Negative pole piece and preparation method thereof, lithium battery and electric device

The invention discloses a negative pole piece and a preparation method thereof, a lithium battery and an electric device, and relates to the technical field of secondary batteries. The adhesive on the negative electrode plate is optimized, and the fluorinated polyacrylic acid and the butadiene styrene rubber are used as the adhesive, so that a thin and uniform SEI layer can be constructed on the silicon negative electrode together with carbonate electrolyte. In the initial charging process, the fluorinated polyacrylic acid forms an SEI layer containing LiF on the silicon negative electrode, and the stability of the electrode is remarkably improved through volume expansion of accommodating silicon. Due to the improvement of the structural stability, the electrochemical performance of the silicon anode under the condition of low content (such as 3% wt) of FEC additive is remarkably improved, so that the risk that the high-temperature performance of the battery is degraded due to the high-temperature instability