groove and is electrically connected with the current collector. The electrode sheet provided by the present disclosure effectively improves the charging risk at a tab connection position and increases the cycle retention rate of the lithium-ion battery under the condition of maintaining high-rate charging.

Dependencies are inferred from the claim text.