Separator and galvanic cell providing robust separation of anode and cathode

Patent metadata

Field	Value
Publication number	US-2016111701-A1
Application number	US-201514884568-A
Country	US
Kind code	A1
Filing date	Oct 15, 2015
Priority date	Oct 20, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

A separator having a first polymer diaphragm and a second polymer diaphragm and a layer between the first polymer diaphragm and the second polymer diaphragm including particles featuring low elasticity, the first polymer diaphragm and the second polymer diaphragm being interconnected, which may be periodically, by first support elements. In addition, a galvanic cell and a battery having such a separator are provided.

First claim

What is claimed is:

1 . A separator, comprising:
a first polymer diaphragm; a second polymer diaphragm; and a layer between the first polymer diaphragm and the second polymer diaphragm including particles having low elasticity; wherein the first polymer diaphragm and the second polymer diaphragm are interconnected by first support elements.

2 . The separator of claim 1 , wherein the particles having low elasticity are made of oxidic, sulphidic, sulphidic-phosphidic or phosphatic ion conductors or mixtures thereof.

3 . The separator of claim 1 , wherein an interspace between the low-elasticity particles is filled at least partially with an electrolyte, an ion-conducting gel, and/or a block copolymer made of an ion-conducting polymer and a scaffold-forming polymer.

4 . The separator of claim 1 , wherein the layer includes a fiber network.

5 . The separator of claim 1 , wherein at least one of the first polymer diaphragm and the second polymer diaphragm is made from a lithium-stable polymer or a voltage-stable material.

6 . The separator of claim 1 , wherein a thermochemical adhesive agent is situated between the first polymer diaphragm and the first support elements, and/or between the second polymer diaphragm and the first support elements.

7 . A galvanic cell, comprising:
a separator, including:
a first polymer diaphragm;
a second polymer diaphragm; and
a layer between the first polymer diaphragm and the second polymer diaphragm including particles having low elasticity;
wherein the first polymer diaphragm and the second polymer diaphragm are interconnected by first support elements;
a cathode having first active material and a first current collector, the cathode adjoining the first polymer diaphragm; and
an anode having a second active material and a second current collector, the anode adjoining the second polymer diaphragm.

8 . The galvanic cell of claim 7 , wherein the second current collector is connected to the second polymer diaphragm of the separator via second support elements, and wherein a space for accommodating the second active material is situated between the second current collector and the second polymer diaphragm of the separator.

9 . The galvanic cell of claim 7 , wherein the cathode has a porous ion-conducting structure, which includes reservoirs having the first active material.

10 . The galvanic cell of claim 7 , wherein the second current collector is connected periodically to the second polymer diaphragm of the separator via second support elements, and wherein a space for accommodating the second active material is situated between the second current collector and the second polymer diaphragm of the separator.

11 . A battery, comprising:
a galvanic cell having a separator, including:
a first polymer diaphragm;
a second polymer diaphragm; and
a layer between the first polymer diaphragm and the second polymer diaphragm including particles having low elasticity;
wherein the first polymer diaphragm and the second polymer diaphragm are interconnected by first support elements;
a cathode having first active material and a first current collector, the cathode adjoining the first polymer diaphragm; and
an anode having a second active material and a second current collector, the anode adjoining the second polymer diaphragm.

12 . The separator of claim 1 , wherein the first polymer diaphragm and the second polymer diaphragm are interconnected periodically by the first support elements.

13 . The separator of claim 1 , wherein an interspace between the low-elasticity particles is filled at least partially with an electrolyte, an ion-conducting gel, especially a polyethylene oxide oxide-ion-conducting gel, and/or a block copolymer made of an ion-conducting polymer and a scaffold-forming polymer.

Assignees

• Bosch Gmbh Robert

Inventors

• Schumann Bernd
• Fanous Jean

Classifications

• H01M10/052 Primary

  Li-accumulators · CPC title

• H01M50/42

  Acrylic resins · CPC title

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• H01M50/426

  Fluorocarbon polymers · CPC title

• H01M50/417

  Polyolefins · CPC title