Method for producing all-solid-state battery, and all-solid-state battery

Patent metadata

Field	Value
Publication number	US-9634358-B2
Application number	US-201414576977-A
Country	US
Kind code	B2
Filing date	Dec 19, 2014
Priority date	Dec 26, 2013
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

An objective of the invention is to provide a method for producing an all-solid-state battery with fewer steps for minimizing warping than in the prior art, and an all-solid-state battery with lower warping. This is achieved by a method comprising the steps of: (A) disposing a first electrode active material layer on both sides of a first collector to form a first electrode layer, (B) disposing a solid electrolyte layer on each of the first electrode active material layers, (C) disposing a second electrode active material layer and a second collector on the solid electrolyte layers, in such a manner that the second electrode active material layers contact with the solid electrolyte layers, (D) pressing a stack formed in steps (A) to (C), to form a battery unit, (E) repeating steps (A) to (D) to form a plurality of battery units, and (F) stacking the plurality of battery units.

First claim

What is claimed is:

1. A method for producing an all-solid-state battery, comprising the steps of:
(A) disposing a first electrode active material layer containing a first electrode active material on both sides of a first collector having a first main surface and a second main surface, to form a first electrode layer,
(B) disposing a solid electrolyte layer containing a solid electrolyte on each of the first electrode active material layers disposed on both sides,
(C) disposing a second electrode active material layer containing a second electrode active material, and a second collector, on the solid electrolyte layers disposed on each of the first electrode active material layers, in such a manner that the second electrode active material layers contact with the solid electrolyte layers,
(D) pressing a stack comprising the second collector, second electrode active material layer, solid electrolyte layer, first electrode active material layer, first collector, first electrode active material layer, solid electrolyte layer, second electrode active material layer and second collector, formed in steps (A) to (C), to form a battery unit at a pressing pressure of 50 to 1000 MPa,
(E) repeating steps (A) to (D) to form a plurality of battery units, and
(F) stacking the plurality of battery units,
wherein, when the first electrode active material layer is a positive electrode active material layer, the second electrode active material layer is a negative electrode active material layer, and when the first electrode active material layer is a negative electrode active material layer, the second electrode active material layer is a positive electrode active material layer.

2. The method according to claim 1 , wherein the method comprises:
providing substrates,
preparing a slurry containing the solid electrolyte, and
coating and drying the slurry onto the substrates to form solid electrolyte films containing the solid electrolyte, and
wherein step (B) comprises:
simultaneously transferring the solid electrolyte film formed on the substrate onto each of the first electrode active material layers disposed on both sides, to dispose the solid electrolyte layers.

3. The method according to claim 1 , wherein the method comprises preparing a slurry containing the first electrode active material, and\
wherein step (A) comprises:
coating and drying the slurry onto both sides of the first collector having the first main surface and second main surface, to dispose the first electrode active material layer containing the first electrode active material on both sides of the first collector.

4. The method according to claim 1 , wherein step (D) comprises uniaxial pressing the stack in the direction perpendicular to the stacking surface of the stack.

5. The method according to claim 1 , wherein step (C) comprises:
disposing the second electrode active material layer on the second collector to form a second electrode layer, and
disposing the second electrode layer on the solid electrolyte layers disposed on each of the first electrode active material layers, in such a manner that the second electrode active material layers contact with the solid electrolyte layers.

6. The method according to claim 1 , wherein step (C) comprises:
disposing the second electrode active material layers on the solid electrolyte layers disposed on each of the first electrode active material layers, and
disposing the second collectors on the second electrode active material layers disposed on each of the solid electrolyte layers.

Assignees

• Toyota Motor Co Ltd

Inventors

• Matsushita Yuki

Classifications

• H01M10/4285

  Testing apparatus · CPC title

• H01M4/043

  involving compressing or compaction · CPC title

• H01M4/139

  Processes of manufacture · CPC title

• H01M10/0481

  Compression means other than compression means for stacks of electrodes and separators · CPC title

• H01M10/0585 Primary

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