Ion conducting hybrid membranes

Patent metadata

Field	Value
Publication number	US-10170813-B2
Application number	US-201615148676-A
Country	US
Kind code	B2
Filing date	May 6, 2016
Priority date	Mar 6, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A method includes dispensing ion-conducting particles on a substrate comprising an adhesive to which the ion-conducting particles adhere; overcoating the ion conducting particles with a polymer; removing the substrate and the adhesive from the ion conducting particles; and removing a polymer overburden on the ion conducting particles to form a device that includes: (i) the polymer or a derivative thereof, and (ii) ion-conducting particles. At least a portion of the ion-conducting particles extend through the polymer or its derivative.

First claim

The invention claimed is:

1. A method, comprising:
dispensing ion-conducting particles on a substrate comprising an adhesive to which the ion-conducting particles adhere, wherein the ion-conducting particles conduct ions chosen from Li, Na, and combinations thereof;
overcoating the ion conducting particles with a polymer;
removing the substrate and the adhesive from the ion conducting particles; and
removing a polymer overburden on the ion conducting particles to form a device that includes: (i) the polymer or a derivative thereof, and (ii) ion-conducting particles, wherein at least a portion of the ion-conducting particles extend through the polymer or its derivative.

2. The method of claim 1 , wherein the removable substrate has at least a portion in contact with the particles, and wherein the adhesive on the substrate is either water soluble or soluble in an organic solvent.

3. The method of claim 1 , wherein the substrate is removed by mechanical, thermal and/or photochemical means.

4. The method of claim 1 , wherein the polymer or its derivative is insoluble in one or more polar solvents.

5. The method of claim 1 , wherein at least a portion of the ion conducting particles have a first exposed surface projecting from a first side of the polymer and a second exposed surface projecting from an opposed second side of the polymer, and wherein the exposed surfaces are free of the polymer.

6. The method of claim 1 , wherein an aqueous solvent, an organic solvent, or a mixture thereof, is applied to remove the adhesive layer.

7. The method of claim 1 , wherein the polymer overburden is removed by oxygen reactive ion etching, ion milling, or a combination thereof.

8. A method, comprising:
(a) dispensing metal oxide lithium ion-conducting particles on an adhesive layer;
(b) overcoating the ion conducting particles with a layer of a polymer selected from cyclo-olefins, poly-para-xylylenes, and benzocyclobutenes;
(c) removing a polymer overburden on the ion conducting particles to form a lithium ion conducting membrane, wherein at least a portion of the ion conducting particles in the membrane have a first exposed surface projecting from a first side of the layer of the polymer and a second exposed surface projecting from an opposed second side of the layer of the polymer, wherein the exposed surfaces are free of the polymer; and
(d) removing the adhesive layer from the ion conducting particles.

9. The method of claim 8 , wherein the membrane has a lithium ion conductivity greater than about 10 -5 S/cm.

10. The method of claim 8 , wherein the polymer layer is annealed prior to step (d).

11. The method of claim 8 , wherein an aqueous solvent, an organic solvent, or a mixture thereof, is applied to remove the adhesive layer.

12. The method of claim 8 , wherein the polymer overburden is removed by oxygen reactive ion etching, ion milling, or a combination thereof.

Assignees

• IBM
• Asahi Chemical Ind

Inventors

• Aetukuri Naga Phani B
• Hart Mark W
• Kim Ho-Cheol
• Kitajima Shintaro
• Krupp Leslie E
• Mccloskey Bryan D
• Miller Robert D
• Scott John Campbell
• Wilcke Winfried

Classifications

• H01M2300/0082

  Organic polymers · CPC title

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• C08J5/22

  Films, membranes or diaphragms · CPC title

• H01M12/02

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title