Polymer solid electrolyte, method of production thereof, and lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-9929428-B2
Application number	US-201213462319-A
Country	US
Kind code	B2
Filing date	May 2, 2012
Priority date	May 11, 2011
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A polymer solid electrolyte is provided that includes anatase-type titanium oxide, a lithium electrolyte salt, and an ion conductive polymer that binds the titanium oxide.

First claim

What is claimed is:

1. A polymer solid electrolyte comprising:
anatase-type titanium oxide;
a lithium electrolyte salt; and
an ion conductive polymer that covers the anatase-type titanium oxide,
wherein a content of the ion conductive polymer is 2.5 to 5 weight % with respect to the total mass of a mixture of the ion conductive polymer and the anatase-type titanium oxide.

2. The polymer solid electrolyte according to claim 1 , wherein the ion conductive polymer is polyvinylidene fluoride.

3. The polymer solid electrolyte according to claim 1 , wherein the content of the anatase-type titanium oxide is 20 to 90 weight % with respect to the total mass of the polymer solid electrolyte.

4. The polymer solid electrolyte according to claim 1 , wherein the lithium electrolyte salt includes at least one of LiN(SO 2 CF 3 ) 2 and LiN(SO 2 C 2 F 5 ) 2 .

5. A lithium ion secondary battery comprising:
a positive electrode;
a negative electrode; and
the polymer solid electrolyte of claim 1 , disposed between the positive electrode and the negative electrode.

6. A lithium ion secondary battery comprising:
a positive electrode;
a negative electrode; and
the polymer solid electrolyte of claim 2 , disposed between the positive electrode and the negative electrode.

7. A lithium ion secondary battery comprising:
a positive electrode;
a negative electrode; and
the polymer solid electrolyte of claim 3 , disposed between the positive electrode and the negative electrode.

8. A lithium ion secondary battery comprising:
a positive electrode;
a negative electrode; and
the polymer solid electrolyte of claim 4 , disposed between the positive electrode and the negative electrode.

9. The polymer solid electrolyte according to claim 1 , wherein the ion conductive polymer surface coats the anatase-type titanium oxide.

10. The polymer solid electrolyte according to claim 1 , wherein the polymer solid electrolyte does not contain a solvent.

Assignees

• Yokoyama Tomofumi
• Seiko Epson Corp

Inventors

• Yokoyama Tomofumi

Classifications

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M10/052 Primary

  Li-accumulators · CPC title

• H01M10/056

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title