Negative Electrode Sheet, Secondary Battery, and Electrical Device

A secondary battery, comprising a negative electrode sheet that comprises:

• a negative current collector;
• and
• a negative electrode active material layer, wherein the negative electrode active material laver is arranged on a surface of the negative current collector, and the negative electrode active material layer comprises a negative electrode active material and an additive having compression and rebound properties,
• wherein based on a pressure X being applied in a thickness direction of the negative electrode sheet, a rebound rate of the negative electrode sheet is 2% to 40%, and a compression rate of the negative electrode sheet is 2% to 40%;
• and the pressure X satisfies the following:
• 0.3 Mpa≤X≤5 Mpa.

An electrical device, comprising the secondary battery, wherein the secondary battery comprises a negative electrode sheet that comprises:

• a negative current collector;
• and
• a negative electrode active material laver, wherein the negative electrode active material laver is arranged on a surface of the negative current collector, and the negative electrode active material laver comprises a negative electrode active material and an additive having compression and rebound properties,
• wherein based on a pressure X being applied in a thickness direction of the negative electrode sheet, a rebound rate of the negative electrode sheet is 2% to 40%, and a compression rate of the negative electrode sheet is 2% to 40%;
• and the pressure X satisfies the following:
• 0.3 Mpa≤X≤5 Mpa.