A method for promoting liquid-phase water discharge from a gas diffusion layer of a fuel cell

A gas diffusion layer and fuel cell technology, applied in fuel cells, electrical components, battery electrodes, etc., can solve problems such as battery performance degradation, and achieve the effects of reducing difficulty, ensuring concentration, and avoiding flooding

Inactive Publication Date: 2018-12-28
CHENDU NEW KELI CHEM SCI CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0007] Aiming at the current problem that water flooding easily occurs in the gas diffusion layer of the fuel cell, thereby leading to a decrease in battery performance, the present invention proposes a method for promoting the discharge of liquid phase water in the gas diffusion layer of the fuel cell, thereby effectively ensuring the liquid phase water in the gas diffusion layer. The outflow and gas entry ensure the gas-liquid balance in the gas diffusion layer and avoid the occurrence of water flooding

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  • A method for promoting liquid-phase water discharge from a gas diffusion layer of a fuel cell

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Effect test

Embodiment 1

[0029] (1) First inject the phthalocyanine metal complex slurry into the rectangular diversion groove of the fuel cell plate material, so that the slurry is evenly dispersed in the diversion groove, and then cover the part of the polar plate that is not the diversion groove with a mask, Then place it in a vacuum furnace for plasma heat treatment under a protective gas source. After the phthalocyanine metal complex is pyrolyzed, a porous carbon nanotube array is formed inside the diversion groove. Then the mask is peeled off and the diversion groove is rinsed with deionized water. After drying, the polar plate diversion channel with porous carbon nanotube arrays grown on the surface is obtained; the polar plate material is graphite polar plate; in the phthalocyanine metal complex slurry, the metal is iron, and the mass concentration is 28%; the protective gas source is hydrogen , Methane is a mixed gas obtained according to the mass ratio of 1:0.9; the temperature of plasma heat...

Embodiment 2

[0038] (1) First inject the phthalocyanine metal complex slurry into the rectangular diversion groove of the fuel cell plate material, so that the slurry is evenly dispersed in the diversion groove, and then cover the part of the polar plate that is not the diversion groove with a mask, Then place it in a vacuum furnace for plasma heat treatment under a protective gas source. After the phthalocyanine metal complex is pyrolyzed, a porous carbon nanotube array is formed inside the diversion groove. Then the mask is peeled off and the diversion groove is rinsed with deionized water. After drying, the polar plate diversion tank with porous carbon nanotube arrays grown on the surface is obtained; the polar plate material is a copper plate after acid-resistant treatment; in the phthalocyanine metal complex slurry, the metal is copper, and the mass concentration is 20%; The protective gas source is a mixed gas obtained by hydrogen and methane at a mass ratio of 1:0.8; the temperature ...

Embodiment 3

[0045] (1) First inject the phthalocyanine metal complex slurry into the rectangular diversion groove of the fuel cell plate material, so that the slurry is evenly dispersed in the diversion groove, and then cover the part of the polar plate that is not the diversion groove with a mask, Then place it in a vacuum furnace for plasma heat treatment under a protective gas source. After the phthalocyanine metal complex is pyrolyzed, a porous carbon nanotube array is formed inside the diversion groove. Then the mask is peeled off and the diversion groove is rinsed with deionized water. After drying, the plate diversion channel with porous carbon nanotube arrays grown on the surface is obtained; the plate material is a graphite plate; in the phthalocyanine metal complex slurry, the metal is cobalt, and the mass concentration is 40%; the protective gas source is hydrogen , Methane is a mixed gas obtained according to the mass ratio of 1: 1.2; the temperature of plasma heat treatment is...

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Abstract

A method for promoting liquid-phase water discharge from a gas diffusion layer of a fuel cell is provided. The method comprises following steps: at first, an organic material is put in a flow guidinggroove of an electrode plate, a hollow tubular array is grown on the surface of the organic material, and then carbon fibers are arranged between the array layers for filling and hydrophobic treatmentis performed to form a structure in which the hydrophobic hollow tubular array is directly connected with a metal electrode plate flow guide groove, so that the liquid phase water in the gas diffusion layer of the fuel cell can be discharged in a timely manner. The method provided by the invention provides a good liquid flow channel for the gas diffusion layer, thereby effectively suppressing water flooding inside the gas diffusion layer, simultaneously separating gas from liquid in the gas diffusion layer, ensuring the concentration of fuel gas, and ensuring the durability of the gas diffusion layer and even the whole fuel cell.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a method for promoting the discharge of liquid-phase water in a gas diffusion layer of a fuel cell. Background technique [0002] As the price of oil continues to rise and remains at a high level, governments of various countries have increased research and investment in oil substitute products, especially in China, which is seriously short of oil, and urgently needs to develop new energy sources, and fuel cells can solve this problem. At the same time, the pollution to the environment is relatively small. In particular, proton exchange membrane fuel cells, because of their high power density, high energy conversion efficiency, low-temperature start-up, no pollution, and light weight, are especially suitable as mobile power sources, and thus have attracted widespread attention. [0003] The core component of a proton exchange membrane fuel cell is a membrane-electrode triplet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M8/0234H01M8/0245
CPCH01M4/8807H01M8/0234H01M8/0245Y02E60/50
Inventor 陈庆廖健淞
Owner CHENDU NEW KELI CHEM SCI CO LTD
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