Method of producing electrode material for lithium-ion secondary battery and lithium-ion battery using such electrode material

Patent metadata

Field	Value
Publication number	US-12368168-B2
Application number	US-202418600573-A
Country	US
Kind code	B2
Filing date	Mar 8, 2024
Priority date	Oct 22, 2012
Publication date	Jul 22, 2025
Grant date	Jul 22, 2025

Abstract

A method for producing an electrode material for a lithium-ion secondary battery. The method includes the following steps: (a) mixing components of a basic ingredient or active substance of electrode material and a conductive carbon material to obtain a conductive carbon material-composited material; (b) mixing the conductive carbon material-composited material and a surface layer-forming material; an (c) burning the mixture obtained at step (b) to obtain the electrode material. Also, a lithium-ion secondary battery including an electrode which includes the material.

First claim

The invention claimed is:

1. An electrode material for a lithium-ion secondary battery, comprising a basic ingredient or active substance of electrode material and at least two types of carbon material, wherein a first type of carbon material is a conductive carbon material and a second type of carbon material is provided as a coating on a surface of the basic ingredient, the conductive carbon material is a combination of carbon black and two types of fibrous carbon material, a first type having a length of 1000 to 3000 nm and a second type having a length of 5000 to 10000 nm, a mass ratio of carbon black to fibrous carbon material is in the range of 1:3 to 8:1, and the electrode material is an anode material with a total content of carbon material higher than 1 mass %.

2. An electrode comprising the electrode material as defined in claim 1 .

3. A lithium-ion secondary battery, comprising an electrode comprising the electrode material as defined in claim 1 .

4. The electrode material according to claim 1 , wherein a thickness of the coating is 1 to 10 nm.

5. The electrode material according to claim 1 , wherein the anode material further comprises titanium.

6. An electrode material for a lithium-ion secondary battery, obtained by a method comprising:
(a) mixing components of a basic ingredient or active substance of electrode material and a conductive carbon material to obtain a solution, supplying the solution to a chamber, and carrying out a single hydrothermal reaction in the chamber for a period of less than 24 hours to obtain a conductive carbon material-composited material, wherein the conductive carbon material comprises carbon black and at least one type of fibrous carbon material;
(b) mixing the conductive carbon material-composited material and a surface layer-forming material to form a mixture, wherein the surface layer-forming material is adapted to form a surface layer on the conductive carbon material-composited material, and wherein the surface layer-forming material is an organic substance containing a sugar selected from the group consisting of polysaccharide or lactose; and
(c) burning the mixture obtained at step (b) to obtain the electrode material, wherein the surface layer-forming material forms a surface layer on the conductive carbon material-composited material and the electrode material is an anode material with a total content of carbon material higher than 1 mass %.

7. The electrode material according to claim 6 , wherein the single hydrothermal reaction at step (a) is performed at a temperature of 100 to 350° C.

8. The electrode material according to claim 6 , wherein a solid-phase reaction occurs during step (a).

9. The electrode material according to claim 6 , wherein step (b) comprises immersing the conductive carbon material-composited material into a water solution including the surface layer-forming material, and removing the water by drying.

10. The electrode material according to claim 6 , wherein step (c) is performed at a temperature that is higher than a temperature at which the surface layer-forming material forms activated covalent bonds with carbon atoms of the conductive carbon material, and/or a temperature that is lower than a temperature at which the conductive carbon material-composited material decomposes.

11. The electrode material according to claim 6 , wherein step (c) is performed under inert atmosphere, and/or at a temperature of 500 to 800° C., and/or for a period of 3 to 12 hours.

Assignees

• Hydro Quebec

Inventors

• Gariepy Vincent
• Guerfi Abdelbast
• Hanai Kazuma
• Hovington Pierre
• Saito Shinji
• Sawai Takehiko
• Urao Kazunori
• Zaghib Karim

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• Y02T10/70

  Energy storage systems for electromobility, e.g. batteries · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• C01B25/45

  containing plural metal, or metal and ammonium · CPC title