▎ 摘　　要

NOVELTY - Forming graphene, comprises: (a) wrapping graphite positive electrode (21) in semipermeable membrane (9); (b) dipping positive electrode and negative electrode (3) into acidic electrolyte (5); (c) conducting electrolysis, so that first graphene oxide having size larger than pore size of semipermeable membrane is exfoliated from positive electrode; (d) continuously conducting electrolysis process until second graphene oxide is split from first graphene oxide; (e) collecting second graphene oxide diffused into electrolyte outside of membrane; and (f) chemically reducing second graphene oxide. USE - The methods are useful for forming graphene. ADVANTAGE - The methods provide high quality and high yield graphene by only electrolysis step without any mechanical processes. DETAILED DESCRIPTION - Forming graphene, comprises: (a) wrapping a graphite positive electrode (21) in a semipermeable membrane (9); (b) dipping the graphite positive electrode wrapped in the semipermeable membrane and a negative electrode (3) into an acidic electrolyte (5); (c) conducting an electrolysis process, so that a first graphene oxide having a size larger than a pore size of the semipermeable membrane is exfoliated from the graphite positive electrode; (d) continuously conducting the electrolysis process until a second graphene oxide is split from the first graphene oxide, where the second graphene oxide has a size which is smaller than the pore size of the semipermeable membrane to penetrate through the semipermeable membrane; (e) collecting the second graphene oxide diffused into the acidic electrolyte outside of the semipermeable membrane; and (f) chemically reducing the second graphene oxide to obtain a graphene. An INDEPENDENT CLAIM is also included for forming graphene, comprising: wrapping a graphite material (23) and a positive electrode in a semipermeable membrane; dipping the graphite material and the positive electrode wrapped in the semipermeable membrane and a negative electrode into an acidic electrolyte; conducting an electrolysis process, so that a first graphene oxide having a size larger than a pore size of the semipermeable membrane is exfoliated from the graphite material; and (d)-(f) as above per se. DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of an apparatus for electrolyzing graphite to from graphene oxide. Negative electrode (3) Acidic electrolyte (5) Semipermeable membrane (9) Positive electrode (21) Graphite material (23)