IP Library › Granted Patent US 12,488,907
Granted Patent B2
US 12,488,907 · App. 17/739,949 · Granted Dec 2, 2025

Large scale production of thinned graphite, graphene, and graphite-graphene composites

Inventors: Marie Bozalina (Montreal, CA); Philippe Perret (Longueuil, CA); Soroush Nazarpour (Montreal, CA)
Assignee: NanoXplore Inc.
H01B1/04B02C17/20B02C17/22B82Y30/00C01B32/184C01B32/20C01B32/21C01B32/225C09D1/00C09D5/084C09D5/24C09K5/14C10M103/02C30B29/02C30B29/64C30B33/00B82Y40/00C01B2204/04C10M2201/0413
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Quick Facts
Patent No.
US 12,488,907
App. No.
17/739,949
Granted
Dec 2, 2025
Kind
B2
Abstract

Embodiments described herein relate generally to large scale synthesis of thinned graphite and in particular, few layers of graphene sheets and graphene-graphite composites. In some embodiments, a method for producing thinned crystalline graphite from precursor crystalline graphite using wet ball milling processes is disclosed herein. The method includes transferring crystalline graphite into a ball milling vessel that includes a grinding media. A first and a second solvent are transferred into the ball milling vessel and the ball milling vessel is rotated to cause the shearing of layers of the crystalline graphite to produce thinned crystalline graphite.

Claims (19)

1 . A composition, comprising:

a plurality of few layer graphene powder particles, the plurality of few layer graphene powder particles having a thickness of 1 graphene layer to about 10 graphene layers and an aspect ratio of at least about 50, the composition having a G-band intensity to D-band intensity ratio between about 14 and about 28,

wherein the plurality of few layer graphene powder particles have a purity of greater than about 95% by weight, and the plurality of few layer graphene powder particles is not formed into, and does not form part of, a graphene pattern having a predetermined shape.

2 . The composition of claim 1 , wherein the few layer graphene powder particles have lateral dimension of about 500 nm to about 5 μm.

3 . The composition of claim 2 , wherein the plurality of few layer graphene powder particles have an aspect ratio of at least about 100.

4 . The composition of claim 3 , wherein the plurality of few layer graphene powder particles have an aspect ratio of at least about 250.

5 . The composition of claim 1 , wherein the plurality of few layer graphene layers are edge functionalized.

6 . The composition of claim 5 , wherein the plurality of few layer graphene layers are edge functionalized with hydroxyl groups.

7 . The composition of claim 1 , wherein the plurality of few layer graphene powder particles have a lateral dimension in a range of about 500 nm to about 5 μm.

8 . The composition of claim 1 , wherein the plurality of few layer graphene powder particles are formed from combining a crystalline graphite with a solution, the solution including at least one of a metal hydroxide salt, an oxidizer, and a surfactant.

9 . A composition, comprising:

a plurality of few layer graphene powder particles, the plurality of few layer graphene powder particles having an average lateral dimension of at least about 500 nm and an aspect ratio of at least about 50, the composition having a G-band intensity to D-band intensity ratio between about 14 and about 28,

wherein the plurality of few layer graphene powder particles have a purity of greater than about 95% by weight, and wherein the plurality of few layer graphene powder particles is produced by a method comprising a wet ball milling process such that the plurality of few layer graphene powder particles is not formed into, and does not form part of, a graphene pattern having a predetermined shape.

10 . The composition of claim 9 , wherein the plurality of few layer graphene powder particles have a thickness of less than about 5 nm.

11 . The composition of claim 10 , wherein the plurality of few layer graphene powder particles have an aspect ratio of at least about 100.

12 . The composition of claim 11 , wherein the plurality of few layer graphene powder particles have an aspect ratio of at least about 250.

13 . The composition of claim 9 , wherein the plurality of few layer graphene powder particles have a thermal stability up to about 690° C.

14 . The composition of claim 9 , wherein the plurality of few layer graphene layers are edge functionalized with hydroxyl groups.

15 . The composition of claim 9 , wherein the plurality of few layer graphene powder particles are formed from combining a crystalline graphite with a solution, the solution including at least one of a metal hydroxide salt, an oxidizer, and a surfactant.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 10, 2022
From: BOZALINA, MARIE; PERRETT, PHILIPPE; NAZARPOUR, SOROUSH
To: GROUP NANOXPLORE INC.
Reel/Frame 059877/0446 →
CHANGE OF NAME Recorded May 10, 2022
From: GROUP NANOXPLORE INC.
To: NANOXPLORE INC.
Reel/Frame 059877/0466 →
Continuity (7)
Continuation 16409153 · May 10, 2019
Continuation 15270855 · Sep 20, 2016
Continuation 14978566 · Dec 22, 2015
Continuation PCTCA2015050525 · Jun 8, 2015
Provisional Application 62035963 · Aug 11, 2014
Provisional Application 62008729 · Jun 6, 2014
Related Publication 20230005638A1 · Jan 5, 2023
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