Electrode for solid-state batteries and solid-state battery

Patent metadata

Field	Value
Publication number	US-11362317-B2
Application number	US-201916519176-A
Country	US
Kind code	B2
Filing date	Jul 23, 2019
Priority date	Jul 27, 2018
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

An electrode for solid-state batteries, comprising a PTC resistor layer, and a solid-state battery comprising the electrode. The electrode may be an electrode for solid-state batteries, wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer disposed between the electrode active material layer and the current collector; wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer; and wherein a porosity of the PTC resistor layer is from 5% to 13%.

First claim

The invention claimed is:

1. An electrode for solid-state batteries,
wherein the electrode comprises an electrode active material layer, a current collector and a PTC resistor layer disposed between the electrode active material layer and the current collector;
wherein the PTC resistor layer contains an electroconductive material, an insulating inorganic substance and a polymer;
wherein a porosity of the PTC resistor layer is from 5% to 13%;
wherein the PTC resistor layer contains at least a first coating layer and a second coating layer;
wherein the second coating layer is disposed between the first coating layer and the electrode active material layer; and
wherein the second coating layer does not contain the insulating inorganic substance.

2. The electrode for solid-state batteries according to claim 1 , wherein the insulating inorganic substance is a metal oxide.

3. The electrode for solid-state batteries according to claim 1 , wherein the electroconductive material is carbon black.

4. A solid-state battery comprising a cathode, an anode and an electrolyte layer disposed between the cathode and the anode, wherein at least one of the cathode and the anode is the electrode for solid-state batteries defined by claim 1 .

5. The electrode for solid-state batteries according to claim 1 , wherein the thickness of the second coating layer is from 1 μm to 10 μm.

6. The electrode for solid-state batteries according to claim 1 , wherein the average particle diameter (D50) of the insulating inorganic substance is from 0.2 μm to 5 μm.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ose Norihiro
• Suzuki Tomoya
• Hasegawa Hajime
• Yaso Kazuo
• Nishimura Hideaki
• Matsushita Yuki

Classifications

• H01M10/0525

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

• H01M10/052

  Li-accumulators · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M4/62

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