Manufacturing method for catalyst electrode, catalyst electrode manufactured by means of method, and battery comprising same

Patent metadata

Field	Value
Publication number	US-10141577-B2
Application number	US-201214113442-A
Country	US
Kind code	B2
Filing date	May 23, 2012
Priority date	May 23, 2011
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The catalytic electrode of the present invention does not cause electron transfer resistance, unlike conventional catalytic electrodes coated with Nafion or the like, and thus can achieve significantly high electron transfer efficiency. Accordingly, the catalytic electrode can have high power density, and thus has excellent physical properties.

First claim

The invention claimed is:

1. A catalytic electrode structure, comprising an electrode support, and a porous continuous electroconductive material on the electrode support in direct contact therewith, with no binder binding the porous continuous electroconductive material onto the electrode support, wherein the porous continuous electroconductive material comprises pores whose diameters are within a range of 1 to 1000 nm, and wherein at least some of the pores are connected with each other.

2. The catalytic electrode structure of claim 1 , wherein the electrode support is either a carbon fibrous assembly or a silica structure.

3. The catalytic electrode structure of claim 1 , wherein a catalyst comprising at least one enzyme or metal catalyst is present in pores of the porous continuous electroconductive material.

4. The catalytic electrode structure of claim 1 , wherein an immobilized catalyst is at least one of covalently bonded, adsorbed, and cross-linked in pores of the porous continuous electroconductive material.

5. A cell comprising the catalytic electrode structure of claim 1 .

6. The cell of claim 5 , wherein the cell is one selected from the group consisting of a fuel cell, a biofuel cell, a solar cell, a secondary cell, and a supercapacitor.

7. A biosensor comprising the catalytic electrode structure of claim 1 .

8. A method of preparing a catalytic electrode structure, the method comprising: (1) preparing a solution mixture comprising an electroconductive precursor, a pore support precursor, and a continuous pore forming agent; (2) immersing an electrode support in the solution mixture thereby forming a continuous electroconductive material on the electrode support in direct contact therewith; (3) calcining the continuous electroconductive material to remove the continuous pore forming agent thereby forming continuous pores in the continuous electroconductive material, to provide a porous continuous electroconductive material on the electrode support in direct contact therewith, wherein the porous continuous electroconductive material comprises pores whose diameters are within a range of 1 to 1000 nm, and wherein at least some of the pores are connected with each other, with no binder binding the porous continuous electroconductive material onto the electrode support; and (4) loading a catalyst into the continuous pores in the porous continuous electroconductive material on the electrode support.

9. The method of claim 8 , wherein the electroconductive precursor comprises one or more precursors selected from the group consisting of a carbon precursor, a palladium precursor, and a platinum precursor.

10. The method of claim 9 , wherein the carbon precursor is one or more selected from the group consisting of resole, furfuryl alcohol, phenol-formaldehyde resin, resorcinol-formaldehyde resin, sucrose, pitch, and coal tar.

11. The method of claim 8 , wherein the pore support precursor is silicone alkoxide or organosilicate, the continuous pore forming agent is an amphiphilic block copolymer, and the electrode support is a carbon fibrous assembly or a silica structure.

12. The method of claim 11 , wherein the amphiphilic block copolymer comprises a hydrophilic block and a hydrophobic block, wherein the hydrophilic block is one or more selected from the group consisting of polystyrene-b-poly(ethylene oxide)(PS-b-PEO), polyisoprene-b-poly(ethlyene oxide), poly(ethylene oxide)-poly(propylene oxide)-poly(ethlyene oxide), poly(ethylene oxide), and poly(oligo(ethylene glycol)methacrylate) (POEGMA); and the hydrophobic block is one or more selected from the group consisting of poly(styrene), poly(isoprene), and poly(methyl methacrylate).

13. The method of claim 8 , wherein the solution mixture comprises, based on 100 parts by weight of a solvent, 0.5-30 parts by weight of the electroconductive precursor, 0.5-30 parts by weight of the pore support precursor, and 0.5-10 parts by weight of the continuous pore forming agent.

14. The method of claim 8 , wherein a size of the continuous pores ranges from 1 to 1000 nm, and at least some of the continuous pores are connected with each other.

15. The method of claim 8 , further comprising a step of removing the pore support precursor between steps (3) and (4).

16. The method of claim 8 , wherein the catalyst is an enzyme or a metal catalyst.

Assignees

• Kim Jungbae
• Lee Jinwoo
• Jeon Chulmin
• Shim Jongmin
• Univ Korea Res & Bus Found

Inventors

• Kim Jungbae
• Lee Jinwoo
• Jeon Chulmin
• Shim Jongmin

Classifications

• H01M4/8626 Primary

  characterised by the form · CPC title

• G01N27/4075 Primary

  Composition or fabrication of the electrodes and coatings thereon, e.g. catalysts · CPC title

• G01N27/3272

  Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels (optical biosensors G01N33/52) · CPC title

• Y02E60/527

  Cross-Sectional Technologies · mapped topic

• H01M4/8807

  Gas diffusion layers · CPC title