Pole piece, secondary battery, and electronic device

Abstract

The application discloses a pole piece, a secondary battery and an electronic device. The pole piece comprises a first metal layer, a second metal layer and an insulating layer stacked between the first metal layer and the second metal layer. The first metal layer is provided with a plurality of first holes, the second metal layer is provided with a plurality of second holes, and the insulating layer is provided with a plurality of third holes. The first holes, the second holes and the third holes are used for transmitting ions. A first active material layer is arranged on a surface of the first metal layer away from the insulating layer, a second active material layer is arranged on a surface of the second metal layer away from the insulating layer, and the first active material layer and the second active material layer have opposite polarities. The pole piece further comprises an isolation layer stacked on a surface of the first active material layer away from the first metal layer, or stacked on a surface of the second active material layer away from the second metal layer. The manufacturing process of the secondary battery can be simplified, the overhang area can be reduced while reducing the risk of lithium precipitation, and the energy density of the secondary battery can be improved.

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