Method for manufacturing lithium ion battery

Patent metadata

Field	Value
Publication number	US-10873077-B2
Application number	US-201916369186-A
Country	US
Kind code	B2
Filing date	Mar 29, 2019
Priority date	Mar 23, 2016
Publication date	Dec 22, 2020
Grant date	Dec 22, 2020

Abstract

A lithium ion secondary battery is disclosed that can inhibit generation of gas due to decomposition of a non-aqueous electrolyte solution. The lithium ion battery includes a cathode, a non-aqueous electrolyte solution and an anode, wherein the cathode includes a conductive material, a layered niobium-containing oxide that coats a surface of the conductive material, and a lithium-containing oxide active material having an upper-limit potential to a redox potential of metal lithium of no less than 4.5 V (vs. Li/Li + ).

First claim

What is claimed is:

1. A method for manufacturing a lithium ion battery comprising:
coating only a surface of a conductive material with a layered niobium-containing oxide to form a complex;
mixing the complex and a lithium-containing oxide active material having an upper-limit potential to a redox potential of metal lithium of no less than 4.5 V (vs. Li/Li + ) to obtain a cathode mixture;
manufacturing a cathode from the cathode mixture; and
manufacturing a power generation element from the cathode, a non-aqueous electrolyte solution and an anode.

2. The method according to claim 1 , wherein the coating of the layered niobium-containing oxide is by an atomic layer deposition (ALD).

3. The method according to claim 1 , wherein said layered niobium-containing oxide has a thickness of in the range of no less than 0.4 nm.

4. The method according to claim 1 , wherein said layered niobium-containing oxide has a thickness in the range of 0.4 nm to 5 nm.

5. The method according to claim 1 , wherein the conductive material consists of a carbon material.

6. The method according to claim 1 , wherein said niobium-containing oxide includes niobium oxide and lithium niobate.

7. The method accordingly to claim 1 , wherein said lithium-containing oxide includes a lithium nickel manganese composite oxide.

8. The method according to claim 1 , wherein said conductive material is in a particulate form having a particle diameter of 5 nm to 100 nm and an aspect ratio of less than 2.

9. The method according to claim 1 , wherein said conductive material is in a fibrous form having a fiber diameter of 10 nm to 1 μm and has an aspect ratio of no less than 20.

10. The method according to claim 1 , wherein in the coating, the surface of the conductive material is continuously coated with the layered niobium-containing oxide along the surface shape of the conductive material to form the complex.

Assignees

• Toyota Motor Co Ltd

Inventors

• Shindo Yohei
• Takebayashi Yoshitomo
• Ando Sho
• Shimo Yusuke

Classifications

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M10/0525

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

• H01B1/08 Primary

  oxides · CPC title

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title