Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Solid polymer fuel cell

A solid electrolyte and fuel cell technology, applied in solid electrolyte fuel cells, fuel cells, fuel cell components, etc.

Inactive Publication Date: 2006-09-27
TOYOTA JIDOSHA KK
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the present inventors have discovered that even perfluorinated electrolytes degrade over time if used over time under fuel cell operating conditions

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
  • Solid polymer fuel cell

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0081] By adding cerium nitrate (Ce(NO 3 ) 3 ·6H 2 O) was added to 100 ml of water to prepare an aqueous solution so that the concentration of Ce ions was 0.05 wt%. A perfluorinated electrolyte film (Nafion (registered trademark) film) was immersed in this aqueous solution, and heated at 90° C. for 2 hours. Then, the film was immersed in 100ml of 0.1M H 3 PO 4 aqueous solution, and hydrolyzed at 90°C for 1 hour. The color of the film gradually changed to white, and Ce phosphate was fixed to the inside of the film. Then, the membrane was washed several times with ion-exchanged water and heated at 90 °C for 30 min in ion-exchanged water to remove excess H 3 PO 4 . The fixed amount of Ce phosphate obtained from the weight change of the film was 1.6 wt%.

[0082] Next, this film was placed in 200ml of hydrogen peroxide and iron (II) chloride (Fe 2 Cl) (corresponding to 14 ppm of Fe) in an aqueous solution, and subjected to an immersion test at 100°C for 24 hours. After ...

example 2

[0084] The perfluorinated electrolyte film with Gd phosphate immobilized on it was prepared by the same process as in Example 1, except that gadolinium nitrate (Gd(NO 3 ) 3 ) as a water-soluble salt. The fixed amount of phosphoric acid Gd obtained from the weight change of the film was 4.3 wt%. For the obtained film, F ion concentration and weight loss were measured under the same conditions as in Example 1. As a result, the concentration of F ions was 18.4 ppm and the weight loss was -1.3 wt%.

example 3

[0086] The perfluorinated electrolyte film on which La phosphate was immobilized was prepared by the same process as in Example 1, except that lanthanum nitrate (La(NO 3 ) 3 ) as a water-soluble salt. The fixed amount of phosphoric acid La obtained from the weight change of the film was 3.9 wt%. For the obtained film, the F ion concentration was measured under the same conditions as in Example 1. As a result, the concentration of F ions was 5.8 ppm.

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
Login to View More

Abstract

To improve oxidation resistance of an electrolyte membrane and durability thereof by a low-cost method, thereby improving durability of a polymer electrolyte fuel cell. According to the present invention, in the polymer electrolyte fuel cell having a membrane-electrode assembly including a polymer electrolyte membrane and electrodes bonded to both sides of the polymer electrolyte membrane, phosphate containing at least one metallic element selected from a rare earth element, Ti, Fe, Al and Bi is fixed to at least one of the polymer electrolyte membrane and the electrodes.

Description

technical field [0001] The present invention relates to a polymer electrolyte fuel cell, more specifically, to a polymer electrolyte fuel cell suitable for vehicle power supplies, fixed small generators, waste energy power generation systems and the like. Background technique [0002] Polymer electrolytes are polymer materials that have electrolyte groups such as sulfonic acid groups in the polymer chain. Polymer electrolytes are formed into particles, fibers, or films because of their properties of strongly bonding to specific ions and selectively allowing permeation of cations and anions, and are used in various applications such as electrodialysis, diffusion dialysis, and battery separators . [0003] For example, in various electrochemical devices such as polymer electrolyte fuel cells and water electrolyzers, polymer electrolytes are formed as thin films and used in the state of a membrane electrode assembly (MEA) with both sides Engage with electrodes. Furthermore, ...

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): H01M8/02H01M8/10H01M4/86H01M4/88H01M4/90
CPCH01M8/0291Y02E60/521H01M4/8605H01M8/1039H01M4/9016H01M8/1051H01M8/1023H01M8/1004H01M4/881H01M8/1088H01M4/8842H01M8/0289Y02E60/50Y02P70/50
Inventor 三浦房美竹下朋洋畑中达也森本友小林雅史加藤学竹内仙光
Owner TOYOTA JIDOSHA KK
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com