Method for producing carrier for electrode catalyst, precursor of carrier for electrode catalyst, and carrier for electrode catalyst, comprising same

Patent metadata

Field	Value
Publication number	US-11699795-B2
Application number	US-201816620813-A
Country	US
Kind code	B2
Filing date	Sep 6, 2018
Priority date	Sep 20, 2017
Publication date	Jul 11, 2023
Grant date	Jul 11, 2023

Abstract

A method for preparing a support for an electrode catalyst including forming first and second polymer layers having charges different from each other on a surface of a carbon support and carbonizing the result, wherein the polymers included in the first and the second polymer layers are an aromatic compound including a heteroatom, and the first or the second polymer includes a pyridine group.

First claim

The invention claimed is:

1. A method for preparing a support for an electrode catalyst comprising:
preparing a carbon support;
forming a first polymer layer on a surface of the carbon support, said first polymer layer comprising a first polymer having a charge;
forming a second polymer layer on the first polymer layer, said second polymer layer comprising a second polymer having a charge which is opposite to the charge of the first polymer; and
carbonizing the first polymer layer and the second polymer layer,
wherein the first polymer and the second polymer independently comprise an aromatic compound including a heteroatom, and
the first polymer or the second polymer comprises a pyridine group,
wherein the first polymer is a cationic polymer, and the second polymer is an anionic polymer,
wherein the forming of the first polymer layer is carried out by coating a solution comprising the first polymer and a solvent on the surface of the carbon support, and the solution further includes at least one acid among hydrochloric acid, nitric acid and sulfuric acid, and
wherein the carbonizing of the first polymer layer and the second polymer layer is carried out for 30 minutes to 2 hours at a temperature of 800° C. to 2,000° C. under an inert gas atmosphere.

2. The method for preparing a support for an electrode catalyst of claim 1 , wherein the first polymer is an anionic polymer, and the second polymer is a cationic polymer.

3. The method for preparing a support for an electrode catalyst of claim 1 , wherein the anionic polymer includes a sulfonate group.

4. The method for preparing a support for an electrode catalyst of claim 1 , wherein the forming of the second polymer layer is carried out by coating a solution comprising the second polymer and a solvent on the first polymer layer.

5. The method for preparing a support for an electrode catalyst of claim 2 , wherein the anionic polymer includes a sulfonate group.

Assignees

• Lg Chemical Ltd

Inventors

• Lee Wonkyun
• Kim Sang Hoon
• Hwang Gyo Hyun
• Cho Jun Yeon
• Kim Kwanghyun
• Choi Ran

Classifications

• H01M8/1004

  characterised by membrane-electrode assemblies [MEA] (H01M8/12 takes precedence) · CPC title

• H01M2004/8684

  Negative electrodes · CPC title

• H01M4/9083 Primary

  on carbon or graphite · CPC title

• H01M4/926

  on carbon or graphite · CPC title

• H01M4/8803 Primary

  Supports for the deposition of the catalytic active composition (H01M4/90 takes precedence) · CPC title