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-12068484-B2
Application number	US-202218059035-A
Country	US
Kind code	B2
Filing date	Nov 28, 2022
Priority date	Oct 22, 2012
Publication date	Aug 20, 2024
Grant date	Aug 20, 2024

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, and wherein 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.

2. The electrode material according to claim 1 , wherein the basic ingredient or active substance of the electrode material is an olivine-type lithium-containing transition metal phosphate compound.

3. The electrode material according to claim 2 , wherein the basic ingredient or active substance of the electrode material is LiFePO 4 , LiCoPO 4 , or LiMnPO 4 .

4. The electrode material according to claim 1 , wherein the active substance of electrode material comprises lithium (Li), phosphorus (P), and a transition metal.

5. The electrode material according to claim 1 , wherein the active substance is an olivine-type lithium-containing transition metal phosphate compound selected from the group consisting of: LiFePO 4 , LiCoPO 4 , or LiMnPO 4 .

6. The electrode material according to claim 1 , wherein the first type of fibrous carbon material has diameter of about 5 to 15 nm; and the second type of fibrous carbon material has a diameter of about 70 to 150 nm.

7. The electrode material according to claim 1 , wherein the coating comprises at least one carbon phase selected from the group consisting of a graphene phase and an amorphous phase.

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

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

10. The electrode material according to claim 1 , wherein the electrode material is an anode material, and a thickness of the coating is about 1 to 10 nm.

11. The electrode material according to claim 1 , wherein the electrode material is an anode material, and the anode material further comprises titanium.

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