Secondary battery

Patent metadata

Field	Value
Publication number	US-9843073-B2
Application number	US-201514854349-A
Country	US
Kind code	B2
Filing date	Sep 15, 2015
Priority date	Sep 19, 2014
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A gel electrolyte and a separator are provided between the positive electrode current collector and the negative electrode current collector. The plurality of positive electrode current collectors and the plurality of negative electrode current collectors are stacked such that surfaces of negative electrodes with which active material layers are not coated or surfaces of positive electrodes with which active material layers are not coated are in contact with each other.

First claim

The invention claimed is:

1. A secondary battery comprising:
a first positive electrode current collector;
a first positive electrode active material layer over and in contact with a top surface of the first positive electrode current collector;
a first negative electrode active material over the first positive electrode active material layer;
a first negative electrode current collector over and in contact with a top surface of the first negative electrode active material layer;
a second negative electrode current collector over and in contact with a whole top surface of the first negative electrode current collector;
a second positive electrode active material layer over the second negative electrode active material layer;
a second positive electrode current collector over and in contact with a top surface of the second positive electrode active material layer; and
a gel electrolyte and a separator that are between the first positive electrode current collector and the first negative electrode current collector,
wherein the gel electrolyte includes a polymer, an electrolyte, and a solvent,
wherein in the first positive electrode current collector, the first negative electrode current collector, the second positive electrode current collector, the second negative electrode current collector, the gel electrolyte, and the separator are covered with an exterior body, and
wherein the first positive electrode current collector, the first negative electrode current collector, the second positive electrode current collector, the second negative electrode current collector, the separator, and the exterior body are flexible.

2. The secondary battery according to claim 1 ,
wherein a static friction coefficient between the first negative electrode current collector and the second negative electrode current collector is less than or equal to 0.80.

3. The secondary battery according to claim 1 ,
wherein the polymer is poly(dimethylaminoethyl methacrylate).

4. The secondary battery according to claim 2 ,
wherein the static friction coefficient is greater than or equal to 0.01 and less than or equal to 0.80.

5. The secondary battery according to claim 2 ,
wherein the static friction coefficient is greater than or equal to 0.20 and less than or equal to 0.65.

6. The secondary battery according to claim 2 ,
wherein the static friction coefficient is greater than or equal to 0.57 and less than or equal to 0.59.

7. A battery comprising:
a first positive electrode current collector;
a first positive electrode active material layer over and in contact with a top surface of the first positive electrode current collector;
a first negative electrode active material over the first positive electrode active material layer;
a first negative electrode current collector over and in contact with a top surface of the first negative electrode active material layer;
a second negative electrode current collector over and in contact with a whole top surface of the first negative electrode current collector;
a gel electrolyte and a separator that are between the first positive electrode current collector and the first negative electrode current collector,
wherein the second negative electrode current collector is able to slide on the top surface of the first negative electrode current collector.

8. The battery according to claim 7 ,
wherein a static friction coefficient between the first negative electrode current collector and the second negative electrode current collector is less than or equal to 0.80.

9. The battery according to claim 7 ,
wherein the gel electrolyte includes poly(dimethylaminoethyl methacrylate).

10. The battery according to claim 8 ,
wherein the static friction coefficient is greater than or equal to 0.01 and less than or equal to 0.80.

11. The battery according to claim 8 ,
wherein the static friction coefficient is greater than or equal to 0.20 and less than or equal to 0.65.

12. The battery according to claim 8 ,
wherein the static friction coefficient is greater than or equal to 0.57 and less than or equal to 0.59.

13. The battery according to claim 7 ,
wherein the battery is a secondary battery.

14. A battery comprising:
a first negative electrode current collector;
a first negative electrode active material layer over and in contact with a top surface of the first negative electrode current collector;
a first positive electrode active material over the first negative electrode active material layer;
a first positive electrode current collector over and in contact with a top surface of the first positive electrode active material layer;
a second positive electrode current collector over and in contact with a whole top surface of the first positive electrode current collector;
a gel electrolyte and a separator that are between the first negative electrode current collector and the first positive electrode current collector,
wherein the second positive electrode current collector is able to slide on the top surface of the first positive electrode current collector.

15. The battery according to claim 14 ,
wherein a static friction coefficient between the first positive electrode current collector and the second positive electrode current collector is less than or equal to 0.80.

16. The battery according to claim 14 ,
wherein the gel electrolyte includes poly(dimethylaminoethyl methacrylate).

17. The battery according to claim 15 ,
wherein the static friction coefficient is greater than or equal to 0.01 and less than or equal to 0.80.

18. The battery according to claim 15 ,
wherein the static friction coefficient is greater than or equal to 0.20 and less than or equal to 0.65.

19. The battery according to claim 15 ,
wherein the static friction coefficient is greater than or equal to 0.57 and less than or equal to 0.59.

20. The battery according to claim 14 ,
wherein the battery is a secondary battery.

Assignees

• Semiconductor Energy Lab

Inventors

• Yoneda Yumiko
• Yamakaji Masaki
• Tajima Ryota
• Hiroki Masaaki

Classifications

• H01M50/122

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/124

  having a layered structure · CPC title

• H01M50/119

  Metals · CPC title

• H01M50/121

  Organic material · CPC title

• H01M4/70

  characterised by shape or form · CPC title