Separator for an electrochemical storage system, method for the production of an electrode material and electrochemical energy storage system

Patent metadata

Field	Value
Publication number	US-10290846-B2
Application number	US-201515317668-A
Country	US
Kind code	B2
Filing date	May 19, 2015
Priority date	Jun 12, 2014
Publication date	May 14, 2019
Grant date	May 14, 2019

Abstract

A separator for an electrochemical storage system, which is arrangeable between an anode and a cathode of the electrochemical storage system, is disclosed. The separator is formed from a semipermeable carrier material. The carrier material is formed from a fiberglass fleece where at least one surface side of the fiberglass fleece facing a cathode is modified in such a way that it is impermeable for an active material of the cathode. A method for the production of a separator is also disclosed.

First claim

The invention claimed is:

1. A method for production of a separator, wherein the separator comprises:
a semipermeable carrier material;
wherein the separator is disposable between an anode and a cathode of the electrochemical storage system;
wherein the semipermeable carrier material is formed from a fiberglass fleece and wherein a surface side of the fiberglass fleece is modified such that the surface side is impermeable for an active material of the cathode;
and comprising the steps of:
a) homogeneous wetting with concentrated acid on the surface side of the fiberglass fleece;
b) thermal pressing of the fiberglass fleece wetted with the concentrated acid;
c) drying the thermally pressed fiberglass fleece at a predetermined temperature;
d) cleaning the dried fiberglass fleece with demineralized water;
e) drying the cleaned fiberglass fleece using a vacuum; and
f) pressing the dried fiberglass fleece and subsequent cooling of the pressed dried fiberglass fleece.

2. The method according to claim 1 , wherein the surface side is impermeable for sulphur compounds.

3. The method according to claim 1 , wherein the fiberglass fleece is permeable for an active material of the anode and wherein the active material of the anode comprises metal ions.

4. The method according to claim 1 , wherein the concentrated acid is nitric acid.

5. The method according to claim 1 , wherein the fiberglass fleece is pressed flat according to steps b) and f).

6. The method according to claim 1 , wherein the fiberglass fleece has an electrolyte disposed therein.

7. The method according to claim 6 , wherein the electrolyte is an organic, liquid electrolyte.

Assignees

• Daimler Ag

Inventors

• Hintennach Andreas

Classifications

• H01M50/437

  Glass · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M2/145

  Electricity · mapped topic

• H01M2/1613 Primary

  Electricity · mapped topic

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title