Electrode having current correcting layers

Patent metadata

Field	Value
Publication number	US-10177371-B2
Application number	US-201514928424-A
Country	US
Kind code	B2
Filing date	Oct 30, 2015
Priority date	Oct 30, 2015
Publication date	Jan 8, 2019
Grant date	Jan 8, 2019

Abstract

Electrodes having at least one current correcting layer between the current collector and the separator drive electron flow in a direction perpendicular to the X-Y plane. Such an electrode includes a current collector, a first active material layer coated on the current collector, a first current correcting layer on the first active material layer opposite the current collector and a second active material layer on the first current correcting layer opposite the first active material layer. The first current correcting layer is a highly conductive, porous material that is not electrochemically active, the first current correcting layer being uniformly formed along an X-Y plane of the electrode.

First claim

What is claimed is:

1. An electrode comprising:
a current collector;
a first active material layer coated on the current collector;
a first current correcting layer on the first active material layer opposite the current collector; and
a second active material layer on the first current correcting layer opposite the first active material layer, wherein:
the first current correcting layer is a conductive, porous material that is not electrochemically active,
the first current correcting layer is uniformly formed along an X-Y plane of the electrode and configured to drive electron flow in a direction perpendicular to the X-Y plane,
the first current correcting layer comprises dimples in both active material-facing surfaces, and
active particles of the first active material layer and the second active material layer seat in the dimples on a respective active material-facing surface.

2. The electrode of claim 1 , wherein the first current correcting layer is formed from one or more of carbon black, graphene, carbon nanotubes, metal powder and conductive polymer.

3. The electrode of claim 2 , wherein the first current correcting layer further comprises a binder material.

4. The electrode of claim 1 , wherein the first current correcting layer is between 10 nm and 1 micron thick.

5. The electrode of claim 1 , further comprising:
a second current correcting layer on the second active material layer; and
a third active material layer on the second current correcting layer opposite the second active material layer, wherein:
the second current correcting layer is additional conductive, porous material that is not electrochemically active,
the second current correcting layer is uniformly formed along an X-Y plane of the electrode and configured to work with the first current correcting layer to drive electron flow in the direction perpendicular to the X-Y plane, and
the second current correcting layer comprises dimples in both active material-facing surfaces.

6. The electrode of claim 5 , wherein the second current correcting layer is formed from one or more of carbon black, graphene, carbon nanotubes, metal powder and conductive polymer.

7. The electrode of claim 6 , wherein the second current correcting layer further comprises a binder material.

8. The electrode of claim 5 , wherein the second current correcting layer is between 10 nm and 1 micron thick.

9. The electrode of claim 5 , wherein the first current correcting layer and the second current correcting layer are between 10 and 20 microns apart.

Assignees

• Nissan North America Inc

Inventors

• Hao Xiaoguang
• Oshihara Kenzo

Classifications

• H01M4/366 Primary

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