Three dimensional co-extruded battery electrodes

Patent metadata

Field	Value
Publication number	US-9590232-B2
Application number	US-201213727993-A
Country	US
Kind code	B2
Filing date	Dec 27, 2012
Priority date	Dec 27, 2012
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A three dimensional electrode structure having a first layer of interdigitated stripes of material oriented in a first direction, and a second layer of interdigitated stripes of material oriented in a second direction residing on the first layer of interdigitated stripes of material. A method of manufacturing a three dimensional electrode structure includes depositing a first layer of interdigitated stripes of an active material and an intermediate material on a substrate in a first direction, and depositing a second layer of interdigitated stripes of the active material and the intermediate material on the first layer in a second direction orthogonal to the first direction.

First claim

What is claimed is:

1. A three-dimensional electrode structure, comprising:
a first layer of contiguous, separated, interdigitated stripes of an active, extrudate, electrode paste material and an intermediate material, the interdigitated stripes oriented in a first direction; and
a second layer of contiguous, separated, interdigitated stripes of an active, lithium oxide, extrudate paste material and the intermediate material oriented in a second direction residing on the first layer of interdigitated stripes of material, wherein the second layer is arranged to shorten a transport distance for lithium ions in the lithium extrudate paste material, and the intermediate material consists of one of either a liquid or gel electrolyte, or a porous material filled with electrolyte.

2. The three-dimensional electrode structure of claim 1 , wherein the stripes of active material are wider than the stripes of the intermediate material.

3. The three-dimensional electrode structure of claim 1 , wherein the stripes of active material and the stripes of intermediate material have the same width.

4. The three-dimensional electrode structure of claim 1 , wherein the second layer of interdigitated stripes has a symmetric distribution of stripes with the first layer.

5. The three-dimensional electrode structure of claim 1 , wherein the second layer of interdigitated stripes has an asymmetric distribution of stripes with the second layer.

6. The three-dimensional electrode structure of claim 1 , wherein the first and second layers have different dimensions.

7. The three-dimensional electrode structure of claim 1 , further comprising a third layer of interdigitated stripes of material oriented in the first direction.

8. The three-dimensional electrode structure of claim 1 , wherein the three-dimensional electrode structure has a thickness of more than 100 micrometers.

Assignees

• Palo Alto Res Ct Inc

Inventors

• Cobb Corie Lynn
• Bae Chang-Jun

Classifications

• H01M2004/021

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

• H01M4/0411 Primary

  by extrusion · CPC title

• H01M4/366

  as layered products · CPC title

• H01M4/8864

  Extrusion · CPC title

• H01M4/0402 Primary

  Methods of deposition of the material · CPC title