High performance electrodes, materials, and precursors thereof

Patent metadata

Field	Value
Publication number	US-12255333-B2
Application number	US-202217711709-A
Country	US
Kind code	B2
Filing date	Apr 1, 2022
Priority date	Nov 12, 2015
Publication date	Mar 18, 2025
Grant date	Mar 18, 2025

Abstract

Provided herein are high performance electrodes, electrode materials comprising a plurality of active electrode material-containing particles secured within one or more graphenic web, and precursors thereof. Also provided herein are processes of generating the same by an electrospray process.

First claim

What is claimed is:

1. A process for manufacturing an electrode or electrode material, the process comprising:
a. producing a plume or aerosol comprising a plurality of droplets from a fluid stock by:

providing the fluid stock to an inlet of a conduit of an electrospray nozzle wherein the fluid stock comprising a plurality of inclusions and a liquid medium, the inclusions comprising a graphenic material and a plurality of particles wherein the plurality of graphenic material having an average length and/or width that is at least 2 times greater than an average of a smallest diameter, length and/or width of the particles; and
b. collecting a film comprising a first composition wherein the first composition comprising one or more particles wrapped and secured within one or more graphenic web of the plurality of graphenic material.

2. The process of claim 1 , wherein the graphenic material is selected from graphene, graphene oxide, reduced graphene oxide, or graphene analog.

3. The process of claim 1 , wherein the particles comprise microparticles and/or nanoparticles.

4. The process of claim 1 , wherein the particles comprise active electrode material.

5. The process of claim 4 , wherein the active electrode material comprises a high energy capacity material.

6. The process of claim 5 , wherein the high energy capacity material has a capacity of greater than 400 mAh/g.

7. The process of claim 4 , wherein the active electrode material comprises a material having a volume expansion upon lithiation.

8. The process of claim 7 , wherein the active electrode material comprises a material having a volume expansion upon lithiation of greater than 150%.

9. The process of claim 4 , wherein the active electrode material comprises Si, Ge, Sn, Co, Al, Cu, Fe, any oxidation state thereof, any carbide thereof, any alloy thereof, or any combination thereof.

10. The process of claim 1 , further comprising thermally treating the collected first composition to form a second composition.

11. The process of claim 10 , wherein the first composition is treated to a temperature of at least 100° C.

12. The process of claim 10 , wherein the first composition is treated to a temperature in a range of about 100° C. to about 400° C.

13. The process of claim 1 , wherein the one or more graphenic web in the first composition shrink around one or more of the plurality of particles to form a second composition such that the one or more graphenic web form one or more graphene pockets or envelopes to enclose the one or more particles within the one or more graphene pockets or envelopes.

14. The process of claim 1 , wherein the average size of the graphenic material is about 2 to about 20 times greater than the average size of the smallest dimension of the particles.

15. The process of claim 1 , wherein the graphenic material has one or more carbon atoms substituted with one or more additional atoms.

16. The process of claim 1 , wherein the one or more additional atoms are selected from oxygen, halide, hydrogen, or any combination thereof.

17. The process of claim 1 , wherein the particles comprise nanofibers and/or carbon matrix.

18. The process of claim 1 , wherein the plume or aerosol is deposited on a conductive substrate.

19. The process of claim 1 , wherein the film comprises a continuous graphenic web defining a plurality of graphenic pockets and wherein each graphenic pocket comprises one or more particles enclosed or wrapped therein.

Assignees

• Univ Cornell

Inventors

• Joo Yong Lak
• Fei Ling

Classifications

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title

• B05B5/03

  characterised by the use of gas {, e.g. electrostatically assisted pneumatic spraying (B05B5/04, B05B5/043, B05B5/047 take precedence)} · CPC title

• H01M4/0419

  involving spraying · CPC title