▎ 摘　　要

NOVELTY - The method involves disposing a polyacid solution having a pH of 1-2, and dissolving the graphene oxide in the configured polyacid solution. The obtained dispersion system is used as an electrodeposition liquid. The copper foil is deposited in an electrodeposition liquid to deposit a polyacid-graphene composite film on the surface of the copper foil. The polyacid- The graphene composite membrane is immersed in LiOH solution is prepared to fully react hydrogen ions and hydroxide ions to complete the exchange of hydrogen ions and lithium ions to obtain a lithium acid salt-graphene composite membrane. The lithium acid salt-graphene composite film is cleaned and dried. USE - Method for preparing electrodeposited graphene film lithium ion battery negative electrode sheet. ADVANTAGE - The prepared polyacid lithium salt graphene composite film is cleaned and dried, and the negative electrode piece prepared by the method is compact and uniform, and the electrodeposition time is short, which is favorable for the improvement of production efficiency.