Method of producing graphene
AssigneeCambridge Enterprise Limited
InventorsDerek Fray, Ali Kamali
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Abstract
A method of producing graphene sheets comprising the steps of, (a) forming a carbonaceous powder by electrochemical erosion of a graphite electrode in a molten salt comprising hydrogen ions, (b) recovering the resulting carbonaceous powder from the molten salt liquid, and (c) thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising atmosphere to produce a thermally treated powder comprising graphene sheets.
Claims18
A method of producing graphene sheets comprising the steps of,
- (a) forming a carbonaceous powder by electrochemical erosion of a graphite electrode in a molten salt comprising hydrogen ions,
- (b) recovering the resulting carbonaceous powder from the molten salt liquid, and
- (c) thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising atmosphere to produce a thermally treated powder comprising graphene sheets.
A method of producing graphene sheets comprising the steps of:
- (a) forming a carbonaceous powder by electrochemical erosion of a graphite electrode in an ionic liquid, the ionic liquid comprising hydrogen ions,
- (b) recovering the resulting carbonaceous powder from the ionic liquid, and
- (c) thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising or reducing atmosphere to produce a thermally treated powder comprising graphene sheets.
A method of producing graphene sheets comprising the steps of:
- (a) forming a carbonaceous powder by electrochemical intercalation of a metallic species and a hydrogen species into a graphite electrode, the graphite electrode being arranged in contact with an electrolyte, the electrolyte comprising the metallic species and the hydrogen species,
- (b) recovering the resulting carbonaceous powder from the electrolyte, and
- (c) thermally treating the carbonaceous powder by heating the carbonaceous powder in a non-oxidising or reducing atmosphere to produce a thermally treated powder comprising graphene sheets.
A method of producing graphene sheets comprising the steps of:
- (a) forming a carbonaceous powder by electrochemical erosion of a graphite electrode in a molten salt, in which electrochemical erosion of the graphite electrode is performed under an atmosphere comprising an inert gas and hydrogen, and
- (b) recovering the resulting carbonaceous powder, which comprises graphene sheets, from the molten salt.
Dependencies are inferred from the claim text.