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Membrane electrode assembly, method for manufacturing fuel cell and the same

A membrane-electrode assembly and technology for manufacturing method, which are applied to fuel cell parts, solid electrolyte fuel cells, battery electrodes, etc., can solve the problems of reduced power generation efficiency, hindered air diffusion, etc., and achieve the effect of suppressing the reduction of power generation efficiency

Inactive Publication Date: 2008-09-10
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] As described above, since water is generated at the cathode, when the water stays at the cathode, the diffusion of air to the catalyst layer may be hindered, resulting in a decrease in power generation efficiency.

Method used

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  • Membrane electrode assembly, method for manufacturing fuel cell and the same
  • Membrane electrode assembly, method for manufacturing fuel cell and the same
  • Membrane electrode assembly, method for manufacturing fuel cell and the same

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no. 1 Embodiment approach

[0040]FIG. 1 is a schematic diagram showing the configuration of a fuel cell system 100 according to the first embodiment. The fuel cell system 100 of this embodiment is suitable as a power source for portable devices such as notebook PCs and mobile phones. As shown in FIG. 1 , the fuel cell system 100 has a fuel cartridge 110 , a reformer 120 , and a fuel cell 10 .

[0041] The fuel cartridge 110 stores hydrocarbon (hydrocarbon) fuels such as methanol, methane, and butane. The fuel cartridge 110 is detachable, and when the hydrocarbon fuel is consumed and the remaining amount is insufficient, it can be replaced with a fuel cartridge 110 filled with sufficient hydrocarbon fuel. The hydrocarbon fuel discharged from the fuel cartridge 110 is sent to the reforming unit 120 through the pipe 112 . In addition, a gasifier, a desulfurizer, and the like may be properly installed between the fuel cartridge 110 and the reforming unit 120 .

[0042] The reformer 120 converts the hydro...

no. 2 Embodiment approach

[0068] Figure 4 It is a plan view of the membrane electrode assembly of the second embodiment. The membrane electrode assembly 160 of the present embodiment is different from the linear groove portion 68 of the membrane electrode assembly 60 of the first embodiment in that the discontinuous linear groove portion 168 surrounded by the electrode formation region Y is formed. Accordingly, the strength of the membrane electrode assembly 160 can be increased.

no. 3 Embodiment approach

[0070] Figure 5 It is a plan view of the membrane electrode assembly of the third embodiment. The membrane electrode assembly 260 of the present embodiment is different from the linear groove portion 68 of the membrane electrode assembly 60 of the first embodiment in that a continuous and curved groove portion 268 surrounded by the electrode formation region Y is formed. Accordingly, the strength of the membrane electrode assembly 260 can be increased.

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Abstract

A membrane electrode assembly includes an electrolyte membrane, an anode disposed on one face of the electrolyte membrane, and a cathode disposed on the other face of the electrolyte membrane. The electrolyte membrane has a non-electrode-forming region where the cathode is not disposed on the surface of the non-electrode-forming region and an electrode-forming region where the cathode is disposed on the surface of the electrode-forming region. The non-electrode-forming region has a thin membrane region where the membrane is thinner than that in the electrode-forming region. The drop in power generation efficiency by water generated at the cathodes is prevented.

Description

technical field [0001] The present invention relates to a fuel cell for generating electricity using hydrogen-containing fuel. Background technique [0002] In recent years, fuel cells that have high energy conversion efficiency and do not generate harmful substances through a power generation reaction have attracted attention. As one of such fuels, a solid polymer fuel cell operating at a low temperature of 100° C. or lower is known. [0003] A solid polymer fuel cell is a device that has a basic structure in which a solid polymer membrane as an electrolyte membrane is disposed between a fuel electrode (anode) and an air electrode (cathode), and fuel gas containing hydrogen is supplied to the fuel electrode , supply oxygen-containing oxidant gas to the air electrode, and generate electricity by the following electrochemical reaction. [0004] Fuel electrode: H 2 →2H + +2e - (1) [0005] Air electrode: 1 / 2O 2 +2H + +2e - →H 2 O (2) [0006] The anode and the c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M4/86H01M8/10
CPCY02E60/521Y02E60/50Y02P70/50
Inventor 福岛诚安尾耕司井村真一郎
Owner JX NIPPON OIL & ENERGY CORP
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