▎ 摘　　要

NOVELTY - Preparation of binder involves: (S1) adding polyurethane prepolymer to a reaction kettle containing N,N-dimethylacetamide as a solvent, stirring until it is completely dissolved, adding dibutyltin dilaurate as a catalyst, heating to 75-90°C, dripping prepared maleimide polyethylene glycol solution into the kettle, and stirring for 2-5 hours to obtain a maleimide polyurethane solution; and (S2) adding silicon-based material containing large number of hydroxyl active groups to the maleimide polyurethane solution, cooling to 50-70°C, continuously stirring for 1-3 hours, adding silane coupling agent modified conductive agent to reaction kettle, adding azobisisobutyronitrile as an initiator, stirring, and reacting for 5-10 hours. USE - Preparation of adhesive for silicon-based negative electrode of lithium battery (claimed). ADVANTAGE - The method provides binder, which can relieve the volume expansion of the silicon-based material and improve the conductivity of the silicon-based material.