Unlock instant, AI-driven research and patent intelligence for your innovation.

Catalyst for fuel cell electrode, process for producing catalyst for fuel cell electrode, film-electrode assembly, and fuel cell

A fuel cell electrode and catalyst technology, which is applied in the direction of fuel cells, battery electrodes, solid electrolyte fuel cells, etc., can solve the problems of insufficient formation of three-phase boundaries, fuel cell performance limitations, etc., and achieve the effect of reducing costs and simplifying the process

Inactive Publication Date: 2009-01-21
TOYOTA JIDOSHA KK
View PDF1 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, there is a limitation in bringing the three of carbon nanotubes, catalyst components, and electrolyte components into close contact with each other.
Therefore, the three-phase boundary cannot be formed sufficiently, and there is a limit in improving fuel cell performance

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Catalyst for fuel cell electrode, process for producing catalyst for fuel cell electrode, film-electrode assembly, and fuel cell
  • Catalyst for fuel cell electrode, process for producing catalyst for fuel cell electrode, film-electrode assembly, and fuel cell
  • Catalyst for fuel cell electrode, process for producing catalyst for fuel cell electrode, film-electrode assembly, and fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2 and 3

[0077] By using the above-mentioned wholly aromatic polyimide, it was confirmed by measurement of visible to near-infrared absorption spectrum and the like that when CNTs were dissolved in a wide range of CNTs concentrations in the above-described manner, each carbon nanotube was dissolved independently (separately). That is, as the concentration of CNTs increases, the viscosity of the solution gradually increases, and finally forms a gel. Here, it was found that CNTs remained unbundled in any region in low-concentration solutions, viscous solutions, and gels. See Examples 2 and 3, which are described in detail below.

[0078] Another feature of the present invention's solubilization method using wholly aromatic polyimides with polycyclic aromatic moieties is the ability to selectively dissolve carbon nanotubes of several structures with specific chiral vectors. For example, in particular, when using a wholly aromatic polyimide having a repeating unit represented by the afore...

Embodiment 1

[0090] Synthesis of Wholly Aromatic Polyimide

[0091] According to the reaction schemes (A), (B) and (C) shown in Fig. 1, the wholly aromatic polyimide (hereinafter referred to as (full polyimide) Aromatic) polyimides P1, P2, P3 or simply P1, P2 and P3). Identification of the proceeds by 1 H-NMR and FT-IR measurements were performed.

[0092] Regarding the identification data, the FT-IR measurements of P1 are shown in Figure 6a middle. P1 1 H-NMR measurements are shown at Figure 6b middle. FT-IR measurements of P2 are shown at Figure 7a middle. P2 1 H-NMR measurements are shown at Figure 7b middle. FT-IR measurements of P3 are shown at Figure 8 middle.

Embodiment 2

[0094] Solubilization Test

[0095] A carbon nanotube solubilization test was performed using the wholly aromatic polyimide synthesized in Example 1 above. Each wholly aromatic polyimide was dissolved in DMSO to prepare a DMSO solution having a concentration of each wholly aromatic polyimide of 1 mg / ml. Refined SWNTs were added, and the DMSO solution was sonicated for 15 min, followed by visual observation and adsorption spectrum measurement. Then increase the concentration of SWNT, and repeat the similar operation. The SWNT concentration is 0.1 to about 3 mg / ml (weight ratio of SWNTs to polyimide: 0.1 to 3).

[0096] In each case, it was found that as the concentration of SWNT increased, the viscosity of the solution gradually increased, and above a certain concentration, the solution became a gel. That is, in the case of polyimide P1, the solution started to become viscous when the weight ratio of SWNTs to polyimide was around 0.98, and gel formation was observed when the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A catalyst for fuel cell electrodes which is advantageous for inhibiting a carbon support, e.g., carbon nanotubes, from agglomerating and is advantageous for keeping three ingredients consisting of the carbon support, a catalyst ingredient, and an electrolyte ingredient in tight contact with one another; and a process for producing the catalyst for fuel cell electrodes. The catalyst for fuel cell electrodes comprises a carbon support having a n-conjugated system (e.g., CNTs), an electrolyte ingredient having an aromatic ring, and a catalyst ingredient. In the process for producing the catalyst for fuel cell electrodes, a carbon support having a n-conjugated system (e.g., CNTs), an electrolyte ingredient having an aromatic ring, and a catalyst ingredient are brought into contact with one another in a solvent. Thus, the carbon support can be modified with the electrolyte ingredient and the catalyst ingredient can be fixed to the support.

Description

technical field [0001] The present invention relates to catalysts with carbon supports for fuel cell electrodes, methods of manufacturing catalysts for fuel cell electrodes, membrane electrode assemblies and fuel cells. Background technique [0002] A fuel cell includes a membrane electrode assembly, a fuel supply device located on one outer side of the membrane electrode assembly, and an oxidant supply device located on the other outer side of the membrane electrode assembly and supplies an oxidant. The membrane electrode assembly includes an ion-conductive electrolyte component membrane, catalyst layers positioned on both sides of the electrolyte component membrane, and gas diffusion layers positioned outside the catalyst layer. In order to increase the power output of a fuel cell, it is necessary to make the carbon support (which is an electron conductor), the catalyst component which enhances the reactivity of the fuel and the oxidant, and the electrolyte component (whic...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/96H01M4/88H01M4/90H01M8/10
CPCH01M8/1032H01M4/9083H01M8/1027H01M8/1004H01M4/926H01M8/103H01M4/90Y02E60/521H01M2300/0082H01M4/8668Y02E60/50Y02P70/50
Inventor 吉田怜中岛直敏朝冈贤彦长谷川正树
Owner TOYOTA JIDOSHA KK
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com