Method of separating solid electrolyte and cathode active material which are contained in slurry

Patent metadata

Field	Value
Publication number	US-2020269155-A1
Application number	US-202016790571-A
Country	US
Kind code	A1
Filing date	Feb 13, 2020
Priority date	Feb 27, 2019
Publication date	Aug 27, 2020
Grant date	—

Abstract

A method of easily separating a solid electrolyte and a cathode active material which are contained in a slurry is disclosed. The method of separating a solid electrolyte and a cathode active material which are contained in a slurry includes: adding a fluorine-based solvent to the slurry containing the solid electrolyte and the cathode active material, the cathode active material containing at least one selected from nickel, cobalt and manganese as a constituent element.

First claim

What is claimed is:

1 . A method of separating a solid electrolyte and a cathode active material which are contained in a slurry, the method comprising:
adding a fluorine-based solvent to the slurry containing the solid electrolyte and the cathode active material, the cathode active material containing at least one selected from nickel, cobalt and manganese as a constituent element.

2 . The method according to claim 1 , wherein the fluorine-based solvent does not have a hydrocarbon group.

3 . The method according to claim 1 , wherein the fluorine-based solvent is a perfluoroalkane.

4 . The method according to claim 1 , wherein the solid electrolyte is a sulfide solid electrolyte.

5 . The method according to claim 1 , wherein
a phase of a solvent constituting the slurry and a phase of the fluorine-based solvent are separated from each other, and the phase of the solvent constituting the slurry is on a top side of the phase of the fluorine-based solvent in a stationary state.

6 . The method according to claim 1 , wherein the solvent constituting the slurry is butyl butyrate.

7 . The method according to claim 1 , wherein the slurry contains a conductive additive that is constituted of carbon.

8 . The method according to claim 1 , wherein the slurry contains a binder.

Assignees

• Toyota Motor Co Ltd

Inventors

• Hashimoto Yuichi

Classifications

• Y02W30/84

  Recycling of batteries or fuel cells · CPC title

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• B01D21/00 Primary

  Separation of suspended solid particles from liquids by sedimentation ({separation of ores or the like by sedimentation B03B5/48 - B03B5/60} ; differential sedimentation B03D3/00; {purification of water, waste water, sewage or sludge C02F, e.g.} devices for separating or removing fatty or oily substances or similar floating material from water, waste water or sewage C02F1/40) · CPC title

• H01M4/02

  Electrodes composed of, or comprising, active material · CPC title

• H01M2004/028

  Positive electrodes · CPC title