Electricity storage device and method for manufacturing electricity storage device

Patent metadata

Field	Value
Publication number	US-9640606-B2
Application number	US-201514663266-A
Country	US
Kind code	B2
Filing date	Mar 19, 2015
Priority date	Mar 24, 2014
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

An electricity storage device includes a first electrode, a second electrode, an electricity storage layer, and a p-type semiconductor layer. The electricity storage layer is placed between the first electrode and the second electrode. The electricity storage layer contains a mixture of an insulating material and n-type semiconductor particles. The p-type semiconductor layer is placed between the electricity storage layer and the second electrode. The n-type semiconductor particles contain at least one of a titanium-niobium composite oxide and a titanium-tantalum composite oxide.

First claim

What is claimed is:

1. An electricity storage device comprising:
a first electrode;
a second electrode;
an electricity storage layer which is placed between the first electrode and the second electrode and which contains a mixture of an insulating material and n-type semiconductor particles; and
a p-type semiconductor layer placed between the electricity storage layer and the second electrode,
wherein the n-type semiconductor particles contain at least one of the group consisting of a titanium-niobium composite oxide and a titanium-tantalum composite oxide,
the n-type semiconductor particles have an average size of 1 nm to 20 nm, and
the average size is an average of value a of fifty n-type semiconductor particles, where value αof one of the fifty n-type semiconductor particles is 2×(S/3.14) 1/2 and S is an area of the one of the fifty n-type semiconductor particles in an image observed with an electron microscope.

2. The electricity storage device according to claim 1 , wherein the n-type semiconductor particles contain the titanium-niobium composite oxide as an essential component.

3. The electricity storage device according to claim 1 , wherein the n-type semiconductor particles contain a titanium-niobium composite oxide, the sum of the content of titanium, the content of niobium, and the content of oxygen in the titanium-niobium composite oxide is 80 atomic percent or more.

4. The electricity storage device according to claim 1 , wherein the n-type semiconductor particles contain the titanium-tantalum composite oxide as an essential component.

5. The electricity storage device according to claim 1 , wherein the n-type semiconductor particles contain a titanium-tantalum composite oxide, the sum of the content of titanium, the content of tantalum, and the content of oxygen in the titanium-tantalum composite oxide is 80 atomic percent or more.

6. The electricity storage device according to claim 1 , wherein the first or second electrode is made of at least one selected from the group consisting of silver, copper, gold, iron, aluminum, nickel, titanium, chromium, and molybdenum; an alloy of any selective combination of these metals; or a conductive oxide.

7. The electricity storage device according to claim 1 , wherein the p-type semiconductor layer contains a p-type oxide semiconductor.

8. The electricity storage device according to claim 7 , wherein the p-type oxide semiconductor is nickel oxide or a copper-aluminum oxide.

9. The electricity storage device according to claim 1 , wherein the insulating material is an insulating resin or an inorganic insulator.

10. The electricity storage device according to claim 1 , wherein the insulating material is silicone or silicon dioxide.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sagara Akihiko
• Fujinoki Norihito
• Nomura Yuki
• Habuta Haruhiko

Classifications

• H10P14/3434

  being oxide semiconductor materials (Group IIB-VIA semiconductor materials H10P14/3424) · CPC title

• H10P14/265

  using solutions · CPC title

• H10P14/46

  using a liquid · CPC title

• H10P14/38

  characterised by treatments done after the formation of the materials · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title