Composite electrode material and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-11005091-B2
Application number	US-201715828459-A
Country	US
Kind code	B2
Filing date	Dec 1, 2017
Priority date	Aug 29, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

A novel composite electrode material and a method for manufacturing the same, a composite electrode containing said composite electrode material, and a Li-based battery comprising said composite electrode are disclosed. Herein, the composite electrode material of the present invention comprises: a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, C, and compounds thereof; and a carbon nanotube or a carbon fiber, wherein the carbon nanotube or the carbon fiber grows on a surface including a surface of the core.

First claim

What is claimed is:

1. A composite electrode material, comprising:
a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, C, and compounds thereof; and
a plurality of carbon nanotubes or a plurality of carbon fibers,
wherein the carbon nanotubes or the carbon fibers grow on a surface including a surface of the core and on the carbon nanotubes or the carbon fibers, and the carbon nanotubes or the carbon fibers form a three-dimensional porous mesh or sponge-like structure coating the core;
wherein a thickness of the core is in a range from 50 nm to 500 nm, and the core is a thin sheet of paper-like flake.

2. The composite electrode material as claimed in claim 1 , wherein the carbon nanotubes or the carbon fibers grow upright on the surface.

3. The composite electrode material as claimed in claim 1 , wherein an average length or an average width of the core is in a range from 500 nm to 1200 nm.

4. A method for manufacturing a composite electrode material, comprising steps of:
providing a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, C, and compounds thereof, a thickness of the core is in a range from 50 nm to 250 nm, and the core is a thin sheet of paper-like flake; and
growing a plurality of carbon nanotubes or a plurality of carbon fibers on a surface and on the carbon nanotubes or the carbon fibers through a chemical vapor deposition using a catalyst, wherein the surface includes a surface of the core, and the carbon nanotubes or the carbon fibers form a three-dimensional porous mesh or sponge-like structure coating the core.

5. The method as claimed in claim 4 , wherein the chemical vapor deposition is completed with evenly mixing with a rotating or stirring mechanism.

6. The method as claimed in claim 4 , wherein the chemical vapor deposition method is a thermal chemical vapor deposition.

7. The method as claimed in claim 4 , wherein the catalyst is a Fe-based or Ni-based catalyst.

8. The method as claimed in claim 4 , wherein the carbon nanotubes or the carbon fibers grow upright on the surface.

9. The method as claimed in claim 4 , wherein an average length or an average width of the core is in a range from 500 nm to 1200 nm.

10. A composite electrode, comprising:
a substrate on which an active material layer is disposed, wherein the active material layer comprises:
a composite electrode material, comprising:
a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, C, and compounds thereof, a thickness of the core is in a range from 50 nm to 250 nm, and the core is a thin sheet of paper-like flake; and
a plurality of carbon nanotubes or a carbon fibers,
wherein the carbon nanotubes or the carbon fibers grow on a surface including a surface of the core and on the carbon nanotubes or the carbon fibers, and the carbon nanotubes or the carbon fibers form a three-dimensional porous mesh or sponge-like structure coating the core; and
an adhesive agent.

11. The composite electrode as claimed in claim 10 , wherein the substrate is a conductive metal plate.

12. The composite electrode as claimed in claim 10 , wherein the composite electrode does not comprise a carbon black.

13. A Li-based battery, comprising:
a composite electrode, comprising:
a substrate on which an active material layer is disposed, wherein the active material layer comprises:
a composite electrode material, comprising:
a core, wherein a material of the core is at least one selected from the group consisting of Sn, Sb, Si, Ge, C, and compounds thereof, a thickness of the core is in a range from 50 nm to 1200 nm, and the core is a thin sheet of paper-like flake; and
a plurality of carbon nanotubes or a carbon fibers,
wherein the carbon nanotubes or the carbon fibers grow on a surface including a surface of the core and on the carbon nanotubes or the carbon fibers, and the carbon nanotubes or the carbon fibers form a three-dimensional porous mesh or sponge-like structure coating the core; and
an adhesive agent;
a lithium-containing counter electrode;
a separator disposed between the composite electrode and the lithium-containing counter electrode; and
an electrolytic solution disposed between the composite electrode and the lithium-containing counter electrode and also disposed on both sides of the separator.

Assignees

• Univ Nat Cheng Kung

Inventors

• Tzeng Yon-Hua
• Chen Wai-Leong
• Huang Wei-Chih

Classifications

• H01M4/0428

  Chemical vapour deposition · CPC title

• C23C16/4418

  Methods for making free-standing articles (C23C16/01 takes precedence) · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• C01B32/16 Primary

  Preparation · CPC title

• H01M4/366 Primary

  as layered products · CPC title