Positive electrode active material for secondary battery, secondary battery, battery management unit, and electronic device

Patent metadata

Field	Value
Publication number	US-12087935-B2
Application number	US-202318214109-A
Country	US
Kind code	B2
Filing date	Jun 26, 2023
Priority date	Mar 3, 2016
Publication date	Sep 10, 2024
Grant date	Sep 10, 2024

Abstract

A lithium-ion secondary battery including a lithium-containing complex phosphate as a positive electrode active material is provided. Furthermore, a positive electrode active material with high diffusion rate of lithium ions is provided to provide a lithium-ion secondary battery with high output. A positive electrode active material of a lithium-ion secondary battery includes a first plate-like component and a second plate-like component, a third prismatic component between the first component and the second component, and a space between the first component and the second component.

First claim

What is claimed is:

1. A positive electrode active material, comprising:
a first component;
a second component; and
a third component between the first component and the second component,
wherein each of the first component and the second component contacts the third component,
wherein each of the first component and the second component includes a portion which extends beyond an edge of the third component to form a space between the first component and the second component,
wherein each of the first component, the second component, and the third component comprises lithium, a metal, phosphorous and oxygen,
wherein a first surface of the third component is in contact with a first surface of the first component, and
wherein a second surface of the third component is in contact with a first surface of the second component.

2. The positive electrode active material according to claim 1 ,
wherein each of the first component, the second component, and the third component comprises lithium iron phosphate.

3. The positive electrode active material according to claim 1 ,
wherein the portion of the first component which extends beyond the edge of the third component is substantially parallel to the portion of the second component which extends beyond the edge of the third component.

4. The positive electrode active material according to claim 1 ,
wherein the third component is prismatic shape.

5. A positive electrode active material, comprising:
a first component having a plate-like shape;
a second component having a plate-like shape; and
a third component between the first component and the second component,
wherein each of the first component and the second component contacts the third component,
wherein each of the first component and the second component includes a portion which extends beyond an edge of the third component to form a space between the first component and the second component,
wherein each of the first component, the second component, and the third component comprises lithium, a metal, phosphorous and oxygen,
wherein a first surface of the first component faces a first surface of the second component, and
wherein a second surface of the first component opposite of the first surface of the first component and a second surface of the second component opposite of the first surface of the second component face opposite directions.

6. The positive electrode active material according to claim 5 ,
wherein each of the first component, the second component, and the third component comprises lithium iron phosphate.

7. The positive electrode active material according to claim 5 ,
wherein the portion of the first component which extends beyond the edge of the third component is substantially parallel to the portion of the second component which extends beyond the edge of the third component.

8. The positive electrode active material according to claim 5 ,
wherein the third component is prismatic shape.

9. A lithium-ion secondary battery comprising:
a positive electrode active material; and
an electrolytic solution,
wherein the positive electrode active material comprises:
a first component;
a second component; and
a third component between the first component and the second component,
wherein each of the first component and the second component contacts the third component,
wherein each of the first component and the second component includes a first portion which extends beyond a first edge of the third component and a second portion which extends beyond a second edge of the third component opposite of the first edge,
wherein a space is formed between the first component and the second component,
wherein each of the first component, the second component, and the third component comprises lithium, a metal, phosphorous and oxygen, and
wherein the electrolytic solution is in contact with the positive electrode active material at least in the space between the first component and the second component.

10. The lithium-ion secondary battery according to claim 9 ,
wherein each of the first component, the second component, and the third component comprises lithium iron phosphate.

11. The lithium-ion secondary battery according to claim 9 ,
wherein the first portion of the first component which extends beyond the first edge of the third component is substantially parallel to the first portion of the second component which extends beyond the first edge of the third component.

12. The lithium-ion secondary battery according to claim 9 ,
wherein the third component is prismatic shape.

13. The lithium-ion secondary battery according to claim 9 ,
wherein the first component and the second component are plate-like shape.

14. The positive electrode active material according to claim 5 ,
wherein an area of overlap between the first surface of the first component and the first surface of the second component is larger than an area of overlap between the first surface of the first component and a first surface of the third component.

15. The lithium-ion secondary battery according to claim 9 ,
wherein the electrolytic solution is in contact with a first surface of the third component, a second surface of the third component, and a third surface of the third component.

16. The lithium-ion secondary battery according to claim 9 ,
wherein the first component extends in a first direction,
wherein the second component extends in the first direction, and
wherein the third component extends in a second direction different from the first direction.

17. The positive electrode active material according to claim 1 ,
wherein a second surface of the first component opposite of the first surface of the first component and a second surface of the second component opposite of the first surface of the second component are in contact with an electrolytic solution.

18. The positive electrode active material according to claim 1 ,
wherein no space is formed between the first component and the third component and between the second component and the third component.

19. The positive electrode active material according to claim 5 ,
wherein no space is formed between the first component and the third component and between the second component and the third component.

20. The positive electrode active material according to claim 9 ,
wherein, in a schematic view, the third component does neither overlap with nor extend beyond an edge of the first component and an edge of the second component.

Assignees

• Semiconductor Energy Lab

Inventors

• Oguni Teppei
• Miwa Takuya

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2010/4278

  Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller · CPC title

• H01M2004/028

  Positive electrodes · 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