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

Direct oxidation fuel cell and method for making same

A fuel cell, direct technology, applied in the direction of fuel cells, fuel cell components, solid electrolyte fuel cells, etc., can solve the problems of increased fuel crossover effect, fuel utilization rate and power generation characteristics decline

Inactive Publication Date: 2007-08-22
PANASONIC CORP
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the fuel crossover effect increases, resulting in a decrease in fuel utilization and power generation characteristics

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
  • Direct oxidation fuel cell and method for making same
  • Direct oxidation fuel cell and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0055] FIG. 1 is a schematic longitudinal sectional view showing the structure of a fuel cell according to an embodiment of the present invention. In this embodiment, the fuel cell is composed of one unit cell. The unit cell 10 includes a membrane electrode assembly (MEA) sandwiched between an anode-side separator 14 and a cathode-side separator 15 . The MEA includes a hydrogen ion conductor electrolyte membrane 11 and an anode 12 and a cathode 13 sandwiching the electrolyte membrane 11 . The anode-side separator 14 has flow channels 16 for supplying and discharging fuel to and from the anode side. The cathode-side separator 15 is provided with gas flow channels 17 for supplying and exhausting oxidant gas to and from the cathode side. Gaskets 18 and 19 are mounted on the periphery of the anode and cathode to sandwich the electrolyte membrane.

[0056] The unit cell 10 also includes current collector plates 20 and 21, heater plates 22 and 23, insulator plates 24 and 25, and ...

Embodiment 1

[0070] 30wt% platinum and 30wt% ruthenium with an average particle size of 30 Å were coated on carbon black (ketjen black EC, Mitsubishi Chemicals) with an average primary particle size of 30nm, namely conductive carbon particles, to prepare anode catalyst carrier particles. In addition, 50 wt % of platinum having an average particle size of 30 Å was coated on the same ketjen black EC to prepare cathode catalyst carrier particles. A dispersion of anode catalyst support particles or cathode catalyst support particles in an aqueous isopropanol solution and a polymer electrolyte dispersion in an aqueous solution of isopropanol were mixed together, and the mixture was highly dispersed using a ball mill. An anode catalyst slurry and a cathode catalyst slurry were prepared by this method. The weight ratio of catalyst support particles and polymer electrolyte in the catalyst slurry is 1:1. The polymer electrolyte employed was a perfluorocarbon sulfonate ionomer (Flemion, available f...

Embodiment 2

[0079] Fuel cell B was prepared in the same manufacturing method as in Example 1, except that the device in Fig. 3 was used for spray coating by adding deionized water to tetrafluoroethylene-hexafluoropropylene copolymer resin (ND-10E, A diluted solution (40 wt% FEP content) was prepared in a dispersion (available from Daikin Industries Co., Ltd.) to form a hydrophobic layer.

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
surface temperatureaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

A direct oxidation fuel cell includes at least one unit cell. The at least one unit cell includes: an anode; a cathode; a hydrogen-ion conductive polymer electrolyte membrane interposed between the anode and the cathode; an anode-side separator having a flow channel for supplying and discharging a fuel to and from the anode; and a cathode-side separator having a gas flow channel for supplying and discharging an oxidant gas to and from the cathode. A water-repellent layer is formed on each side of the electrolyte membrane so as to surround the anode or the cathode. When the MEA is hydrated or when a liquid fuel is supplied to the cell for power generation, the part of the electrolyte membrane surrounding the electrodes is prevented from becoming swollen or deformed rapidly. It is therefore possible to ensure adhesion of the electrodes to the electrolyte membrane.

Description

technical field [0001] The present invention relates to a solid polymer electrolyte fuel cell which can directly utilize fuel without converting it into hydrogen, and to a method of manufacturing the cell. Background technique [0002] With the development of the ubiquitous network society, there is an increasing demand for portable devices such as cellular phones, notebook personal computers, and digital cameras. As a power source for these devices, since the fuel cell does not need to be charged and can continuously supply power to these devices when there is fuel supply, people hope to realize the practical application of the fuel cell as soon as possible. [0003] Among fuel cells, direct oxidation fuel cells are gaining increasing attention. Direct oxidation fuel cells generate electricity by supplying a liquid fuel such as methanol or dimethyl ether directly to the cell that does not need to be converted to hydrogen, and allowing it to oxidize at the anode. Since suc...

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): H01M8/10
CPCH01M8/1011Y02E60/521H01M8/1039H01M8/1023H01M8/1009H01M8/1004H01M4/881H01M8/1025H01M8/0273Y02E60/50Y02P70/50H01M8/02
Inventor 植田英之秋山崇
Owner PANASONIC CORP