Structures for interdigitated finger co-extrusion

Patent metadata

Field	Value
Publication number	US-9899669-B2
Application number	US-201213727937-A
Country	US
Kind code	B2
Filing date	Dec 27, 2012
Priority date	Dec 27, 2012
Publication date	Feb 20, 2018
Grant date	Feb 20, 2018

Abstract

An electrode structure has an interdigitated layer of at least a first material and a second material, the second material having either higher or similar electrical conductivity of the first material and being more ionically conductivity than the first material, a cross-section of the two materials being non-rectangular.

First claim

What is claimed is:

1. An electrode structure, comprising:
an interdigitated layer of alternating regions of at least a first material and a second material, the second material:
having one of either higher or similar electrical conductivity of the first material;
being more ionically conductive than the first material;
having a higher porosity than the first material; and
having less active material than the first material;
wherein a cross-section of the two materials is trapezoidal, the electrode structure being one of either a cathode or an anode residing adjacent a separator such that the alternating portions alternate in a stacking direction, wherein the stacking direction is parallel to one of either the cathode or anode, resulting in the porosity alternating between a higher and lower porosity in contact with either the cathode or anode.

2. The structure of claim 1 , wherein the trapezoidal cross-section has sharp corners.

3. The structure of claim 1 , wherein the trapezoidal cross-section has rounded corners.

4. The structure of claim 1 , wherein the interdigitated layer comprises one of a wavy or undulating pattern.

5. The structure of claim 1 , wherein the interdigitated layer comprises a straight monolithic pattern in a print direction.

6. The structure of claim 1 , wherein the cross-section of the two materials being trapezoidal comprises stripes of materials with widths narrower at one end than at an opposite end.

7. The structure of claim 1 , wherein the cross-section of the two materials being trapezoidal comprises a widening stripe of one material and a narrowing stripe of the other.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Cobb Corie Lynn

Classifications

• H01M4/131 Primary

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

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/0411

  by extrusion · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• 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