Negative electrode plate and preparation method thereof, secondary battery, battery module, battery pack, and electrical apparatus

A preparation method of a negative electrode plate, comprising the following steps:

• preparing a silicon-based material, a conductive agent and a binder into negative electrode slurry;
• and coating the negative electrode slurry on at least one surface of a negative electrode current collector, and drying the coated negative electrode slurry to prepare a first negative electrode active material layer;
• wherein
• the first negative electrode active material layer comprise, by mass:
• 30% to 40% of the silicon-based material, 29.8% to 39.4% of the binder and 35% to 39.4% of the conductive agent, wherein the binder and the conductive agent form a porous conductive network;
• and the porous conductive network wraps the silicon-based material,
• on a section perpendicular to a thickness direction of the first negative electrode active material layer, an area ratio of the silicon-based material to the porous conductive network is 1:(1.3-1.5);
• wherein the silicon-based material comprises silicon monoxide,
• the binder comprises styrene butadiene rubber and polyacrylic acid,
• the conductive agent comprises artificial graphite, superconducting carbon, and carbon nanotubes;
• wherein based on a total mass of the binder, a mass percentage of styrene butadiene rubber is between 90 and 100, and a mass percentage of the polyacrylic acid is between 0 and 10.