Preparation method of AgX@Ag core-shell electrode material

The invention belongs to the technical field of electrode preparation and particularly relates to a preparation method of an AgX@Ag core-shell electrode material. AgX is pretreated by using polyethylene glycol; surface modification is performed on AgX by utilizing a sulfhydryl silane coupling agent; AgX nucleation is uniformly dispersed; a shape is regular, granularity is small, agglomeration is not generated, and a surface is rich in sulfydryl active sites; a silver ammonia solution is slowly restored by using a weak reducing agent glucose to obtain silver ions; and in a silver reduction process, silver particles can carry out heterogeneous nucleation at the active sites preferentially, and then a reduced silver crystal nucleus grows directionally on the surface of AgX so as to form a silver particle coated compact AgX@Ag core-shell material. A principle is scientific and reliable, a mixing degree of Ag and AgX is improved from the perspective of liquid-phase synthesis of the preparedAgX@Ag core-shell material, Ag and AgX are subjected to coating contact and a contact degree of mechanical mixing is greatly exceeded, and the better contact degree and smaller electrode particles are possessed.