Process for producing a composite material

Patent metadata

Field	Value
Publication number	US-2019386311-A1
Application number	US-201916439782-A
Country	US
Kind code	A1
Filing date	Jun 13, 2019
Priority date	Jun 13, 2018
Publication date	Dec 19, 2019
Grant date	—

Abstract

A process for producing a composite material comprising at least one particulate material and at least one polymeric binder, wherein the at least one particulate material and the at least one polymeric binder are mixed with one another and mechanically processed in the presence of at least one process auxiliary which reduces the mechanical and/or chemical interaction between the surfaces of the at least one particulate material and of the at least one polymeric binder, essentially dispensing with the use of solvents, characterized in that the weight ratio of process auxiliary to polymeric binder is within a range from 3:10 to 0.1:20.

First claim

1 . A process for producing a composite material comprising at least one particulate material and at least one polymeric binder, wherein the at least one particulate material and the at least one polymeric binder are mixed with one another and mechanically processed in the presence of at least one process auxiliary which reduces the mechanical and/or chemical interaction between the surfaces of the at least one particulate material and of the at least one polymeric binder, essentially dispensing with the use of solvents, and wherein the weight ratio of process auxiliary to polymeric binder is within a range from 3:10 to 0.1:20.

2 . The process according to claim 1 , wherein a mixture comprising the at least one particulate material, the at least one polymeric binder and the at least one process auxiliary is first provided and is then mechanically processed.

3 . The process according to claim 1 , wherein the weight ratio of process auxiliary to polymeric binder is within a range from 2:10 to 0.1:10.

4 . The process according to claim 1 , wherein the process auxiliary is used in the form of particles, and the ratio of the average particle diameter of the particulate material to the average particle diameter of the particulate process auxiliary is within a range from 2000:1 to 0.4:1.

5 . The process according to claim 1 , wherein the process auxiliary is selected from solid-state lubricants and separating agents.

6 . The process according to claim 1 , wherein the at least one particulate material comprises at least one electrode active material for an electrochemical energy storage means and the polymeric binder comprises at least one polymer electrolyte.

7 . The process according to claim 1 , wherein the at least one particulate material accounts for at least 85% by weight of the constituents used, based on the total weight of the composite composition.

8 . The process according to claim 1 , wherein the composite material is provided in the form of a homogeneous film having a thickness of less than 300 μm.

9 . A process for producing a composite material comprising at least one particulate material, at least one polymeric binder and at least one process auxiliary, wherein the particulate material comprises at least one electrode active material and the polymeric binder comprises at least one polymer electrolyte, wherein the at least one particulate material and the at least one polymeric binder are mixed with one another and mechanically processed in the presence of at least one process auxiliary which reduces the mechanical and/or chemical interaction between the surfaces of the at least one particulate material and of the at least one polymeric binder, essentially dispensing with the use of solvents, and wherein the weight ratio of process auxiliary to polymeric binder is within a range from 3:10 to 0.1:20.

10 . A composite material comprising at least one particulate material, at least one polymeric binder and at least one process auxiliary, characterized in that the weight ratio of process auxiliary to polymeric binder is within a range from 3:10 to 0.1:20.

11 . The composite material according to claim 10 , wherein the particulate material comprises at least one electrode active material and the polymeric binder comprises at least one polymer electrolyte.

12 . The composite material according to claim 10 , wherein the composite material is essentially free of pores.

13 . The composite material according to claim 10 , wherein the composite material has the following composition:
(i) 85.0% to 98.9% by weight of the at least one particulate material; (ii) 1.0% to 14.9% by weight of the at least one polymeric binder; (iii) 0.1% to 3.0% by weight of the at least one process auxiliary; and (iv) 0% to 10% by weight of further process auxiliaries, based in each case on the total weight of the composite composition.

14 . An electrochemical energy storage device or an electrochemical energy converter device having an electrode made of a composite material according to claim 10 .

15 . An electrochemical energy storage device or electrochemical energy converter device comprising a composite material according to claim 10 .

Assignees

• Bosch Gmbh Robert

Inventors

• Bauer Harald
• Weydanz Wolfgang

Classifications

• H01M4/362

  Composites · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/622 Primary

  being polymers · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M4/8657

  layered · CPC title