Electrode, secondary battery, battery pack, vehicle, and stationary power supply

Patent metadata

Field	Value
Publication number	US-11462742-B2
Application number	US-202016804355-A
Country	US
Kind code	B2
Filing date	Feb 28, 2020
Priority date	Sep 19, 2018
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

According to one embodiment, an electrode is provided. The electrode includes a current collector, an electrode mixture layer, and a self-assembled film. The first self-assembled film covers at least a part of a surface of the current collector. The first self-assembled film contains organic molecules. The electrode mixture layer disposed on at least a part of the first self-assembled film.

First claim

What is claimed is:

1. An electrode comprising:
a current collector;
a first self-assembled film containing organic molecules and covering at least a part of a surface of the current collector; and
an electrode mixture layer disposed on at least a part of a surface of the first self-assembled film,
wherein the organic molecules include at least one of a first structure and a second structure,
wherein the first structure is represented by
R—XO n ,

R being a first carbon chain structure or a second carbon chain structure having a terminal functional group, X being P, N, and/or C, and n being 0, 1, 2, or 3, and
wherein the second structure represented by formula (1)
A-R 1 -B  (1)

A being a carboxyl group, a fluoroalkyl group, a phosphonic acid group, or an amino group, the R 1 being represented by a being 3 or larger and 17 or smaller, b being 1 or larger and 35 or smaller, and B being a carboxyl group or a phosphonic acid group.

2. The electrode according to claim 1 , wherein the organic molecules include the first structure.

3. The electrode according to claim 1 , wherein the first carbon chain structure or the second carbon chain structure contains fluorine.

4. The electrode according to claim 1 , wherein the organic molecules include the second structure.

5. The electrode according to claim 1 , wherein a thickness of the first self-assembled film according to an ellipsometer is 0.4 nm or greater and 5 nm or smaller.

6. The electrode according to claim 1 , further comprising a second self-assembled film that covers at least a part of a surface of the electrode mixture layer and faces the first self-assembled film via the electrode mixture layer.

7. The electrode according to claim 6 , wherein a thickness of the second self-assembled film according to the ellipsometer is 0.4 nm or greater and 5 nm or smaller.

8. The electrode according to claim 1 , wherein the organic molecules contain at least one selected from the group consisting of 1H, 1H, 2H, 2H-perfluoro-n-hexylphosphonic acid, 10-carboxydecylphosphonic acid, stearic acid, and octadecylphosphonic acid.

9. The electrode according to claim 1 , wherein the organic molecules include the first and the second structure.

10. The electrode according to claim 1 , wherein the organic molecules include the second structure, and A is a carboxyl group.

11. The electrode according to claim 1 , wherein the organic molecules include the second structure, and A is a fluoroalkyl group.

12. The electrode according to claim 1 , wherein the organic molecules include the second structure, and A is a a phosphonic acid group.

13. A secondary battery comprising:
a positive electrode;
a negative electrode; and
an aqueous electrolyte,
wherein at least one of the positive electrode and the negative electrode includes the electrode according to claim 1 .

14. The secondary battery according to claim 13 , wherein the negative electrode comprises a negative electrode active material including at least one compound selected from the group consisting of titanium oxide, lithium-titanium oxide having a spinel structure, niobium-titanium composite oxide, and orthorhombic Na-containing niobium-titanium composite oxide.

15. A battery pack comprising the secondary battery according to claim 13 .

16. The battery pack according to claim 15 , further comprising an external power distribution terminal and a protective circuit.

17. The battery pack according to claim 15 , which includes plural of the secondary battery and the plural of the secondary battery are electrically connected in series, in parallel, or in combination of series and parallel.

18. A vehicle comprising the battery pack according to claim 15 .

19. The vehicle according to claim 18 , further comprising a mechanism which converts kinetic energy of the vehicle into regenerative energy.

20. A stationary power supply comprising the battery pack according to claim 15 .

Assignees

• Toshiba Kk

Inventors

• Yamashita Yasunobu
• Matsuno Shinsuke
• Takami Norio
• Inagaki Hiroki

Classifications

• H01M50/593

  Spacers; Insulating plates · CPC title

• H01M50/588

  outside the batteries, e.g. incorrect connections of terminals or busbars · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · 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

• H01M10/4207

  for several batteries or cells simultaneously or sequentially · CPC title