Packaging structure of fuel cell membrane electrode assembly and manufacturing method and application thereof

Abstract

The invention discloses a packaging structure of a fuel cell membrane electrode assembly and a manufacturing method and application thereof. The invention provides the packaging structure of the membrane electrode assembly and the manufacturing method and application thereof. The packaging structure comprises the membrane electrode assembly; a sealing frame which comprises a first closed annular frame and a second closed annular frame which are in lap joint with the outer edge of the membrane electrode assembly and are connected through a bonding layer; a first gas diffusion layer which is arranged on the upper surface of the sealing frame, wherein a first accommodating space is defined by the first gas diffusion layer, the sealing frame and the membrane electrode assembly; a second gas diffusion layer which is arranged on the lower surface of the sealing frame, wherein a second accommodating space is defined by the second gas diffusion layer, the sealing frame and the membrane electrode assembly; a third gas diffusion layer which is arranged in at least one of the first containing space and the second containing space, wherein when the third gas diffusion layer is arranged in thefirst containing space, the thickness of at least one part is the same as the height of the first containing space. When arranged in the second containing space, at least one part of the thickness isthe same as the height of the second containing space. The catalyst layer in the packaging structure is not easy to degrade, short circuit is not easy to occur, gas exchange is not easy to occur at two sides of the membrane electrode assembly, and the performance is better.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a packaging structure of a fuel cell membrane electrode assembly and a manufacturing method thereof, a fuel cell stack, a fuel cell system and an electric vehicle. Background technique [0002] In the related art, the fuel cell utilizes the chemical reaction of fuel and oxygen to generate water to generate electricity. For this purpose, the fuel cell contains as a core component a membrane electrode assembly (MEA-membrane electrode assembly), which consists of a proton exchange membrane and electrodes (anode and cathode) arranged one on each side of the membrane. In addition, a gas diffusion layer (GDL, Gas Diffusion layer) can be provided on both sides of the membrane electrode assembly, on the side of the electrode facing away from the proton exchange membrane. Typically a fuel cell consists of a number of MEAs arranged in a stack whose electrical power is summed. When the ...

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Problems solved by technology

However, after the sealing frame is installed, it will produce certain resistance to the electrochemical reaction in the fuel cell, and it is also not conducive to the compression and stacking of other structures. chemical properties

[0004] Therefore, the performance of current fuel cells still needs to be improved.

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