Anode and battery

Patent metadata

Field	Value
Publication number	US-9806371-B2
Application number	US-201514826832-A
Country	US
Kind code	B2
Filing date	Aug 14, 2015
Priority date	Mar 20, 2006
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

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.

First claim

What is claimed is:

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 μm 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 μm 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.

Assignees

• Sony Corp

Inventors

• Hirose Takakazu
• Kawase Kenichi
• Konishiike Isamu
• Iwama Masayuki

Classifications

• H01M2300/004

  Three solvents · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• Y02E60/122

  Cross-Sectional Technologies · mapped topic