Superhydrophobic, Nanostructured Protective Layer for Rechargeable Lithium Battery Cells Having a Metal Lithium Anode

Patent metadata

Field	Value
Publication number	US-2017229712-A1
Application number	US-201515501342-A
Country	US
Kind code	A1
Filing date	Jul 30, 2015
Priority date	Aug 4, 2014
Publication date	Aug 10, 2017
Grant date	—

Abstract

A layer combination for an electrode can be used in rechargeable electrochemical cells. The rechargeable electrochemical cells are in the form of lithium batteries, e.g. a lithium-sulfur battery or a lithium-oxygen battery. The layer combination includes at least one superhydrophobic, nanostructured protective layer which repels polar substances.

First claim

1 . A layer composite for an electrode of a rechargeable electrochemical element, the layer composite comprising:
at least one superhydrophobic, nanostructured protective layer configured to repel polar substances.

2 . The layer composite as claimed in claim 1 , wherein:
the superhydrophobic, nanostructured protective layer is made of nanostructured polypropylene, nanostructured polyethylene, nanostructured PE-PP copolymers or further polyolefins.

3 . The layer composite as claimed in claim 1 , wherein:
the superhydrophobic, nanostructured protective layer is made of nanostructured silicon or of a polymer.

4 . The layer composite as claimed in claim 1 , wherein:
the superhydrophobic, nanostructured protective layer within the layer composite is applied directly to a lithium layer or to a second electrode.

5 . Layer composite as claimed in claim 1 , wherein:
the superhydrophobic, nanostructured protective layer within the layer composite is covered by at least one second polymer layer and/or at least one second ceramic layer.

6 . The layer composite as claimed in claim 1 , wherein:
the superhydrophobic, nanostructured protective layer is applied to a lithium layer with immediate insertion of a second polymer layer and/or a second ceramic layer.

7 . The layer composite as claimed in claim 1 , further comprising:
at least one separator layer between a lithium layer and a second electrode.

8 . A process for producing a layer composite, comprising:
applying a superhydrophobic, nanostructured protective layer to a support substrate, wherein the superhydrophobic protective layer is produced by coating by:
a spray mist and subsequent drying with crosslinking or polymerization,
application using a doctor blade of a thin layer and subsequent drying, or
vapor deposition or vacuum vapor deposition and subsequent crosslinking or polymerization.

9 . A process for producing a layer composite comprising:
applying a superhydrophobic, nanostructured protective layer of nanostructured silicon to a support substrate, wherein the superhydrophobic, nanostructured protective layer is applied by sputtering, aerosol deposition or plasma enhanced chemical vapor deposition.

10 . The layer composite as claimed in claim 1 , wherein the layer composite is configured to be used in lithium batteries in traction batteries of hybrid vehicles, plug-in hybrid vehicles, electric vehicles or in electric tools, garden tools, computers, notebooks, PDAs, smartphones or cell telephones.

Assignees

• Bosch Gmbh Robert

Inventors

• Wöhrle Thomas
• Tenzer Martin

Classifications

• H01M4/628 Primary

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M4/0409

  by a doctor blade method, slip-casting or roller coating · CPC title

• H01M2/1673

  Electricity · mapped topic

• H01M4/0426

  Sputtering · CPC title

• H01M4/0428

  Chemical vapour deposition · CPC title