Spraying glue for battery diaphragm, application of spraying glue, battery diaphragm spraying slurry and battery diaphragm

Abstract

The invention relates to spraying glue for a battery diaphragm, application of the spraying glue, battery diaphragm spraying slurry and the battery diaphragm, and belongs to the technical field of battery adhesives. The technical problem to be solved by the invention is to provide the spraying glue for the battery diaphragm, which is not easy to fall powder and has good bonding performance with a pole piece. The spraying glue comprises a graft polymer, the graft polymer takes an acrylonitrile polymer as a main chain, polymer latex particles are grafted, and the weight percentage of the polymer latex particles in the graft polymer is 65-85%. The spraying glue for the battery diaphragm is sprayed on the battery diaphragm, so that the phenomenon that the existing acrylonitrile multipolymer is easy to fall powder can be improved, the bonding strength between the battery diaphragm and a substrate and between the battery diaphragm and a pole piece can be improved on the premise of keeping a relatively good hollow structure, and the cold pressing bonding performance between the sprayed diaphragm and a positive electrode and a negative electrode of a battery is good. The spraying glue for the battery diaphragm is simple in preparation method, is prepared by taking water as a solvent, is green and environment-friendly, is relatively low in cost, and can be industrially produced.

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