Patent ID: 9564630
Date: 2017-02-07
CPC Classifications: H01M,Y02E,Y02P,Y02T

Claim:
1. A process for producing an anode active material-coated graphene sheet for a lithium battery, said process comprising: (a) providing a continuous film of a graphene material into a deposition zone; (b) introducing vapor or atoms of a precursor anode active material into said deposition zone and depositing said vapor or atoms onto a surface of said graphene material to form a coated continuous film of an anode active material-coated graphene material; (c) mechanically breaking said coated continuous film into multiple pieces of anode active material-coated graphene sheets, wherein said graphene sheet has two opposed parallel surfaces and at least 50% area of one of said surfaces is coated with an anode active material; and (d) shaping said multiple pieces of anode active material-coated graphene sheets into a secondary particle having a size less than 20 μm; wherein said graphene material is in an amount of from 0.1% to 99.5% by weight and said anode active material is in an amount of at least 0.5% by weight, all based on the total weight of said graphene material and said anode active material combined.