Continuous extruding kneader for producing mixture for electrode active material layer, and method for producing mixture for electrode active material layer, electrode laminate, and all-solid-state battery using it

Patent metadata

Field	Value
Publication number	US-2017348652-A1
Application number	US-201715613397-A
Country	US
Kind code	A1
Filing date	Jun 5, 2017
Priority date	Jun 6, 2016
Publication date	Dec 7, 2017
Grant date	—

Abstract

A continuous extrusion kneader comprising a first supply section for supplying a solid electrolyte, a first kneading section for kneading a material supplied from the first supply section to provide an intermediate mixture, a second supply section for supplying an electrode active material to the intermediate mixture, and a second kneading section for kneading the intermediate mixture and the material supplied from the second supply section, wherein the first kneading section comprises a forward kneading section for kneading the material supplied from the first supply section and conveying the material downstream, and a reverse kneading section for kneading the material supplied from the forward kneading section and applying a force in the upstream direction.

First claim

1 . A continuous extrusion kneader for producing a mixture for electrode active material layer, comprising, from upstream toward downstream,
a first supply section for supplying at least a part of a solid electrolyte, a first kneading section for kneading a material supplied from the first supply section to provide an intermediate mixture, a second supply section for supplying at least a part of an electrode active material to the intermediate mixture, and a second kneading section for kneading the intermediate mixture and the material supplied from the second supply section, wherein the first kneading section comprises a forward kneading section for kneading the material supplied from the first supply section and conveying the material downstream, and a reverse kneading section for kneading the material supplied from the forward kneading section and applying a force to the material in the upstream direction.

2 . The continuous extrusion kneader according to claim 1 , wherein the first kneading section further comprises at least one additional kneading section on the downstream side relative to the reverse kneading section, and
the additional kneading section comprises an additional forward kneading section for kneading the material supplied from the upstream and conveying the material downstream, and an additional reverse kneading section for kneading the material supplied from the additional forward kneading section and applying a force to the material in the upstream direction.

3 . The continuous extrusion kneader according to claim 2 , wherein the first kneading section comprises a plurality of additional kneading sections.

4 . The continuous extrusion kneader according to claim 1 , further comprising, between the most downstream portion of the first kneading section and the most upstream portion of the second supply section, a material supply buffering section in which while kneading the material supplied from the first kneading section, the material during kneading is forced by the material supplied from the first kneading section to be conveyed to the second supply section.

5 . The continuous extrusion kneader according to claim 1 , wherein in the first supply section, at least one selected from an electrode active material, a conduction aid, a dispersion medium and a binder is further supplied, in addition to the solid electrolyte.

6 . The continuous extrusion kneader according to claim 1 , wherein in the second supply section, at least one selected from a solid electrolyte, a conduction aid, a dispersion medium and a binder is further supplied, in addition to the electrode active material.

7 . A method for producing a mixture for electrode active material layer by using the continuous extrusion kneader according to claim 1 , the method comprising:
letting at least a part of the solid electrolyte be supplied to the first supply section and kneaded in the first kneading section to provide an intermediate mixture, and letting at least a part of the electrode active material be supplied to the intermediate mixture in the second supply section and kneaded in the second kneading section to provide a mixture for electrode active material layer.

8 . A method for manufacturing an electrode laminate having an electrode current collector and an electrode active material layer, the method comprising producing a mixture for electrode active material layer by the method according to claim 7 , and applying the mixture for electrode active material layer onto the electrode current collector to provide an electrode active material layer.

9 . A method for producing an all-solid battery in which a cathode current collector, a cathode active material layer, a solid electrolyte layer, an anode active material layer, and an anode current collector are stacked in this order, the method comprising producing an electrode laminate having the electrode current collector and the electrode active material layer by the method according to claim 8 , and stacking the electrode laminate on the solid electrolyte layer.

10 . The continuous extrusion kneader according to claim 2 , further comprising, between the most downstream portion of the first kneading section and the most upstream portion of the second supply section, a material supply buffering section in which while kneading the material supplied from the first kneading section, the material during kneading is forced by the material supplied from the first kneading section to be conveyed to the second supply section.

11 . The continuous extrusion kneader according to claim 3 , further comprising, between the most downstream portion of the first kneading section and the most upstream portion of the second supply section, a material supply buffering section in which while kneading the material supplied from the first kneading section, the material during kneading is forced by the material supplied from the first kneading section to be conveyed to the second supply section.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ishigaki Yuki
• Inoue Hiroyuki

Classifications

• H01M10/0562

  Solid materials · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M10/052

  Li-accumulators · CPC title