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

Cathode for fuel cell and polymer electrolyte fuel cell having same

A fuel cell cathode and polymer technology, applied in the direction of solid electrolyte fuel cells, fuel cells, battery electrodes, etc., can solve the problems of insufficient reduction of cathode overvoltage, insufficient durability of the catalyst layer, lack of oxygen permeability, etc., and achieve excellent Electrode characteristics, increased exchange current density, effect of good electrode characteristics

Inactive Publication Date: 2007-01-31
TOYOTA JIDOSHA KK
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, even the polymer electrolyte fuel cell disclosed in Japanese Patent Laid-Open No. 11-354129A (1999) is still deficient in oxygen permeability in the catalyst layer of the cathode, thereby not sufficiently reducing the overvoltage of the cathode
In addition, the durability of the catalyst layer of the cathode is insufficient, leading to a problem of reducing battery life

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
  • Cathode for fuel cell and polymer electrolyte fuel cell having same
  • Cathode for fuel cell and polymer electrolyte fuel cell having same
  • Cathode for fuel cell and polymer electrolyte fuel cell having same

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0066] CeO 2 -ZrO 2 Mixed oxides are used as oxygen absorbing / releasing agents. Printex XE2B was used as the carbon material, and for the platinum material, chloroplatinic acid was supported by carbon by impregnation. CeO loaded with 5wt.% platinum 2 -ZrO 2 A mixed oxide (20 wt.%) was mixed with platinum-supporting carbon to prepare a catalyst.

example 2-1

[0082] Such an electrode is prepared in the following process, the film thickness of the electrode is 3 mil, including a mixed carbon catalyst supporting PtFe (60wt.%) and Ce-Zr-O supporting Pt (5wt.%) x Powder (20wt.%) was pretreated according to the following procedure.

[0083] (1) Ce-Zr-O x The composite oxide powder was dipped into an aqueous solution of dinitrobisamine Pt complex and stirred, then evaporated at 120°C to dry (contains 5 wt.% of Pt relative to the powder)

[0084] (2) After grinding in a mortar, the powder was baked in an atmospheric oven at 500°C for 2 hours, and the powder was ground in a mortar again.

[0085] (3) A commercially available carbon catalyst loaded with PtFe (60wt.%) and a predetermined amount of ion-exchanged water, Ce-Zr-O loaded with Pt 5wt.% x Powder (20 wt.% with respect to the catalyst), electrolyte solution (Nafion), ethanol, and propylene glycol were mixed to obtain a catalyst ink.

[0086] (4) After the catalyst ink was stirred ...

example 2-2

[0091] Such an electrode was prepared with a film thickness of 6 mil, including a mixed carbon catalyst supporting PtFe (30wt.%) and Ce-Zr-O supporting Pt (5wt.%) x Powder (20 wt.%). This example is similar to Example 2-1, but a PtFe (30 wt.%)-supported carbon catalyst was used instead in step (3), and a membrane with a film thickness of 6 mils was used in step (5).

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
particle sizeaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A fuel cell cathode comprises a catalyst layer comprised of a catalyst-supported electrically conducive carrier and a polymer electrolyte. The catalyst-supporting electrically conductive carrier further supports or has mixed therein a catalyst that is in contact with an oxygen absorbing / releasing material. The cathode has excellent electrode characteristics with respect to oxygen-reducing reactions. A polymer electrolyte fuel cell fitted with the cathode can provide high battery output.

Description

technical field [0001] The invention relates to a fuel cell cathode and a polymer electrolyte fuel cell with the fuel cell cathode. Background technique [0002] A polymer electrolyte fuel cell having a polymer electrolyte membrane can easily be reduced in size and weight. Therefore, it is increasingly expected to be used as a power source in mobile vehicles such as electric vehicles, and in small-sized cogeneration systems in practical applications. However, polymer electrolyte fuel cells have a low operating temperature, and it is difficult to effectively use the obtained waste heat for the purpose of auxiliary mobile power or the like. Therefore, if a polymer electrolyte fuel cell is to be put into practical use, it is necessary to provide the ability to obtain high Power generation efficiency and high output density. [0003] The electrode reaction in each catalyst layer of the anode and cathode of the polymer electrolyte fuel cell proceeds at the three-phase interfac...

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): H01M4/86H01M8/10H01M4/88H01M4/90H01M4/92
CPCH01M4/8828H01M4/926H01M4/90Y02E60/521H01M8/1004H01M4/8605H01M4/921Y02E60/50
Inventor 河村哲雄
Owner TOYOTA JIDOSHA KK