Method for preparing granules for all-solid-state battery electrode, and electrode for all-solid-state battery

Patent metadata

Field	Value
Publication number	US-2025183250-A1
Application number	US-202318837551-A
Country	US
Kind code	A1
Filing date	Mar 17, 2023
Priority date	Mar 17, 2022
Publication date	Jun 5, 2025
Grant date	—

Abstract

The present disclosure provides a method for preparing granules for an electrode for an all-solid-state battery comprising steps of (1) coating an electrically conductive material on an active material; and (2) spraying a binder on the coated active material to produce granules. Further, The present disclosure provides an all-solid-state battery using granules prepared thereby.

First claim

1 . A method for preparing granules for an electrode for an all-solid-state battery, comprising steps of:
(1) coating an electrically conductive material on an active material; and (2) spraying a binder on the coated active material to produce granules.

2 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 1 , wherein step (1) is performed by stirring the active material and the electrically conductive material in a first container having a rotating blade, and
wherein the rotating blade rotates at a peripheral speed of 20 to 100 m/s.

3 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 1 , wherein step (2) is performed in a second container having a main blade for stirring the coated active material and a sub blade for grinding an aggregated particles of the coated active material.

4 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 3 , wherein the main blade rotates at a speed of 100 to 300 rpm.

5 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 3 , wherein the sub blade rotates at a speed of 1000 to 3000 rpm.

6 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 1 , wherein the granules are spherical particles having a diameter of 30 μm to 1000 μm.

7 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 1 , wherein the granules have a porosity of 10 to 50%.

8 . The method for preparing the granules for the electrode for the all-solid-state battery according to claim 1 ,
wherein the binder is selected from the group consisting of acrylic binder, polyvinylidene fluoride, vinylidenfluoride-hexafluoropropylene copolymer, polyvinyl alcohol, starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, polyimide, polyamideimide, polyethylene, polypropylene, ethylene-propylene-diene monomer (EPDM), sulfonated EPDM, styrene butadiene rubber and fluorine rubber.

9 . An electrode for an all-solid-state battery, comprising:
granules coated with a sulfide-based solid electrolyte, wherein the granules comprise an active material, a conductive material and a binder, and wherein the granules have a porosity of 10 to 50%.

10 . The electrode for an all-solid-state battery according to claim 9 ,
wherein the granules are spherical particles having a diameter of 30 μm to 1000 μm.

11 . The electrode for an all-solid-state battery according to claim 9 ,
wherein the binder is selected from the group consisting of acrylic binder, polyvinylidene fluoride, vinylidenfluoride-hexafluoropropylene copolymer, polyvinyl alcohol, starch, hydroxypropylcellulose, regenerated cellulose, polyvinylpyrrolidone, polyimide, polyamideimide, polyethylene, polypropylene, ethylene-propylene-diene monomer (EPDM), sulfonated EPDM, styrene butadiene rubber and fluorine rubber.

12 . An all-solid-state battery, comprising:
the electrode of claim 9 as a positive electrode or a negative electrode.

Assignees

• Lg Energy Solution Ltd

Inventors

• Kim Sohee
• Kwon Hyejin
• Kim Jeonggil
• Kim Ki Tae
• Kim Taegon
• Kim Myeongsoo

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/622

  being polymers · CPC title