Graphene coating agent and preparation method for producing super lead-acid storage battery negative electrode plate from graphene coating agent

The present invention discloses a graphene coating agent and a preparation method for producing a super lead-acid storage battery negative electrode plate from the graphene coating agent. The preparation method comprises: adding 20-120 parts by weight of graphene, 1-6 parts by weight of sodium ligninsulfonate (SLS), 5-10 parts by weight of a hydrogen evolution inhibitor, and 1000 parts by weight of water to a stirring tank, carrying out high speed and uniform stirring, adding 10-30 parts by weight of a binder and 500 parts by weight of water to another stirring tank, uniformly stirring, mixing the two mixtures, adding 300-1000 parts by weight of water, and carrying out high speed and uniform stirring to prepare the graphene coating agent; uniformly coating the graphene coating agent on both sides of a storage battery negative electrode generating plate, wherein the weight of the graphene coating agent is 0.25-2.5% of the gram weight of the negative electrode plate generating sheet; and closely wrapping with plate coating paper, flattening, pressing, laminating, compacting, carrying out cutting stacking, and drying for 2-4 h at a temperature of 60-100 DEG C. According to the present invention, the graphene coating agent is uniformly adhered on both sides of the lead-acid storage battery raw electrode plate, the adhesion reliability is high, the graphene coating agent is not easily shed, the battery charging time is reduced, and the specific energy, the cycle life, the high-current charge-discharge performance and the high power capacity of the battery are improved.