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Fuel cell membrane electrode and fuel cell

A fuel cell and membrane electrode technology, which is applied in the direction of fuel cells, battery electrodes, fuel cell components, etc., can solve the problems of battery performance degradation, intensified combustion reaction, and inability to generate electricity, so as to improve durability and improve system efficiency Effect

Inactive Publication Date: 2005-08-03
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These will damage the polymer electrolyte, causing voltage drop or membrane rupture
As a result, a large amount of hydrogen and oxygen are further permeated from the damaged part, which further intensifies the combustion reaction, accelerates the damage of the membrane, and at the same time reduces the performance of the battery. In the worst case, it leads to failure to generate electricity

Method used

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  • Fuel cell membrane electrode and fuel cell

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preparation example Construction

[0064]Various methods can be mentioned for the preparation method of the electrode catalyst for fuel cells, and the present invention is not limited in any way. For example, in the case of containing a carrier component, the following preparation methods are available. The carrier component is not particularly limited, and examples thereof include conductive porous substance powder, carbon-based powder, and the like, and examples of the carbon-based powder include powders of graphite, carbon black, and conductive activated carbon.

[0065] The method of supporting platinum or other active metal components on a carrier component such as carbon is not particularly limited, but powder mixing (solid phase mixing) or liquid phase mixing is preferable. As the above-mentioned liquid-phase mixing, a method of dispersing a carrier such as carbon in a colloidal liquid of the catalyst component and adsorbing it can be mentioned. Alternatively, if necessary, an active oxygen removal mater...

Embodiment 1

[0071] A fuel cell unit according to an embodiment of the present invention was produced, and its performance was evaluated.

[0072] TiO 2 Powder (trade name: ST-01, manufactured by Ishihara Sangyo Co., Ltd.) was prepared in a cation-exchange polymer solution (5% Nafion (registered trademark), manufactured by DuPont Co., Ltd.) with ethanol as a solvent to prepare a mixed solution (A), and the dried solid The volume ratio of the ingredients is 1:1. This solution (A) was coated on the entire surface of one side of a perfluorosulfonic acid resin membrane (trade name: Nafion 112, manufactured by DuPont Co., Ltd.) as an electrolyte membrane so that the thickness of the active oxygen removal layer on the electrolyte membrane was 15 μm. An active oxygen removal layer is formed on the surface of the electrolyte membrane.

[0073] As the respective catalysts of the cathode and the anode, carbon black is used to support 45% by weight of platinum-based catalyst particles with an avera...

Embodiment 2

[0078] Activated carbon (trade name: Max Soub, manufactured by Mitsubishi Chemical) was used instead of TiO in Example 1 above. 2 As an active oxygen removal material, a fuel cell in the form of an electrolyte membrane / electrode assembly was formed in the same manner as in Example 1, and a durability evaluation test was performed.

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Abstract

A fuel cell membrane electrode having a cathode catalyst layer on one surface of a polymer electrolyte membrane, and an anode catalyst layer on the other surface of the membrane, the cathode catalyst layer being supplied with an oxygen-containing gas, and the anode catalyst layer being supplied with a hydrogen-containing gas, and characterized in that an active oxygen removing layer containing an active oxygen removing material is provided on at least one of interfaces between the membrane and the catalyst layers coated on both surfaces of the membrane, and the active oxygen removing material is Co3O4, Sb2O4, activated carbon, or a solid acid catalyst; and a fuel cell using the membrane electrode.

Description

technical field [0001] The present invention relates to a membrane electrode for a fuel cell and a fuel cell using the membrane electrode for a fuel cell, and relates to a technique suitable as a membrane electrode for a solid polymer fuel cell. Background technique [0002] In recent years, environmental problems have become more and more serious, and solid polymer fuel cells (PEFCs) are expected to be used in a wide range of fields as a power source as a low-pollution, efficient and clean energy generation method. [0003] In general, in the main body of a solid polymer fuel cell, supplied hydrogen forms protons at the anode, moves and diffuses in the polymer membrane, and reacts with oxygen supplied at the cathode to produce water. Along with this, the electrons move on the external lines connecting the electrodes to obtain electric energy. Hydrogen as fuel needs to be supplied to the anode and oxygen-containing gas to the cathode, respectively. If the electrode reactio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/90H01M8/02H01M8/10
CPCH01M4/90H01M4/86Y02E60/521H01M2300/0082H01M8/1004Y02E60/50
Inventor 渡边悟弦卷茂伊藤荣基森贺卓也吉田博久佐藤昭男野岛繁山田保山田昭彦
Owner MITSUBISHI HEAVY IND LTD