Positive electrode sheet and application thereof

Abstract

A positive electrode sheet and application thereof, where the positive electrode sheet includes a positive electrode current collector, an undercoat layer and a positive electrode active layer, the undercoat layer being located on at least one surface of the positive electrode current collector, and the positive electrode active layer being located on a surface of the undercoat layer far away from the positive electrode current collector; where, the undercoat layer includes a first carbon material, and a powder resistivity of the first carbon material is not lower than 0.2 Ω·cm. The undercoat layer included in the positive electrode sheet of the present application has high impedance, and when mechanical abuse occurs, the lithium-ion battery is not prone to thermal runaway, effectively improving the safety of battery.

Dependencies are inferred from the claim text.