Preparation method of nano microcapsule inhibitor of active fire-fighting lithium battery

The invention provides a preparation method of a nano microcapsule inhibitor of an active fire-fighting lithium battery, which comprises the following steps: dissolving sodium caseinate and D-lactose hydrate as wall materials in deionized water, adding a fluorocarbon organic solvent as a core material, and reacting to obtain a nano microcapsule inhibitor emulsion; and standing and layering the nano microcapsule inhibitor emulsion, and freeze-drying the lower precipitate to obtain the nano microcapsule inhibitor. The nano microcapsule inhibitor disclosed by the invention is added into an electrolyte to obtain a lithium battery with active fire-fighting response. The method is simple and easy to implement, and the prepared microcapsule inhibitor is nanoscale, good in dispersity and easy to be uniformly doped with electrolyte; the addition amount of the nano-scale microcapsule inhibitor in the electrolyte is increased, so that the electrochemical performance of the electrolyte is not influenced while a better fi