Anode and battery

• US 9,806,371 B2
• Filed: 08/14/2015
• Issued: 10/31/2017
• Est. Priority Date: 03/20/2006
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Hirose, Takakazu, Kawase, Kenichi, Konishiike, Isamu, Iwama, Masayuki
• Primary Examiner(s): Mayes, Melvin C
• Assistant Examiner(s): Forrest, Michael
• Application Number:
  US14/826,832
• Publication Number:
  US 20150349340A1
• Time in Patent Office: 809 Days
• Field of Search: None
• CPC Class Codes: H01M 10/0431 Cells with wound or folded electrodes H01M10/045 takes precedence
• 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 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 2300/004 Three solvents
• CPC Class Codes: H01M 4/0423 Physical vapour deposition
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/582 Halogenides
• CPC Class Codes: H01M 50/107 having curved cross-section, e.g. round or elliptic H01M50/103, H01M50/109, H01M50/11 take precedence
• CPC Class Codes: H01M 50/109 of button or coin shape
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

An anode capable of preventing expansion of an anode active material layer and a battery using it are provided. The anode includes an anode current collector, and an anode active material layer containing silicon (Si) as an element, wherein the anode active material layer therein contains at least one selected from the group consisting of a fluoride of an alkali metal and a fluoride of an alkali earth metal.

Claims

1. A battery comprising:

a cathode;

an anode; and

an electrolyte,

wherein,

the anode comprises an anode active material layer, and

the anode active material layer comprises silicon and a fluoride of an alkali metal, where a content of the fluoride is in an amount from 1 atomic % to 40 atomic %, inclusive, as a total amount of the alkali metal and fluorine, the fluoride of the alkali metal being in the anode active material layer.

2. The battery according to claim 1, wherein the fluoride includes at least one selected from the group consisting of lithium fluoride, sodium fluoride and potassium fluoride.

3. The battery according to claim 1, wherein the anode active material layer has an active material particle comprising silicon as an element, and at least part of the active material particle comprises the fluoride in the particle.

4. The battery according to claim 1, wherein the anode includes an anode current collector, and the anode active material layer is alloyed with the anode current collector at least in part.

5. The battery according to claim 1, wherein the anode active material layer further comprises at least one metal element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni), and titanium (Ti).

6. The battery according to claim 5, wherein a content of the metal element in the anode active material layer is from 0.5 atomic % to 30 atomic %.

7. The battery according to claim 1, wherein the anode includes an anode current collector, and a surface roughness of the anode current collector is 0.1 μ

m or more in units of an Ra value.

8. The battery according to claim 3, wherein the anode active material particles form a plurality of secondary particles, and the secondary particles are separated by a groove.

9. The battery according to claim 1 is a coin type battery, a spirally wound laminated type battery, a cylinder type battery, a square type battery, a button type battery, a thin type battery or a laminated type battery.

10. A battery comprising:

a cathode;

an anode; and

an electrolyte,

wherein,

the anode comprises an anode active material layer,

the anode active material layer comprises silicon and a fluoride of an alkali earth metal, where a content of the fluoride is in an amount from 0.5 atomic % to 30 atomic %, inclusive, as a total amount of the alkali earth metal and fluorine, the fluoride of the alkali earth metal being in the anode active material layer.

11. The battery according to claim 10, wherein the fluoride includes at least one selected from the group consisting of magnesium fluoride, calcium fluoride and strontium fluoride and barium fluoride.

12. The battery according to claim 10, wherein the anode includes an anode current collector, and the anode active material layer is alloyed with the anode current collector at least in part.

13. The battery according to claim 10, wherein the anode active material layer further comprises at least one metal element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni), and titanium (Ti).

14. The battery according to claim 13, wherein a content of the metal element in the anode active material layer is from 0.5 atomic % to 30 atomic %.

15. The battery according to claim 10, wherein the anode includes an anode current collector, and a surface roughness of the anode current collector is 0.1 μ

m or more in units of an Ra value.

16. The battery according to claim 10 is a coin type battery, a spirally wound laminated type battery, a cylinder type battery, a square type battery, a button type battery, a thin type battery or a laminated type battery.

17. An anode active material comprising silicon and a fluoride of an alkali metal, where a content of the fluoride is in an amount from 1 atomic % to 40 atomic %, inclusive, as a total abundance of the alkali metal and fluorine.

18. The anode active material according to claim 17, wherein the fluoride includes at least one selected from the group consisting of lithium fluoride, sodium fluoride and potassium fluoride.

19. An anode active material comprising silicon and a fluoride of an alkali earth metal, where a content of the fluoride is in an amount from 0.5 atomic % to 30 atomic %, inclusive, as a total abundance of the alkali earth metal and fluorine.

20. The anode active material according to claim 19, wherein the fluoride includes at least one selected from the group consisting of magnesium fluoride, calcium fluoride and strontium fluoride and barium fluoride.