▎ 摘　　要

NOVELTY - Electric conductive aqueous binder comprises electric conductive graphene, carbon nanotube, crosslinked polymer and multivalent metal ion solution salt solution. The graphene, carbon nanotube and crosslinked polymer form a three-dimensional conductive network structure after chemical bond. The crosslinked polymer and polyvalent metal ion solution salt solution form a 3-dimensional crosslinking network structure. USE - The electric conductive aqueous binder is useful in lithium ion battery. ADVANTAGE - The electric conductive aqueous binder: can be applied in lithium ion battery with high energy density, long cycle, fast charging and high safety. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparation of the electric conductive aqueous binder, comprising adding crosslinked polymer into functional group containing graphene and carbon nanotube, mixing to form an electric conductive polymer mixture, adding multivalent metal ion salt solution, and stirring for crosslinking reaction; and (2) a lithium ion battery, comprising cathode pole piece, anode pole piece, a separator, an electrolyte and a shell. The cathode pole piece comprises electric conductive aqueous binder and anode electrode active material mixed with sizing agent by coating and drying.