▎ 摘　　要

NOVELTY - Emulsion binder obtained by substitution of at least two hydrogen atoms at 2, 3, 4, 5, and 6 positions on the benzene ring structure of styrene by halogen atoms in polymerization of polyhalogenated styrene and 1,3-butadiene, is claimed. The modified polyhalogenated styrene is di-modified polyhalogenated styrene, tri-modified polyhalogenated styrene, tetra-modified polyhalogenated styrene or fully modified polyhalogenated styrene. USE - The binder and lithium-ion battery is useful in conjunction with sodium carboxymethyl cellulose to adhering the cathode active material to the current collector copper foil (claimed). ADVANTAGE - The binder: enhances the bonding force between the halogen atoms with strong polarity, graphite powder and metal base material; improve the adhesion force; reduce the interface impedance of the battery caused by high polymer adhesive and electrochemical internal resistance; and the lithium ion battery has excellent electrochemical performance. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing the emulsion binder comprising (i) adding water in the dosing tank, nano conductive agent, coating agent, emulsifying agent, molecular weight regulator and crosslinking agent, dispersing uniformly to prepare into aqueous phase pre-emulsion, (ii) during first stage polymerization, vacuumizing the polymerization kettle, adding part of aqueous phase pre-emulsion prepared in the resultant step, water, modified poly-halogenated styrene, 1, 3-butadiene and initiator, heating to 75-85degrees Celsius, reacting for many hours, during the second stage polymerization, raising the temperature to 88-92degrees Celsius, continuously adding 1,3- butadiene, modified poly-halogenated styrene, initiator and residual aqueous phase pre-emulsion, reacting for many hours, during the third section polymerization, raising the temperature to 95plus minus0.5degrees Celsius, keeping the temperature and reacting for many hours, adding termination agent to stop the reaction, (iii) reducing the temperature to 85degrees Celsius or less, adding anti-aging agent, stirring, reducing the temperature to 40plus minus0.5degrees Celsius, adding alkali liquid, adjusting the pH value to 8.5-9.5 to obtain finished product; and; (2) a lithium-ion battery, where the negative plate of the lithium-ion battery is coated with the adhesive.