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-2024274828-A1
Application number	US-202418600573-A
Country	US
Kind code	A1
Filing date	Mar 8, 2024
Priority date	Oct 22, 2012
Publication date	Aug 15, 2024
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 - 8 . (canceled)

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

10 . (canceled)

11 . The electrode material according to claim 9 , 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 9 , 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 %.

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 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.

14 . The electrode material according to claim 13 , wherein the single hydrothermal reaction at step (a) is performed at a temperature of about 100 to 350° C.

15 . The electrode material according to claim 13 , wherein a solid-phase reaction occurs during step (a).

16 . The electrode material according to claim 13 , 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 13 , 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 13 , 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 9 .

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

21 . The electrode material according to claim 9 , wherein the basic ingredient or active substance of the electrode material is an olivine-type lithium-containing transition metal phosphate compound.

22 . The electrode material according to claim 9 , wherein the active substance of electrode material comprises lithium (Li), phosphorus (P), and a transition metal.

23 . The electrode material according to claim 9 , wherein the basic ingredient or active substance of the electrode material is LiFePO 4 , LiCoPO 4 , or LiMnPO 4 .

24 . The electrode material according to claim 9 , wherein the electrode material is an anode material, and a thickness of the coating is about 1 to 10 nm.

25 . The electrode material according to claim 9 , 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