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Gas diffusion layer and process for production thereof, and fuel cell

一种气体扩散层、燃料电池的技术，应用在固体电解质燃料电池、燃料电池、燃料电池的零部件等方向，能够解决发电性能降低、电压降低、发电分布不均等问题，达到提高发电性能、低成本化、抑制发电分布的不均的效果

Active Publication Date: 2011-11-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this case, the gas diffusibility is hindered, and in particular, the reactant gas cannot reach the catalyst layer vertically below the ridge portion, causing unevenness in the in-plane power generation distribution and lowering the voltage.
That is, as a result, the power generation performance decreases

Method used

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  • Gas diffusion layer and process for production thereof, and fuel cell
  • Gas diffusion layer and process for production thereof, and fuel cell
  • Gas diffusion layer and process for production thereof, and fuel cell

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Embodiment Construction

[0075] Embodiments of the present invention will be described below with reference to the drawings. In addition, in all the following drawings, the same symbols are used for the same or corresponding parts, and overlapping descriptions are omitted.

[0076] "Implementation"

[0077] figure 1 It is a schematic sectional view showing the basic structure of a fuel cell according to an embodiment of the present invention. The fuel cell of this embodiment is a polymer electrolyte fuel cell that generates electricity and heat simultaneously by electrochemically reacting a hydrogen-containing fuel gas with an oxygen-containing oxidant gas such as air. Furthermore, the present invention is not limited to polymer electrolyte fuel cells, and can be applied to various fuel cells.

[0078] figure 1 Among them, the fuel cell of the present embodiment includes a unit (single cell) 1 having a membrane electrode assembly 10 (hereinafter referred to as MEA) and a pair of conductive flat ...

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Abstract

Disclosed is a gas diffusion layer having a gas flow path formed on one of the main surfaces thereof, which enables the further improvement in electric power generation performance. Specifically disclosed is a gas diffusion layer (14A, 14C) for a fuel cell, which is composed of multiple structures that have a first diffusion layer (15A, 15C) having a gas flow path (21A, 21C) formed on one of the main surfaces thereof and a second diffusion layer (16A, 16C) arranged on the other of the main surfaces of the first diffusion layer, wherein each of the first and second diffusion layers comprises a porous member mainly composed of electrically conductive particles and a polymer resin, and the first diffusion layer has a lower porosity than that of the second diffusion layer.

Description

technical field [0001] The present invention relates to a fuel cell that uses a reducing agent such as pure hydrogen, liquid fuel such as methanol, or modified hydrogen derived from fossil fuels as a fuel gas, and uses air (oxygen) or the like as an oxidant gas, and more specifically relates to the A gas diffusion layer included in a fuel cell and a manufacturing method thereof. Background technique [0002] A fuel cell, such as a polymer electrolyte fuel cell, is a device that electrochemically reacts a hydrogen-containing fuel gas with an oxygen-containing oxidant gas such as air in a gas diffusion layer having a catalyst layer such as platinum, while simultaneously generate electricity and heat. [0003] Figure 8 It is a schematic diagram showing the basic structure of a conventional polymer electrolyte fuel cell. A single cell (also referred to as a unit) 100 of a polymer electrolyte fuel cell has a membrane electrode assembly 110 (hereinafter referred to as MEA: Memb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/88H01M8/02H01M8/10
CPCY02T90/32H01M8/0234Y02E60/521H01M2250/20H01M8/0245H01M8/1002H01M8/0239H01M8/0258H01M8/1007Y02E60/50Y02T90/40Y02P70/50
Inventor 山内将树辻庸一郎
Owner PANASONIC CORP
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