Ion selective permeable membrane and ion recovery device

Patent metadata

Field	Value
Publication number	US-2023155244-A1
Application number	US-202117995676-A
Country	US
Kind code	A1
Filing date	Apr 7, 2021
Priority date	Apr 8, 2020
Publication date	May 18, 2023
Grant date	—

Abstract

An ion recovery device including an ion selective permeable membrane with an ion conductive layer containing a lithium ion conductor formed of an inorganic substance, and a support layer is formed of a porous body wherein the ion selective permeable membrane has a configuration (I). In configuration (I) the ion conductive layer is provided in contact with one principal surface side of a support layer, and an electrode is provided in contact with another principal surface side opposite to the one principal surface side on which the ion conductive layer is provided.

First claim

1 . An ion recovery device, comprising:
an ion selective permeable membrane comprising an ion conductive layer containing a lithium ion conductor formed of an inorganic substance, and a support layer is formed of a porous body, wherein the ion selective permeable membrane has a configuration (I): wherein in configuration (I) the ion conductive layer is provided in contact with one principal surface side of a support layer, and an electrode is provided in contact with another principal surface side opposite to the one principal surface side on which the ion conductive layer is provided.

2 . The ion recovery device according to claim 1 , wherein the support layer is a porous body.

3 . The ion recovery device according to claim 2 , wherein the porous body is a non-woven fabric or a porous body formed of at least one selected from the group consisting of carbon, a metal, a polymer, and a ceramic.

4 . The ion recovery device according to claim 1 , wherein the ion conductive layer includes at least one of a particle layer containing ion conductor particles and a thin film layer which is a thin film of the ion conductor.

5 . The ion recovery device according to claim 4 , wherein the ion conductive layer includes both the particle layer and the thin film layer.

6 . The ion recovery device according to claim 4 , wherein the thin film layer is a vapor deposition film.

7 . The ion recovery device according to claim 1 , wherein the ion selective permeable membrane has two of the support layers and the ion conductive layer is sandwiched between the two support layers.

8 . The ion recovery device according to claim 1 , wherein the ion conductor contains a lithium ion conductor of at least one selected from the group consisting of a lithium-containing oxide and a lithium-containing oxynitride.

9 . The ion recovery device according to claim 8 , wherein the lithium-containing oxide is an oxide containing at least one selected from the group consisting of La, Zr, Ti, Al, and Si.

10 . The ion recovery device according to claim 9 , wherein the lithium-containing oxide is at least one oxide selected from the group consisting of Li 3 PO 4 , Li—La—Zr—O (LLZO), Li—La—Ti—O (LLTO), and Li—Al—Si—P—Ti—Ge—O (LASiPTiGeO).

11 . The ion recovery device according to claim 8 , wherein the lithium-containing oxynitride is an oxide containing at least one selected from the group consisting of La, Zr, Ti, Al, and Si.

12 . The ion recovery device according to claim 11 , wherein the lithium-containing oxynitride is at least one oxynitride selected from the group consisting of Li 3 PO 4 —N(LiPON), LLZO—N(LLZON), LLTO—N(LLTON), and LASiPTiGeO-N, which are obtained by adding nitrogen to the lithium-containing oxide.

13 . The ion recovery device according to claim 1 , wherein the ion selective permeable membrane has an alkali-resistant layer, and
the alkali-resistant layer is provided over an entire surface of one principal surface of the ion conductive layer.

14 . The ion recovery device according to claim 13 , wherein the alkali-resistant layer is a layer containing at least one selected from the group consisting of a metal oxide and a metal oxynitride.

15 . The ion recovery device according to claim 1 , wherein the electrode and the catalyst are provided on at least one principal surface side in the configuration (I).

16 . The ion recovery device according to claim 15 , wherein the electrode and the catalyst are provided on at least one principal surface side in the configuration (I).

17 . The ion recovery device according to claim 1 , wherein the catalyst is provided between the ion conductive layer and the electrode.

18 . The ion recovery device according to claim 1 , wherein the catalyst is in contact with the ion conductive layer and the electrode.

19 . The ion recovery device according to claim 1 , wherein the ion selective permeable membrane has another electrode on a principal surface side opposite to the principal surface side on which the electrode is provided.

20 . The ion recovery device according to claim 1 , wherein the catalyst is a catalyst that inhibits an overvoltage required for gas generation.

21 . The ion recovery device according to claim 1 , wherein the catalyst contains at least one selected from the group consisting of nickel, tin, platinum, gold, iridium, palladium, and ruthenium.

22 . The ion recovery device according to claim 1 , wherein the ion selective permeable membrane has a porous body protective layer.

23 . (canceled)

24 . The ion recovery device according to claim 1 , wherein the ion selective permeable membrane has a configuration (II):
wherein at least one selected from the group consisting of an electrode and a catalyst is provided on another principal surface side of the ion conductive layer opposite to the one principal surface side on which the support layer is provided.

Assignees

• Idemitsu Kosan Co

Inventors

• Utsuno Futoshi
• Jia Qingxin
• Waki Ichitaro
• Tomita Hiroshi

Classifications

• B01D71/0213

  Silicon · CPC title

• B01D69/108

  Inorganic support material · CPC title

• B01D61/468

  comprising more than two electrodes · CPC title

• B01D69/1216

  Three or more layers · CPC title

• B01D61/44

  Ion-selective electrodialysis · CPC title