Separation method for separating constituent material from member and method for processing member

Patent metadata

Field	Value
Publication number	US-2024145802-A1
Application number	US-202218279174-A
Country	US
Kind code	A1
Filing date	Mar 29, 2022
Priority date	Mar 31, 2021
Publication date	May 2, 2024
Grant date	—

Abstract

A separation method includes the steps of: mixing a member that includes an active material and a solid electrolyte with a solvent to obtain a mixture; and subjecting the mixture to solid-liquid separation to obtain a solid component and a separated liquid. The solid electrolyte contains a lithium (Li) element, a sulfur (S) element, and a phosphorous (P) element. The solid electrolyte is dissolved in the solvent. It is preferable that the separation method further includes a step of recovering a compound that contains at least one of the Li element, the S element, and the P element from the separated liquid. It is also preferable that the separation method further includes a step of acid-dissolving the solid component to recover a carbon component.

First claim

1 . A method for separating a constituent material from a member,
the method comprising the steps of:
mixing the member that includes an active material and a solid electrolyte with a solvent to obtain a mixture; and
subjecting the mixture to solid-liquid separation to obtain a solid component and a separated liquid, wherein
the solid electrolyte contains a lithium (Li) element, a sulfur (S) element, and a phosphorous (P) element, and the solid electrolyte is dissolved in the solvent as a result of the member being mixed with the solvent.

2 . The method for separating a constituent material from a member according to claim 1 ,
wherein the solvent has a solubility for dissolving the solid electrolyte at 20° C. of 1 mg/mL or more.

3 . The method for separating a constituent material from a member according to claim 1 ,
wherein the solvent has a hydroxyl group.

4 . The method for separating a constituent material from a member according to claim 1 ,
wherein the active material contains an element M, where M represents at least one of lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), aluminum (Al), iron (Fe), titanium (Ti), niobium (Nb), silicon (Si), carbon (C), and copper (Cu).

5 . The method for separating a constituent material from a member according to claim 1 ,
wherein the solid component contains an element M, where M represents at least one of lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), aluminum (Al), iron (Fe), titanium (Ti), tin (Sn), niobium (Nb), silicon (Si), carbon (C), and copper (Cu).

6 . The method for separating a constituent material from a member according to claim 1 ,
wherein the separated liquid contains the lithium (Li) element, the sulfur (S) element, and the phosphorous (P) element.

7 . A method for processing a member, comprising the steps of:
mixing the member that includes an active material and a solid electrolyte that contains a lithium (Li) element, a sulfur (S) element, and a phosphorous (P) element with a solvent to obtain a mixture in which the solid electrolyte is dissolved in the solvent; subjecting the mixture to solid-liquid separation to obtain a solid component and a separated liquid; and recovering a compound that contains at least one of the lithium (Li) element, the sulfur (S) element, and the phosphorous (P) element from the separated liquid, wherein the solid electrolyte is dissolved in the solvent as a result of the member being mixed with the solvent.

8 . The method for processing a member according to claim 7 ,
wherein the solvent has a solubility for dissolving the solid electrolyte at 20° C. of 1 mg/mL or more.

9 . The processing method according to claim 7 ,
wherein the solvent has a hydroxyl group.

10 . The method for processing a member according to claim 7 ,
wherein the compound is at least one of lithium sulfide, phosphorus sulfide, and lithium halide.

11 . A method for processing a member, comprising the steps of:
mixing the member that includes an active material and a solid electrolyte with a solvent to obtain a mixture in which the solid electrolyte is dissolved in the solvent; subjecting the mixture to solid-liquid separation to obtain a solid component and a separated liquid; and acid-dissolving the solid component to recover a carbon component that is a dissolved residue, wherein the solid electrolyte contains a lithium (Li) element, a sulfur (S) element, and a phosphorous (P) element, and the solid electrolyte is dissolved in the solvent as a result of the member being mixed with the solvent.

12 . The method for processing a member according to claim 11 ,
wherein the solvent has a solubility for dissolving the solid electrolyte at 20° C. of 1 mg/mL or more.

13 . The method for processing a member according to claim 11 ,
wherein the solvent has a hydroxyl group.

14 . A method for processing a member, comprising the steps of:
mixing the member including an active material and a solid electrolyte with a solvent to obtain a mixture in which the solid electrolyte is dissolved in the solvent, the active material containing an element M, where M represents at least one of lithium (Li), nickel (Ni), manganese (Mn), cobalt (Co), aluminum (Al), iron (Fe), titanium (Ti), tin (Sn), niobium (Nb), silicon (Si), carbon (C), and copper (Cu); subjecting the mixture to solid-liquid separation to obtain a solid component and a separated liquid; acid-dissolving the solid component to obtain a dissolution liquid; and recovering the element M from the dissolution liquid, wherein the solid electrolyte contains a lithium (Li) element, a sulfur (S) element, and a phosphorous (P) element, and the solid electrolyte is dissolved in the solvent as a result of the member being mixed with the solvent.

15 . The method for processing a member according to claim 14 , further comprising a step of acid-dissolving the solid component to recover a carbon component that is a dissolved residue.

16 . The method for processing a member according to claim 14 ,
wherein the solvent has a solubility for dissolving the solid electrolyte at 20° C. of 1 mg/mL or more.

17 . The method for processing a member according to mon claim 14 ,
wherein the solvent has a hydroxyl group.

Assignees

• Mitsui Mining & Smelting Co Ltd

Inventors

• Takahashi Tsukasa

Classifications

• H01M10/0562

  Solid materials · CPC title

• B01D11/0257

  using mixing mechanisms, e.g. stirrers, jets (B01D11/0242 takes precedence) · CPC title

• B01D11/0284

  Multistage extraction · CPC title

• B01D11/0288

  Applications, solvents · CPC title

• H01M10/54 Primary

  Reclaiming serviceable parts of waste accumulators · CPC title