Stabilized lithium powder, and negative electrode and lithium ion secondary battery using the same

Patent metadata

Field	Value
Publication number	US-10263250-B2
Application number	US-201514874875-A
Country	US
Kind code	B2
Filing date	Oct 5, 2015
Priority date	Oct 3, 2014
Publication date	Apr 16, 2019
Grant date	Apr 16, 2019

Abstract

Stabilized lithium powder according to an embodiment of this disclosure includes lithium particles. Each lithium particle includes an inorganic compound on a surface thereof, the inorganic compound contains lithium hydroxide, and the lithium hydroxide is contained by 2.0 wt% or less relative to the entire stabilized lithium powder.

First claim

What is claimed is:

1. Stabilized lithium powder, comprising
lithium particles, and
a stabilized layer formed on a surface of each of the lithium particles, the stabilized layer comprising:
an inorganic composition containing lithium hydroxide in an amount of 2.0 wt % or less relative to a total amount of the stabilized lithium powder, and
Fe in an amount in a range of from 1.0×10 −3 mass % to 10.0×10 −3 mass % relative to the total amount of the stabilized lithium powder.

2. The stabilized lithium powder according to claim 1 , wherein the inorganic composition further contains lithium oxide.

3. The stabilized lithium powder according to claim 2 , wherein the lithium oxide is contained in an amount of 1 wt % or more and 10 wt % or less relative to the total amount of the stabilized lithium powder.

4. A negative electrode, the negative electrode being doped with lithium from the stabilized lithium powder according to claim 1 .

5. A negative electrode for a lithium ion secondary battery, the negative electrode being doped with lithium from the stabilized lithium powder according to claim 2 .

6. A negative electrode for a lithium ion secondary battery, the negative electrode being doped with lithium from the stabilized lithium powder according to claim 3 .

7. A lithium ion secondary battery comprising:
the negative electrode according to claim 4 ;
a positive electrode; and
an electrolyte.

8. A lithium ion secondary battery comprising:
the negative electrode according to claim 5 ;
a positive electrode; and
an electrolyte.

9. A lithium ion secondary battery comprising:
the negative electrode according to claim 6 ;
a positive electrode; and
an electrolyte.

10. The stabilized lithium powder according to claim 1 , wherein Fe is present in the stabilized lithium powder as a single metal or as a compound containing oxygen.

11. The stabilized lithium powder according to claim 1 , wherein Fe is present in an amount in a range of from 1.0×10 −3 mass % to 9.7×10 −3 mass % relative to the total amount of the stabilized lithium powder.

Assignees

• Tdk Corp

Inventors

• Tsuchiya Masahiro
• Hasegawa Tomohiko
• Kai Kazuya
• Sano Atsushi

Classifications

• H01M4/483

  for non-aqueous cells (H01M4/485 takes precedence) · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic