Patent ID: 10797306

Abstract:
Provided is an impact-transfer method of producing multiple anode particulates for a lithium battery, the method comprising: (a) mixing multiple particles of a graphitic material, multiple polymer-coated porous primary anode active material particles, with or without the presence of externally added milling balls or beads, to form a mixture in an impacting chamber of an energy impacting apparatus; (b) operating the energy impacting apparatus for peeling off graphene sheets from the particles of graphitic material and transferring the peeled graphene sheets to surfaces of the polymer-coated anode active material particles to produce particulates of graphene-encapsulated polymer-coated porous anode active material particles; (c) recovering the particulates from the impacting chamber and separating the particles of ball-milling media from the particulates; and (d) thermally converting the polymer in the polymer-coated particles into a carbon foam to obtain porous, graphene-encapsulated carbon foam-protected anode particles.