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US 2021/0230000 A1Published application
A method for the manufacture of pristine graphene from kish graphite
AssigneeArcelorMittal
InventorsThi Tan VU, Oscar PEREZ VIDAL, Roberto SUAREZ SANCHES
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Abstract
A method for the manufacture of pristine graphite from Kish graphite including three different steps A, B and C; the pristine obtained with among others a high amount of carbon atoms, i.e. a pristine graphene having a high purity; and the use of this pristine graphene.
Claims17
1-16. (canceled)
A method for the manufacture of pristine graphene from kish graphite comprising:
- A. providing kish graphite,
- B. optionally pre-treating the kish graphite,
- C. synthesizing pristine graphene from the kish-graphite including the following successive sub-steps:
- i. intercalating the kish graphite with a nitrate salt and an acid to obtain intercalated kish graphite,
- ii. thermal expanding the intercalated kish graphite to obtain expanded kish graphite at a temperature above 600° C.,
- iii. exfoliating the expanded kish graphite by ultra-sonication to obtain exfoliated kish graphite,
- iv. separating unexfoliated kish graphite from the exfoliated kish graphite to obtain pristine graphene.
4 more elements
Dependencies are inferred from the claim text.