ENVIRONMENTALLY BENIGN PROCESS FOR PRODUCING GRAPHENE-PROTECTED ANODE PARTICLES FOR LITHIUM BATTERIES

摘要

Provided is an impact-transfer method of producing multiple porous anode particulates for a lithium battery, the method comprising: (a) mixing multiple particles of a graphitic material, multiple composite particles comprising primary anode active material particles dispersed in or bonded by a sacrificial material, optional milling balls 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 composite particles to produce particulates of graphene-encapsulated composite particles; (c) recovering the particulates from the impacting chamber; and (d) partially or completely removing the sacrificial particles from the particulates of graphene-encapsulated composite particles to obtain the multiple porous anode particulates.