Polymer electrolyte membrane for fuel cell and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9761900-B2
Application number	US-201214131544-A
Country	US
Kind code	B2
Filing date	Jul 30, 2012
Priority date	Jul 29, 2011
Publication date	Sep 12, 2017
Grant date	Sep 12, 2017

Abstract

Disclosed are a polymer electrolyte membrane showing high ion conductivity even under the condition of low humidity and high temperature and a method for manufacturing the same. The polymer electrolyte membrane of the present invention comprises a porous substrate, a self proton conducting material dispersed in the porous substrate, and an ion conductor impregnated in the porous substrate. The self proton conducting material comprises an inorganic particle functionalized with an azole ring.

First claim

The invention claimed is:

1. A polymer electrolyte membrane comprising:
a porous substrate;
an ion conductor impregnated in the porous substrate; and
inorganic particles dispersed in the porous substrate,
wherein the organic particles are formed of SiO 2 , TiO 2 , SnO 2 , CaO, SrO, or BaO and functionalized with an azole ring compound.

2. The polymer electrolyte membrane of claim 1 , wherein the azole ring compound is pyrazole, imidazole, triazole, tetrazole, thiazole, or oxazole.

3. The polymer electrolyte membrane of claim 1 , wherein the porous substrate is formed of a first hydrocarbon polymer, and the ion conductor is a second hydrocarbon polymer having a sulfonic acid group.

4. The polymer electrolyte membrane of claim 3 , wherein the porous substrate is a polyimide web comprising a fiber having a cross-section diameter of 0.005 to 10 μm.

5. The polymer electrolyte membrane of claim 1 , wherein the porous substrate comprises a fiber forming a three-dimensional network, and the inorganic particles are on a surface of the fiber.

6. The polymer electrolyte membrane of claim 1 , wherein the porous substrate comprises a fiber forming a three-dimensional network, and the inorganic particles are inside the fiber.

7. The polymer electrolyte membrane of claim 1 , further comprising a polymer having a hydrophilic group, the polymer being coated on the porous substrate.

8. The polymer electrolyte membrane of claim 7 , wherein the polymer having the hydrophilic group is polyurethane, polyvinyl alcohol, polyethylene oxide, polypropylene oxide, polymethylene oxide, polyethylene oxide methacrylate, polyethylene oxide acrylate, polyethylene oxide dimethacrylate, polyethylene oxide diacrylate, polyhydroxyethylmethylacrylate, or copolymer thereof.

9. The polymer electrolyte membrane of claim 1 , wherein the porous substrate comprises a fiber forming a three-dimensional network, and at least a portion of the fiber comprises a polymer having a hydrophilic group.

10. The polymer electrolyte membrane of claim 9 , wherein the polymer having the hydrophilic group is polyurethane, polyvinyl alcohol, polyethylene oxide, polypropylene oxide, polymethylene oxide, polyethylene oxide methacrylate, polyethylene oxide acrylate, polyethylene oxide dimethacrylate, polyethylene oxide diacrylate, polyhydroxyethylmethylacrylate, or copolymer thereof.

Assignees

• Lee Dong Hoon
• Lee Moo-Seok
• Kim Na Young
• Shin Yong-Cheol
• Kolon Inc

Inventors

• Lee Dong Hoon
• Lee Moo-Seok
• Kim Na Young
• Shin Yong-Cheol

Classifications

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M8/106 Primary

  characterised by the chemical composition of the porous support · CPC title

• C08J2379/04

  Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors · CPC title

• H01M8/1051

  Non-ion-conducting additives, e.g. stabilisers, SiO2 or ZrO2 · CPC title

• H01M2300/0091

  in the form of mixtures · CPC title