PREPARATION METHOD FOR FLUORIDE ION ADSORBENT

Provided is a preparation method for a fluoride ion adsorption material, relating to the technical field of battery recycling. A preparation method for a fluoride ion adsorbent comprises: obtaining a first mixture containing a negative electrode graphite material from a lithium ion battery, and performing wet acid leaching on the first mixture to obtain leaching residue containing the negative electrode graphite material; roasting the leaching residue in an alkaline environment to obtain roasting residue; preparing slurry from the roasting residue and a second mixture, and performing metal precipitation in an alkaline environment, wherein the second mixture contains a manganese salt, an aluminum salt, and meta-aluminate; aging and filtering the slurry, washing a filter cake until the filter cake is neutral, and drying to obtain a metal hydroxide-carbon complex; and roasting the metal hydroxide-carbon complex. According to the preparation method, a waste battery negative electrode material can be used as a res