Graphene material and method of preparing the same
US9630852B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Sep 8, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B32/184
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of preparing a graphene material. The method includes: (1) preparing a liquid polyacrylonitrile (LPAN) solution, stirring the LPAN solution to yield a cyclized polyacrylonitrile solution; (2) stirring the cyclized LPAN solution at between 200 and 300° C. to yield a thermally-oxidized polyacrylonitrile; (3) grinding and sieving the thermally-oxidized polyacrylonitrile, and drying a resulting product at room temperature, to yield a thermally-oxidized precursor; (4) calcining the thermally-oxidized precursor in the presence of an inert gas flow of between 10 and 500 mL/min for between 1 and 24 hrs at the temperature of between 400 and 1000° C., to yield a carbonized precursor; and (5) calcining the carbonized precursor in the presence of an inert gas flow of between 10 and 500 mL/min for between 1 and 10 hrs at the temperature of between 1000 and 3000° C., to yield a graphene material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.