Negative electrode sheet, secondary battery comprising same, and electric device

The invention discloses a negative plate, a secondary battery comprising the negative plate and an electric device, and belongs to the technical field of batteries. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer comprises a negative electrode active material, and the negative electrode plate meets the following relational expressions: 1g (WAl * WS/alpha) is greater than or equal to-1.75 and less than or equal to 1.05, and 1g (WS * R) + 0.15 * R is greater than or equal to 0.2 and less than or equal to 2.5; wherein WAl and WS are the mass ratio of the aluminum element to the mass ratio of the sulfur element respectively; alpha is a contact angle between the negative electrode active material layer and a mixed solvent of ethylene carbonate and ethyl methyl carbonate, and R is ion transmission impedance of the negative electrode plate. When the negative plate is applied to the secondary bat