Anode and battery using the same

Patent metadata

Field	Value
Publication number	US-9246160-B2
Application number	US-74317203-A
Country	US
Kind code	B2
Filing date	Dec 22, 2003
Priority date	Dec 26, 2002
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

An anode, an anode current collector, an anode active material and a battery using the anode are provided. The anode includes the anode current collector and the anode active material. The anode current collector has a projection. The anode active material layer is formed via at least one of a vapor deposition method, a liquid-phase deposition method, a sintering method and the like.

First claim

The invention is claimed as follows:

1. An anode, comprising:
an anode current collector having a projection formed on a substrate; and
an anode active material layer being formed on and covering the anode current collector and projection through at least one method selected from the group consisting of a vapor deposition method, a liquid-phase deposition method and a sintering method, and including at least one material selected from the group consisting of silicon (Si) and silicon compounds, wherein an average diameter of the projection ranges from about 3 μm to about 10 μm, and wherein the projection includes an element capable of being alloyed with the anode active material layer.

2. The anode according to claim 1 , wherein
the anode active material layer is alloyed with the anode current collector in at least a portion of an interface with the anode current collector.

3. The anode according to claim 1 , wherein
the projection is in a particle shape selected from the group consisting of a square shape, a spherical shape, a rock shape and a block shape.

4. The anode according to claim 1 , wherein
the projection includes at least one constituent selected from the group consisting of copper (Cu), nickel (Ni), iron (Fe), aluminum (Al), indium (In), cobalt (Co), manganese (Mn), zinc (Zn), silver (Ag), tin (Sn), germanium (Ge) and lead (Pb).

5. The anode according to claim 1 , wherein
the anode active material layer is alloyed with the projection in at least a portion of an interface with the projection.

6. A battery, comprising:
a cathode;
an anode; and
an electrolyte,
wherein the anode includes an anode current collector having a projection formed on a substrate, and
an anode active material layer being formed on and covering the anode current collector and projection through at least one method selected from the group consisting of a vapor deposition method, a liquid-phase deposition method and a sintering method, and including at least one type of material selected from the group consisting of silicon (Si) and silicon compounds, wherein an average diameter of the projection ranges from about 3 μm to about 10 μm, and wherein the projection includes an element capable of being alloyed with the anode active material layer.

7. The battery according to claim 6 , wherein
the anode active material layer is alloyed with the anode current collector in at least one portion of an interface with the anode current collector.

8. The battery according to claim 6 , wherein
the projection is in a particle shape selected from the group consisting of a square shape, a spherical shape, a rock shape and a block shape.

9. The battery according to claim 6 , wherein
the projection includes at least one constituent selected from the group consisting of copper (Cu), nickel (Ni), iron (Fe), aluminum (Al), indium (In), cobalt (Co), manganese (Mn), zinc (Zn), silver (Ag), tin (Sn), germanium (Ge) and lead (Pb).

10. The battery according to claim 6 , wherein
the anode active material layer is alloyed with the projection in at least a portion of an interface with the projection.

11. The battery according to claim 6 , wherein
the electrolyte includes a solvent, an electrolyte salt and a body which retains the solvent and electrolyte salt.

12. The battery according to claim 6 , further comprising:
a package part made of a film for containing the cathode, the anode and the electrolyte therein.

13. The battery according to claim 6 , wherein
the cathode includes a lithium-containing metal composite oxide.

14. The anode according to claim 1 , wherein the average diameter of the projection ranges from about 3 μm to about 5 μm.

15. The battery according to claim 6 , wherein the average diameter of the projection ranges from about 3 μm to about 5 μm.

16. The anode according to claim 1 , wherein the projection is made of an element capable of being alloyed with the anode active material layer.

Assignees

• Kawase Kenichi
• Takada Tomoo
• Miyaki Yukio
• Sony Corp

Inventors

• Kawase Kenichi
• Takada Tomoo
• Miyaki Yukio

Classifications

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/36

  Selection of substances as active materials, active masses, active liquids · CPC title

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title