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-2023094444-A1
Application number	US-202218059035-A
Country	US
Kind code	A1
Filing date	Nov 28, 2022
Priority date	Oct 22, 2012
Publication date	Mar 30, 2023
Grant date	—

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

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 at least one type of fibrous carbon black.

2 . The electrode material according to claim 1 , wherein the types of fibrous carbon material are of different sizes; or wherein the fibrous material is of two types, a first type having a length of 1000 to 3000 nm and a second type having a length of 5000 to 10000 nm.

3 . 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 such as LiFePO 4 , LiCoPO 4 , or LiMnPO 4 .

4 . The electrode material according to claim 1 , wherein the components of the active substance of electrode material are a lithium-containing compound; a phosphorus-containing compound; and a transition metal-containing compound.

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 conductive carbon material comprises at least two types of fibrous carbon material, wherein the types of fibrous carbon material are of different sizes.

7 . The electrode material according to claim 1 , wherein the conductive carbon material comprises a mixture of two types of fibrous material, a first type having a length of about 1000 to 3000 nm and a diameter of about 5 to 15 nm; and a second type having a length of about 5000 to 10000 nm and a diameter of about 70 to 150 nm.

8 . The electrode material according to claim 1 , wherein the surface layer comprises at least one carbon phase selected from the group consisting of graphene phase and amorphous phase.

9 . The electrode material according to claim 1 , wherein a mass ratio of carbon black to fibrous carbon material is in the range of about 1:3 to about 8:1.

10 . The electrode material according to claim 1 , wherein the surface layer-forming material is an organic substance which is a sugar selected from the group consisting of polysaccharide or lactose.

11 . The electrode material according to claim 1 , wherein the electrode material is a cathode material, and a total content of carbon material in the cathode material is higher than about 2 mass%.

12 . The electrode material according to claim 1 , wherein the electrode material is an anode material, and:
a total content of carbon material in the anode material is higher than about 1 mass%; and/or a thickness of the surface layer is about 1 to 10 nm; and/or the anode material further comprises titanium.

13 . 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 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 to obtain a conductive carbon material-composited 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 (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.

14 . The electrode material according to claim 12 , wherein the hydrothermal reaction is performed at a temperature of about 100 to 350° C.

15 . The electrode material according to claim 12 , wherein a solid-phase reaction occurs during step (a).

16 . The electrode material according to claim 12 , 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.

17 . The electrode material according to claim 12 , 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.

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

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

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

Assignees

• Hydro Quebec

Inventors

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

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/485 Primary

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/625 Primary

  Carbon or graphite · CPC title

• Y02P70/50

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

• H01M4/5825 Primary

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title