Granted Patent B1

US 12,351,462 · App. 18/927,286 · Granted Jul 8, 2025

Inventors: Palash Gangopadhyay (Chapel Hill, NC); Andrea Cabrero Vilatela (Mexico City, MX); Kurumi Austin (Tempe, AZ)

Assignee: Urbix, Inc.

C01B32/21B05C19/00H01M4/366H01M4/587C01P2004/03C01P2004/80C01P2006/11C01P2006/40

Abstract

Claims (18)

1. A method of shaping and coating graphite comprising:

providing graphite particles in a treatment chamber of a shaping and coating machine, wherein at least one portion of the graphite particles comprises purified natural graphite particles, wherein the shaping and coating machine comprises a motor, a controller, and a recirculation duct comprising a duct inlet formed in the treatment chamber and a duct outlet formed in the treatment chamber, wherein the recirculation duct is configured to re-direct a flow of the graphite particles between the duct inlet and the duct outlet as the treatment chamber rotates;

rotating the graphite particles at a first speed for a first length of time in the treatment chamber to form Spherical Purified Graphite (SPG) particles;

providing a first powder coating material in the treatment chamber of the shaping and coating machine; and

rotating the first powder coating material and the SPG particles at a second speed and for a second length of time in the treatment chamber to form Coated Spherical Purified Graphite (CSPG) particles, wherein the controller is configured to cause the motor to rotate the graphite particles and the first powder coating material.

2. The method of claim 1 , wherein the first speed is greater than 50 meters/second.

3. The method of claim 2 , wherein the second speed is the same as the first speed.

4. The method of claim 2 , wherein the second speed is different than the first speed.

5. The method of claim 1 , wherein the first length of time is between 5 and 30 minutes.

6. The method of claim 1 , wherein the second length of time is between 1 and 5 minutes.

7. The method of claim 1 , wherein a second portion of the graphite particles comprises synthetic graphite particles.

8. The method of claim 1 further comprising providing non-graphite particles prior to providing the first powder coating material for enhancing performance of the CSPG.

9. The method of claim 1 , wherein the first powder coating material comprises pitch.

10. The method of claim 9 , further comprising:

providing a second powder coating material in the chamber of the shaping and coating machine; and

rotating the second powder coating material and CSPG particles to provide a second coating over the CSPG particles.

11. The method of claim 10 , wherein the second coating material comprises carbon nanotubes.

12. The method of claim 10 , wherein the second coating material comprises non-graphite particles configured to enhance performance of the CSPG.

Assignments (2)

References Cited (163)