Electrode material, and electrode layer, battery, and electrochromic device using the electrode material

Patent metadata

Field	Value
Publication number	US-10283776-B2
Application number	US-201515508257-A
Country	US
Kind code	B2
Filing date	Aug 27, 2015
Priority date	Sep 11, 2014
Publication date	May 7, 2019
Grant date	May 7, 2019

Abstract

The present invention provides an electrode material comprising at least one of metal compound powder and carbon powder, the powder having an average particle size of 50 μm or less and an activation energy E α of 0.05 eV or less. Further, the powder preferably has hopping conduction characteristics at room temperature of 25° C. Furthermore, the powder preferably has an amount of oxygen defects of 1×10 18 cm −3 or more. Still further, the powder preferably has a carrier density of 1×10 18 cm −3 or more. Due to above structure, there can be provided an electrode material having a high storage capacity and a high charge/discharge efficiency.

First claim

The invention claimed is:

1. An electrode material comprising at least one metal compound powder selected from the group consisting of tungsten oxide, molybdenum oxide, Mo x W y O z , where 0<x≤1, 0<y≤1, x+y=1, and 2≤z≤3, lithium tungstate, lithium molybdate and molybdenum sulfide,
wherein the at least one metal compound powder has an average particle size of 50 μm or less, an activation energy E α of 0.05 eV or less, a carrier density of 1×10 18 cm −3 or more, and wherein an amount of oxygen defects in the at least one metal compound powder is 1×10 18 cm −3 or more.

2. The electrode material according to claim 1 , wherein the at least one metal compound powder has hopping conduction characteristics at room temperature of 25° C.

3. The electrode material according to claim 1 , wherein the at least one metal compound powder has hopping conduction characteristics with a 1000/T value in a range of 2.8 to 4.0 when a measurement temperature is referred to as T (° K).

4. The electrode material according to claim 1 , wherein the at least one metal compound powder has a resistivity of 10 Ωcm or less at room temperature of 25° C.

5. The electrode material according to claim 1 , wherein the at least one metal compound powder has an average particle size of 10 μm or less.

6. An electrode layer comprising 50 mass % or more and 100 mass % or less of the electrode material according to claim 1 .

7. A battery comprising the electrode layer according to claim 6 .

8. The battery according to claim 7 , comprising the electrode layer as an anode.

9. An electrochromic device comprising the electrode material according to claim 1 .

10. The electrode material according to claim 1 , wherein the at least one metal compound powder has hopping conduction characteristics with a 1000/T value in a range of 2.8 to 4.0 when a measurement temperature is referred to as T (° K), and wherein the at least one metal compound powder has a resistivity of 10 Ωcm or less at room temperature of 25° C.

11. The battery according to claim 8 , wherein the at least one metal compound powder of the electrode material has hopping conduction characteristics with a 1000/T value in a range of 2.8 to 4.0 when a measurement temperature is referred to as T (° K).

12. The electrochromic device according to claim 9 , wherein the at least one metal compound powder of the electrode material has hopping conduction characteristics with a 1000/T value in a range of 2.8 to 4.0 when a measurement temperature is referred to as T (° K).

Assignees

• Toshiba Kk
• Toshiba Materials Co Ltd

Inventors

• Sasaki Akito
• Oozu Hideyuki
• Kataoka Yoshinori
• Kakushima Kuniyuki
• Li Wei
• Iwai Hiroshi

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01M4/587 Primary

  for inserting or intercalating light metals · CPC title

• H01M2004/027

  Negative electrodes · CPC title