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Tube-type solid polymer fuel cell and method for manufacturing tube-type solid polymer fuel cell

A solid polymer and fuel cell technology, which is applied in the direction of solid electrolyte fuel cells, fuel cell parts, fuel cell shapes/forms, etc., can solve problems such as difficult filling and complicated manufacturing steps, and achieve improved power generation performance and improvement Power generation performance, effect of improving diffusion ability

Inactive Publication Date: 2009-06-24
TOYOTA JIDOSHA KK
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] (1) Manufacturing steps become complicated because a step of removing the resin used for filling is required
[0010] (2) Since the resin is located inside the tubular fuel cell, it is difficult to determine the

Method used

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  • Tube-type solid polymer fuel cell and method for manufacturing tube-type solid polymer fuel cell

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example 1

[0057] Similar to Comparative Example 3, Figure 5 shows a structure in which the gaps serving as the gas passages of the internal current collectors in a tubular fuel cell are filled with γ-alumina mixed with a corrosion-resistant conductive particles. Figure 5 A method for its manufacture is also shown. In the present invention, in order to clean the gas channels of the inner current collector and ensure the conductivity of the gas channels, these gas channels are filled with fine-pored γ-alumina in which corrosion-resistant conductive particles. The structure thus obtained can prevent infiltration of catalyst slurry during MEA fabrication, ensure gas diffusibility during power generation without any cleaning step after MEA fabrication, and reduce cell resistance during fuel cell operation.

[0058] Specifically, conductive particles having corrosion resistance such as carbon powder (for example, Ketjen EC) are mixed in a γ-alumina solution prepared by a usual preparatio...

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Abstract

A tube-shaped solid polymer fuel cell is provided with communicating fuel gas channels 2 on the periphery of a bar-shaped current collector 1 and along the axis of the bar-shaped current collector 1 and the membrane-electrode assembly (MEA) 6 on the outside of the bar-shaped current collector 1 and the fuel gas channels 2 and has a structure in which a fuel gas flows through the fuel gas channels 2 and an oxide gas flows outside the membrane-electrode assembly (MEA) 6, wherein some or all of the fuel gas channels 2 are filled with a porous material having communication pores along the axis thereof and a conductive particulate having resistance to corrosion is mixed in with the porous material. The tube-shaped solid polymer fuel cell of the present invention makes it possible to improve gas flowability at the time of production of catalyst layers while avoiding infiltration of the gas channels by a catalyst ink so as to block the channels and thus lower cell resistance at the time of fuel cell operation. Thus, power generation performance is improved by the present invention.

Description

technical field [0001] The present invention relates to a tubular solid polymer fuel cell using a rod-shaped current collector and a method of manufacturing the tubular solid polymer fuel cell. Background technique [0002] Fuel cells generate electrical energy that is converted and harvested directly from chemical energy by electrochemical oxidation of a fuel, such as hydrogen or methanol, in the cell. In recent years, fuel cells have attracted attention as clean electric power sources. In particular, the use of solid polymer fuel cells, in which a proton exchange membrane is used as the electrolyte, enables high power density and low temperature operation. Therefore, such a solid polymer fuel cell is expected to be used as a power source for mobile vehicles in addition to compact fuel cells being used as home stationary power sources, portable devices, portable power sources, and the like. [0003] A conventional solid polymer fuel cell is constituted by separately provi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M8/10
CPCH01M8/0258H01M2008/1095H01M8/04089H01M8/004H01M8/0247Y02E60/521H01M8/1004Y02P70/50Y02E60/50H01M8/026
Inventor 滨雄一郎S·库仑格特
Owner TOYOTA JIDOSHA KK
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