NEGATIVE ELECTRODE ACTIVE MATERIAL FOR POWER STORAGE DEVICE

• US 20180219221A1
• Filed: 07/22/2016
• Published: 08/02/2018
• Est. Priority Date: 08/20/2015
• Status: Active Grant

• Current Assignee: Nippon Electric Glass Company Limited
• Original Assignee: Nippon Electric Glass Company Limited
• Inventors: YAMAUCHI, Hideo
• Granted Patent: US 11,165,057 B2
• Time in Patent Office: Days
• CPC Class Codes: H01G 11/06 with one of the electrodes allowing ions to be reversibly doped thereinto, e.g. lithium ion capacitors [LIC]
• CPC Class Codes: H01G 11/30 characterised by their material
• CPC Class Codes: H01G 11/46 Metal oxides
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 10/0567 characterised by the additives
• CPC Class Codes: H01M 10/0569 characterised by the solvents
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/136 Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
• CPC Class Codes: H01M 4/386 Silicon or alloys based on silicon
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: H01M 4/583 Carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/621 Binders
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

Provided is a negative electrode active material for a power storage device that has a low operating potential, can increase the operating voltage of the power storage device, and has excellent cycle characteristics. The negative electrode active material for a power storage device, the negative electrode active material containing as elements at least one selected from Si, B, and P; Nb; and O.

Claims

1. :

A negative electrode active material for a power storage device, the negative electrode active material containing as elements at least one selected from Si, B, P, and Al;

Nb; and

O.

2. :

The negative electrode active material for a power storage device according to claim 1, the negative electrode active material containing, in terms of % by mole of oxide, 5 to 90% Nb₂O₅ and 5 to 85% SiO₂+B₂O₃+P₂O₅+Al₂O₃.

3. :

The negative electrode active material for a power storage device according to claim 2, the negative electrode active material further containing, in terms of % by mole of oxide, 1 to 70% R₂O+R′

O (where R represents at least one selected from Li, Na, and K and R′

represents at least one selected from Mg, Ca, Ba, Zn, and Sr).

4. :

The negative electrode active material for a power storage device according to claim 3, wherein R₂O is Na₂O.

5. :

The negative electrode active material for a power storage device according to claim 1, the negative electrode active material containing an amorphous phase.

6. :

The negative electrode active material for a power storage device according to claim 1, wherein the negative electrode active material is for use in a sodium-ion secondary battery.

7. :

A negative electrode material for a power storage device, the negative electrode material containing the negative electrode active material for a power storage device according to claim 1.

8. :

A negative electrode for a power storage device, the negative electrode containing the negative electrode material for a power storage device according to claim 7.

9. :

A power storage device comprising the negative electrode for a power storage device according to claim 8.