Separator-Cathode Current Collector Element

Patent metadata

Field	Value
Publication number	US-2016087321-A1
Application number	US-201514861215-A
Country	US
Kind code	A1
Filing date	Sep 22, 2015
Priority date	Sep 22, 2014
Publication date	Mar 24, 2016
Grant date	—

Abstract

A separator-cathode current collector element for a metal-oxygen cell, in particular for a lithium-oxygen cell, includes a porous cathode current collector and a separator coating disposed on one side of the current collector in order to improve performance and lifespan of the cell. A process for producing a separator-cathode current collector element includes coating one side of the porous cathode current collector with the separator material. A cell and a battery can be equipped with the separator-cathode current collector element.

First claim

What is claimed is:

1 . A process of producing a separator-cathode current collector element for a metal-oxygen cell, comprising:
coating one side of a porous cathode current collector with a separator material.

2 . The process according to claim 1 , further comprising:
coating an other side of the current collector with a cathode material such that the cathode material penetrates into pores of the current collector.

3 . The process according to claim 2 , wherein the coating of the other side of the current collector with the cathode material is performed via a suspension that includes cathode material.

4 . The process according to claim 2 , further comprising:
prior to the coating of the other side of the current collector with the cathode material, performing at least one of:
drying the coating of separator material; and
sintering the coating of separator material.

5 . The process according to claim 4 , wherein the sintering of the coating of separator material includes heating the coating of separator material to a temperature that is equal to or greater than 800° C. and less than or equal to 1,200° C.

6 . The process according to claim 1 , wherein the coating of the one side of the current collector with the separator material is performed via a suspension that includes separator material.

7 . The process according to claim 1 , wherein the current collector is at least one of:
(i) configured as a felt, woven fabric, or foam; and (ii) formed from at least one of carbon, aluminum, and nickel.

8 . The process according to claim 1 , wherein the separator material includes at least one of:
at least one inorganic solid-state lithium ion conductor; and at least one polymer electrolyte which either conducts lithium ions or is configured to conduct lithium ions.

9 . A separator-cathode current collector element for a metal-oxygen cell, comprising:
a porous cathode current collector; and a separator coating disposed on one side of the current collector.

10 . The current collector element according to claim 9 , wherein the current collector is configured as a felt, a woven fabric, or foam.

11 . The current collector element according to claim 9 , wherein the current collector is formed from at least one of carbon, aluminum, and nickel.

12 . The current collector element according to claim 9 , further comprising:
a cathode material positioned at an other side of the current collector, wherein the cathode material includes at least one catalyst configured to at least one of:
catalyze oxidation of oxygen ions to elemental oxygen; and
reduce elemental oxygen to oxygen ions.

13 . The current collector element according to claim 9 , wherein the separator coating includes at least one of (i) at least one inorganic solid-state lithium ion conductor, and (ii) at least one polymer electrolyte that either conducts lithium ions or is configured to conduct lithium ions.

14 . The current collector element according to claim 9 , wherein the current collector element is configured for a lithium-oxygen cell.

15 . The current collector element according to claim 9 , wherein the current collector element is produced via the process according to claim 1 .

16 . A lithium-metal cell, comprising:
a separator-cathode current collector element that includes:
a porous cathode current collector; and
a separator coating disposed on one side of the current collector;
wherein the current collector element is produced by coating one side of a porous cathode current collector with a separator material.

Assignees

• Bosch Gmbh Robert

Inventors

• Wöhrle Thomas
• Eberle Felix
• Godbole Vikram Anil

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M4/8807

  Gas diffusion layers · CPC title

• H01M2/1673

  Electricity · mapped topic

• H01M4/8626

  characterised by the form · CPC title